java绘图板代码 java画图板程序源代码

JAVA实现简单的画图板

楼主写一个htmljava绘图板代码，很容易把下面代码嵌入到applet，可以google一下实现，

还有copy自己不知道算不算复制。。。-_-!

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楼主给你一个我java绘图板代码的，直接保存成pb.java编译运行，就是你要的画图功能 ，可以参考一下

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import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//画笔大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具标记

//toolFlag工具对应表java绘图板代码：

//（0--画笔）；（1--橡皮）；（2--清除）；

//（3--直线）；（4--圆）；（5--矩形）；

Color c = new Color(0,0,0); //画笔颜色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细

Point cutflag = new Point(-1, -1, c, 6, con);//截断标志

Vector paintInfo = null;//点信息向量组

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 颜色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按钮及选择项*/

//颜色选择

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//画笔大小选择

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小选择

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("画笔");

drLine = new Button("画直线");

drCircle = new Button("画圆形");

drRect = new Button("画矩形");

openPic = new Button("打开图画");

savePic = new Button("保存图画");

colchooser = new Button("显示调色板");

//各组件事件监听

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

颜色 = new Label("画笔颜色",Label.CENTER);

大小B = new Label("画笔大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加组件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(颜色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

for(int i=0; in ;i++){

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://画笔

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://画直线

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://画圆

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://画矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截断，跳过

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//预选颜色

{

String name = ColChoice.getSelectedItem();

if(name=="black")

{c = new Color(0,0,0); }

else if(name=="red")

{c = new Color(255,0,0);}

else if(name=="green")

{c = new Color(0,255,0);}

else if(name=="blue")

{c = new Color(0,0,255);}

}

else if(e.getSource()==SizeChoice)//画笔大小

{

String selected = SizeChoice.getSelectedItem();

if(selected=="1")

{

con = 1;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="3")

{

con = 3;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="5")

{con = 5;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="7")

{con = 7;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="9")

{con = 9;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

}

else if(e.getSource()==EraserChoice)//橡皮大小

{

String Esize = EraserChoice.getSelectedItem();

if(Esize=="5")

{ Econ = 5*2; }

else if(Esize=="9")

{ Econ = 9*2; }

else if(Esize=="13")

{ Econ = 13*2; }

else if(Esize=="17")

{ Econ = 17*3; }

}

}

public void mouseDragged(MouseEvent e)

{

Point p1 ;

switch(toolFlag){

case 0://画笔

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p1);

repaint();

break;

case 1://橡皮

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, null, toolFlag, Econ);

paintInfo.addElement(p1);

repaint();

break;

default :

}

}

public void mouseMoved(MouseEvent e) {}

public void update(Graphics g)

{

paint(g);

}

public void mousePressed(MouseEvent e)

{

Point p2;

switch(toolFlag){

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

default :

}

}

public void mouseReleased(MouseEvent e)

{

Point p3;

switch(toolFlag){

case 0://画笔

paintInfo.addElement(cutflag);

break;

case 1: //eraser

paintInfo.addElement(cutflag);

break;

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

default:

}

}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

public void mouseClicked(MouseEvent e){}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==pen)//画笔

{toolFlag = 0;}

if(e.getSource()==eraser)//橡皮

{toolFlag = 1;}

if(e.getSource()==clear)//清除

{

toolFlag = 2;

paintInfo.removeAllElements();

repaint();

}

if(e.getSource()==drLine)//画线

{toolFlag = 3;}

if(e.getSource()==drCircle)//画圆

{toolFlag = 4;}

if(e.getSource()==drRect)//画矩形

{toolFlag = 5;}

if(e.getSource()==colchooser)//调色板

{

Color newColor = JColorChooser.showDialog(this,"调色板",c);

c = newColor;

}

if(e.getSource()==openPic)//打开图画

{

openPicture.setVisible(true);

if(openPicture.getFile()!=null)

{

int tempflag;

tempflag = toolFlag;

toolFlag = 2 ;

repaint();

try{

paintInfo.removeAllElements();

File filein = new File(openPicture.getDirectory(),openPicture.getFile());

picIn = new FileInputStream(filein);

VIn = new ObjectInputStream(picIn);

paintInfo = (Vector)VIn.readObject();

VIn.close();

repaint();

toolFlag = tempflag;

}

catch(ClassNotFoundException IOe2)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read object");

}

catch(IOException IOe)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read file");

}

}

}

if(e.getSource()==savePic)//保存图画

{

savePicture.setVisible(true);

try{

File fileout = new File(savePicture.getDirectory(),savePicture.getFile());

picOut = new FileOutputStream(fileout);

VOut = new ObjectOutputStream(picOut);

VOut.writeObject(paintInfo);

VOut.close();

}

catch(IOException IOe)

{

System.out.println("can not write object");

}

}

}

}//end paintboard

public class pb

{

public static void main(String args[])

{ new paintboard("画图程序"); }

}

JAVA画图板程序，用netbeans做，要求画圆，椭圆，直线，三角形，矩形，可以填充颜色和擦除

import java.applet.*; 

import java.awt.*; 

import java.awt.event.*; 

import java.util.*; 

import javax.swing.*; 

import java.awt.geom.*; 

import java.io.*; 

import java.sql.Connection;

class Point implements Serializable 

{ 

int x,y; 

Color col; 

int tool; 

int boarder; 

Point(int x, int y, Color col, int tool, int boarder) 

{ 

this.x = x; 

this.y = y; 

this.col = col; 

this.tool = tool; 

this.boarder = boarder; 

} 

} 

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener 

{ 

int x = -1, y = -1; 

int con = 1;//画笔大小 

int Econ = 5;//橡皮大小 

int toolFlag = 0;//toolFlag:工具标记 

//toolFlag工具对应表： 

//（0--画笔）；（1--橡皮）；（2--清除）； 

//（3--直线）；（4--圆）；（5--矩形）； 

Color c = new Color(0,0,0); //画笔颜色 

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细 

Point cutflag = new Point(-1, -1, c, 6, con);//截断标志 

Vector paintInfo = null;//点信息向量组 

int n = 1; 

FileInputStream picIn = null; 

FileOutputStream picOut = null; 

ObjectInputStream VIn = null; 

ObjectOutputStream VOut = null; 

// *工具面板--画笔，直线，圆，矩形，多边形,橡皮，清除*/ 

Panel toolPanel; 

Button eraser, drLine,drCircle,drRect; 

Button clear ,pen; 

Choice ColChoice,SizeChoice,EraserChoice; 

Button colchooser; 

Label 颜色,大小B,大小E; 

//保存功能 

Button openPic,savePic; 

FileDialog openPicture,savePicture; 

paintboard(String s) 

{ 

super(s); 

addMouseMotionListener(this); 

addMouseListener(this); 

paintInfo = new Vector(); 

/*各工具按钮及选择项*/ 

//颜色选择 

ColChoice = new Choice(); 

ColChoice.add("black"); 

ColChoice.add("red"); 

ColChoice.add("blue"); 

ColChoice.add("green"); 

ColChoice.addItemListener(this); 

//画笔大小选择 

SizeChoice = new Choice(); 

SizeChoice.add("1"); 

SizeChoice.add("3"); 

SizeChoice.add("5"); 

SizeChoice.add("7"); 

SizeChoice.add("9"); 

SizeChoice.addItemListener(this); 

//橡皮大小选择 

EraserChoice = new Choice(); 

EraserChoice.add("5"); 

EraserChoice.add("9"); 

EraserChoice.add("13"); 

EraserChoice.add("17"); 

EraserChoice.addItemListener(this); 

//////////////////////////////////////////////////// 

toolPanel = new Panel(); 

clear = new Button("清除"); 

eraser = new Button("橡皮"); 

pen = new Button("画笔"); 

drLine = new Button("画直线"); 

drCircle = new Button("画圆形"); 

drRect = new Button("画矩形"); 

openPic = new Button("打开图画"); 

savePic = new Button("保存图画"); 

colchooser = new Button("显示调色板"); 

//各组件事件监听 

clear.addActionListener(this); 

eraser.addActionListener(this); 

pen.addActionListener(this); 

drLine.addActionListener(this); 

drCircle.addActionListener(this); 

drRect.addActionListener(this); 

openPic.addActionListener(this); 

savePic.addActionListener(this); 

colchooser.addActionListener(this); 

颜色 = new Label("画笔颜色",Label.CENTER); 

大小B = new Label("画笔大小",Label.CENTER); 

大小E = new Label("橡皮大小",Label.CENTER); 

//面板添加组件 

toolPanel.add(openPic); 

toolPanel.add(savePic); 

toolPanel.add(pen); 

toolPanel.add(drLine); 

toolPanel.add(drCircle); 

toolPanel.add(drRect); 

toolPanel.add(颜色); toolPanel.add(ColChoice); 

toolPanel.add(大小B); toolPanel.add(SizeChoice); 

toolPanel.add(colchooser); 

toolPanel.add(eraser); 

toolPanel.add(大小E); toolPanel.add(EraserChoice); 

toolPanel.add(clear); 

//工具面板到APPLET面板 

add(toolPanel,BorderLayout.NORTH); 

setBounds(60,60,900,600); setVisible(true); 

validate(); 

//dialog for save and load 

openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD); 

openPicture.setVisible(false); 

savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE); 

savePicture.setVisible(false); 

openPicture.addWindowListener(new WindowAdapter() 

{ 

public void windowClosing(WindowEvent e) 

{ openPicture.setVisible(false); } 

}); 

savePicture.addWindowListener(new WindowAdapter() 

{ 

            @Override

public void windowClosing(WindowEvent e) 

{ savePicture.setVisible(false); } 

}); 

addWindowListener(new WindowAdapter() 

{ 

public void windowClosing(WindowEvent e) 

{ System.exit(0);} 

}); 

} 

public void paint(Graphics g) 

{ 

Graphics2D g2d = (Graphics2D)g; 

Point p1,p2; 

n = paintInfo.size(); 

if(toolFlag==2) 

g.clearRect(0,0,getSize().width,getSize().height);//清除 

for(int i=0; in ;i++){ 

p1 = (Point)paintInfo.elementAt(i); 

p2 = (Point)paintInfo.elementAt(i+1); 

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL); 

g2d.setColor(p1.col); 

g2d.setStroke(size); 

if(p1.tool==p2.tool) 

{ 

switch(p1.tool) 

{ 

case 0://画笔 

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y); 

g2d.draw(line1); 

break; 

case 1://橡皮 

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder); 

break; 

case 3://画直线 

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y); 

g2d.draw(line2); 

break; 

case 4://画圆 

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y)); 

g2d.draw(ellipse); 

break; 

case 5://画矩形 

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y)); 

g2d.draw(rect); 

break; 

case 6://截断，跳过 

i=i+1; 

break; 

default : 

}//end switch 

}//end if 

}//end for 

} 

public void itemStateChanged(ItemEvent e) 

{ 

if(e.getSource()==ColChoice)//预选颜色 

{ 

String name = ColChoice.getSelectedItem(); 

            switch (name) {

                case "black":

                    c = new Color(0,0,0);

                    break;

                case "red":

                    c = new Color(255,0,0);

                    break;

                case "green":

                    c = new Color(0,255,0);

                    break;

                case "blue":

                    c = new Color(0,0,255);

                    break;

            }

} 

else if(e.getSource()==SizeChoice)//画笔大小 

{ 

String selected = SizeChoice.getSelectedItem(); 

            switch (selected) {

                case "1":

                    con = 1;

                    size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

                    break;

                case "3":

                    con = 3;

                    size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

                    break;

                case "5":

                    con = 5;

                    size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

                    break;

                case "7":

                    con = 7;

                    size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

                    break;

                case "9":

                    con = 9;

                    size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

                    break;

            }

} 

else if(e.getSource()==EraserChoice)//橡皮大小 

{ 

String Esize = EraserChoice.getSelectedItem(); 

if(Esize=="5") 

{ Econ = 5*2; } 

else if(Esize=="9") 

{ Econ = 9*2; } 

else if(Esize=="13") 

{ Econ = 13*2; } 

else if(Esize=="17") 

{ Econ = 17*3; } 

} 

} 

public void mouseDragged(MouseEvent e) 

{ 

Point p1 ; 

switch(toolFlag){ 

case 0://画笔 

x = (int)e.getX(); 

y = (int)e.getY(); 

p1 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p1); 

repaint(); 

break; 

case 1://橡皮 

x = (int)e.getX(); 

y = (int)e.getY(); 

p1 = new Point(x, y, null, toolFlag, Econ); 

paintInfo.addElement(p1); 

repaint(); 

break; 

default : 

} 

} 

public void mouseMoved(MouseEvent e) {} 

public void update(Graphics g) 

{ 

paint(g); 

} 

public void mousePressed(MouseEvent e) 

{ 

Point p2; 

switch(toolFlag){ 

case 3://直线 

x = (int)e.getX(); 

y = (int)e.getY(); 

p2 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p2); 

break; 

case 4: //圆 

x = (int)e.getX(); 

y = (int)e.getY(); 

p2 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p2); 

break; 

case 5: //矩形 

x = (int)e.getX(); 

y = (int)e.getY(); 

p2 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p2); 

break; 

default : 

} 

} 

public void mouseReleased(MouseEvent e) 

{ 

Point p3; 

switch(toolFlag){ 

case 0://画笔 

paintInfo.addElement(cutflag); 

break; 

case 1: //eraser 

paintInfo.addElement(cutflag); 

break; 

case 3://直线 

x = (int)e.getX(); 

y = (int)e.getY(); 

p3 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p3); 

paintInfo.addElement(cutflag); 

repaint(); 

break; 

case 4: //圆 

x = (int)e.getX(); 

y = (int)e.getY(); 

p3 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p3); 

paintInfo.addElement(cutflag); 

repaint(); 

break; 

case 5: //矩形 

x = (int)e.getX(); 

y = (int)e.getY(); 

p3 = new Point(x, y, c, toolFlag, con); 

paintInfo.addElement(p3); 

paintInfo.addElement(cutflag); 

repaint(); 

break; 

default: 

} 

} 

public void mouseEntered(MouseEvent e){} 

public void mouseExited(MouseEvent e){} 

public void mouseClicked(MouseEvent e){} 

public void actionPerformed(ActionEvent e) 

{ 

if(e.getSource()==pen)//画笔 

{toolFlag = 0;} 

if(e.getSource()==eraser)//橡皮 

{toolFlag = 1;} 

if(e.getSource()==clear)//清除 

{ 

toolFlag = 2; 

paintInfo.removeAllElements(); 

repaint(); 

} 

if(e.getSource()==drLine)//画线 

{toolFlag = 3;} 

if(e.getSource()==drCircle)//画圆 

{toolFlag = 4;} 

if(e.getSource()==drRect)//画矩形 

{toolFlag = 5;} 

if(e.getSource()==colchooser)//调色板 

{ 

Color newColor = JColorChooser.showDialog(this,"调色板",c); 

c = newColor; 

} 

if(e.getSource()==openPic)//打开图画 

{ 

openPicture.setVisible(true); 

if(openPicture.getFile()!=null) 

{ 

int tempflag; 

tempflag = toolFlag; 

toolFlag = 2 ; 

repaint(); 

try{ 

paintInfo.removeAllElements(); 

File filein = new File(openPicture.getDirectory(),openPicture.getFile()); 

picIn = new FileInputStream(filein); 

VIn = new ObjectInputStream(picIn); 

paintInfo = (Vector)VIn.readObject(); 

VIn.close(); 

repaint(); 

toolFlag = tempflag; 

} 

catch(ClassNotFoundException IOe2) 

{ 

repaint(); 

toolFlag = tempflag; 

System.out.println("can not read object"); 

} 

catch(IOException IOe) 

{ 

repaint(); 

toolFlag = tempflag; 

System.out.println("can not read file"); 

} 

} 

} 

if(e.getSource()==savePic)//保存图画 

{ 

savePicture.setVisible(true); 

try{ 

File fileout = new File(savePicture.getDirectory(),savePicture.getFile()); 

picOut = new FileOutputStream(fileout); 

VOut = new ObjectOutputStream(picOut); 

VOut.writeObject(paintInfo); 

VOut.close(); 

} 

catch(IOException IOe) 

{ 

System.out.println("can not write object"); 

} 

} 

} 

}//end paintboard 

public class Pb 

{ 

public static void main(String args[]) 

{ new paintboard("画图程序"); } 

}

GUI画图板（绘图板）设计，用Java编写程序代码！！谢谢！！

只有矩形有圆形能移动java绘图板代码，其它实现起来麻烦点java绘图板代码，办法有java绘图板代码的只是代码太多。

画圆弧改成java绘图板代码了画曲线，圆弧稍麻烦，当然方法是很简单java绘图板代码的，你可以自己思考一下。

双击13个颜色中的任意一个都会弹出颜色选择器。

有保存与打开功能。扩展名请用 .jdr

基本满足条件，细节可能不是很好，另，代码比较乱，怕不好看懂咯，呼呼。

import java.awt.*;

import java.awt.event.*;

import java.awt.geom.*;

import java.awt.image.BufferedImage;

import java.io.*;

import java.util.ArrayList;

import javax.swing.*;

import javax.swing.filechooser.FileNameExtensionFilter;

public class JDraw {

public static void main(String[] args) {

JFrame f=new JFrame();

f.setDefaultCloseOperation(3);

f.setSize(880,600);

f.setLocationRelativeTo(null);

f.getContentPane().add(M.c);

f.getContentPane().add(M.m,"South");

f.setVisible(true);

}

}

class CVS extends Component implements ComponentListener,MouseListener,MouseMotionListener{

public void componentHidden(ComponentEvent e) {}

public void componentMoved(ComponentEvent e) {}

public void componentResized(ComponentEvent e) {resized();}

public void componentShown(ComponentEvent e) {}

private void resized() {

int w=this.getWidth();

int h=this.getHeight();

tbuff=new BufferedImage(w,h,3);

makeBuff(w,h);

}

private void makeBuff(int w,int h) {

Graphics g = tbuff.getGraphics();

g.drawImage(buff,0,0,null);

g.dispose();

buff=new BufferedImage(w,h,3);

g=buff.getGraphics();

g.drawImage(tbuff,0,0,null);

g.dispose();

}

BufferedImage buff,tbuff;

CVS(){

this.addComponentListener(this);

this.addMouseListener(this);

this.addMouseMotionListener(this);

buff=new BufferedImage(1,1,3);

}

public void paint(Graphics gr){

Graphics2D g = buff.createGraphics();

g.setBackground(new Color(0xff000000,true));

g.clearRect(0,0,getWidth(),getHeight());

g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,

RenderingHints.VALUE_ANTIALIAS_ON);

M.sa.drawAll(g);

if(M.ts!=null)

M.ts.draw(g);

g.dispose();

gr.drawImage(buff,0,0,this);

gr.dispose();

}

public void mouseClicked(MouseEvent e) {}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {

M.mp(e.getPoint());

}

public void mouseReleased(MouseEvent e) {

M.mr(e.getPoint());

}

public void mouseDragged(MouseEvent e) {

M.md(e.getPoint());

}

public void mouseMoved(MouseEvent e) {}

}

class Menu extends JComponent implements MouseListener,ActionListener{

JComboBox sbox,method;

CLabel[] cl;

JCheckBox fillC,drawB;

JRadioButton fc,bc;

ButtonGroup bg;

JButton clear,up,down,save,load;

Menu(){

this.setLayout(new FlowLayout());

method=new JComboBox(new Object[]{"draw","move","erase",});

add(method);

sbox=new JComboBox(new Object[]{"Pt","Ln","Rect","Cir","Arc",});

add(sbox);

cl=new CLabel[13];

for(int i=0; icl.length; i++){

cl[i]=new CLabel();

cl[i].addMouseListener(this);

add(cl[i]);

}

fc=new JRadioButton("fc",true);

bc=new JRadioButton("bc");

bg=new ButtonGroup();

bg.add(fc);bg.add(bc);

add(fc);add(bc);

fc.setOpaque(true);

bc.setOpaque(true);

fc.setBackground(Color.white);

bc.setBackground(Color.blue);

fillC=new JCheckBox("Fill",true);

drawB=new JCheckBox("Draw",true);

fillC.addActionListener(this);

drawB.addActionListener(this);

add(fillC);add(drawB);

clear=new JButton("clear");

clear.addActionListener(this);

add(clear);

up=new JButton("zUp");

up.addActionListener(this);

add(up);

down=new JButton("zDown");

down.addActionListener(this);

add(down);

save=new JButton("Save");

save.addActionListener(this);

add(save);

load=new JButton("Load");

load.addActionListener(this);

add(load);

}

public void mouseClicked(MouseEvent e) {

JLabel l=(JLabel)e.getSource();

if(e.getClickCount()==2){

Color sc=JColorChooser.showDialog(null, "Color chooser", l.getBackground());

l.setBackground(sc);

mousePressed(e);

}

}

public void mouseEntered(MouseEvent e) {}

public void mouseExited(MouseEvent e) {}

public void mousePressed(MouseEvent e) {

Color c=((JLabel)e.getSource()).getBackground();

if(fc.isSelected())

fc.setBackground(c);

else if(bc.isSelected())

bc.setBackground(c);

M.cp();

}

public void mouseReleased(MouseEvent e) {}

public void actionPerformed(ActionEvent e) {

if(e.getSource()==clear)M.clear();

else if(e.getSource()==up)M.up();

else if(e.getSource()==down)M.down();

else if(e.getSource()==save)M.save();

else if(e.getSource()==load)M.load();

else if(e.getSource()==fillC||e.getSource()==drawB)M.cp();

}

}

class CLabel extends JLabel{

static Color[] cs={Color.red,Color.orange,Color.yellow,Color.green,Color.cyan,

Color.blue,Color.magenta,Color.magenta.brighter(),

Color.white,Color.black,Color.gray,Color.LIGHT_GRAY,Color.DARK_GRAY,};

static int i;

CLabel(){

this.setOpaque(true);

this.setBackground(cs[i++]);

this.setBorder(BorderFactory.createLineBorder(Color.black));

this.setPreferredSize(new Dimension(10,20));

}

}

class M{

static JFileChooser jfc=new JFileChooser();

static Menu m=new Menu();

static CVS c=new CVS();

static SA sa=new SA();

static S ts=null,selected=null;

static Color fc,bc;

static void clear(){

sa.ss.clear();

c.repaint();

}

public static void cp() {

System.out.println(selected);

if(selected!=null){

selected.fillColor=m.fc.getBackground();

selected.borderColor=m.bc.getBackground();

selected.fc=m.fillC.isSelected();

selected.db=m.drawB.isSelected();

c.repaint();

}

}

public static void up() {

if(selected!=null){

sa.upZ(selected);

c.repaint();

}

}

public static void down(){

if(selected!=null){

sa.downZ(selected);

c.repaint();

}

}

static{

jfc.setFileFilter(new FileNameExtensionFilter("JDraw file (*.jdraw,*.jdr)","jdr","jdraw"));

}

static void save(){

int x=jfc.showSaveDialog(c);

if(x==JFileChooser.APPROVE_OPTION){

File f = jfc.getSelectedFile();

try{

ObjectOutputStream oos=new ObjectOutputStream(new FileOutputStream(f));

oos.writeObject(sa);

oos.flush();

oos.close();

}catch(Exception e){}

}

}

static void load(){

int x=jfc.showOpenDialog(c);

if(x==JFileChooser.APPROVE_OPTION){

File f = jfc.getSelectedFile();

try{

ObjectInputStream oos=new ObjectInputStream(new FileInputStream(f));

Object r=oos.readObject();

if(r!=null){

sa=(SA)r;

c.repaint();

}

oos.close();

}catch(Exception e){e.printStackTrace();}

}

}

static int mx,my,tx,ty,ox,oy;

static int pc=0,pmax;

static int sm;

static boolean ne=true;

static int mid;

static void mp(Point p){

mid=m.method.getSelectedIndex();

if(mid==0){

if(ne){

mx=p.x;my=p.y;

pc=0;

sm=m.sbox.getSelectedIndex();

pmax=sm==4?2:1;

ne=false;

}

++pc;

}

else if(mid==1){

checkSel(p);

mx=p.x;my=p.y;

}

else if(mid==2){

checkSel(p);

if(selected!=null){

sa.ss.remove(selected);

c.repaint();

}

}

}

private static void checkSel(Point p) {

selected=null;

for(int i=sa.ss.size();i0; i--)

if(sa.ss.get(i-1).shape.contains(p)){

selected=sa.ss.get(i-1);break;

}

sa.select(selected);

c.repaint();

}

static void mt(){

Shape s=null;

int cx,cy,cw,ch;

switch(sm){

case 0:

case 2:

cx=Math.min(mx,tx);

cy=Math.min(my,ty);

cw=Math.abs(mx-tx);

ch=Math.abs(my-ty);

if(sm==0)

s=new Ellipse2D.Double(cx,cy,cw,ch);

else

s=new Rectangle(cx,cy,cw,ch);

break;

case 1:

s=new Line2D.Float(mx,my,tx,ty);

break;

case 3:

cw=Math.abs(mx-tx);

ch=Math.abs(my-ty);

int cd=(int)Math.sqrt(Math.pow(mx-tx,2)+Math.pow(my-ty,2))*2;

cx=mx-cd/2;

cy=my-cd/2;

s=new Ellipse2D.Double(cx,cy,cd,cd);

break;

case 4:

Path2D p=new Path2D.Double();

p.moveTo(mx,my);

if(pc==1){

p.lineTo(tx, ty);

}

else{

p.quadTo(ox,oy,tx,ty);

}

s=p;

break;

}

ts=new S(s,m.fc.getBackground(),m.bc.getBackground(),m.fillC.isSelected(),m.drawB.isSelected(),null);

c.repaint();

}

static void md(Point p){

if(mid==0){

if(!sa.ss.isEmpty()){

sa.ss.get(sa.ss.size()-1).sel=false;

}

if(pc1){

ox=p.x;oy=p.y;

}

else{

tx=p.x;ty=p.y;

}

mt();

}

else if(mid==1){

if(selected!=null){

moveTo(selected,p);

c.repaint();

}

}

else if(mid==2){

checkSel(p);

if(selected!=null){

sa.ss.remove(selected);

c.repaint();

}

}

}

static void moveTo(S s, Point p) {

if(s.shape instanceof Rectangle){

Rectangle r=(Rectangle)s.shape;

r.setLocation(r.x+p.x-mx,r.y+p.y-my);

mx=p.x;my=p.y;

}

else if(s.shape instanceof Ellipse2D){

Ellipse2D e=(Ellipse2D)s.shape;

e.setFrame(e.getX()+p.x-mx,e.getY()+p.y-my,e.getWidth(),e.getHeight());

mx=p.x;my=p.y;

}

}

static void mr(Point p) {

if(pc==pmax){

pc=0;

ne=true;

sa.add(ts);

selected=ts;

ts=null;

}

}

}

class S implements Serializable{

boolean fc,db,sel=true;

Shape shape;

Color fillColor,borderColor;

Stroke stroke;

static Stroke bstroke=new MyBasicStroke();

static Stroke selectStroke=new BasicStroke(1,BasicStroke.CAP_BUTT,BasicStroke.JOIN_MITER,1,new float[]{5,2},1);

S(Shape s,Color c,Color b,boolean f,boolean d,Stroke k){

this.shape=s;this.fillColor=c;this.borderColor=b;this.fc=f;this.db=d;this.stroke=k==null?bstroke:k;

}

void draw(Graphics2D g){

if(fc){

g.setColor(fillColor);

g.fill(shape);

}

if(db){

g.setColor(borderColor);

g.setStroke(stroke);

g.draw(shape);

}

if(sel){

g.setColor(Color.green);

g.setStroke(selectStroke);

g.draw(shape.getBounds());

}

}

}

class MyBasicStroke extends BasicStroke implements Serializable{}

class SA implements Serializable{

ArrayListS ss=new ArrayListS();

void add(S s){

if(s!=null){

for(S sx:ss)

sx.sel=false;

ss.add(s);

}

}

S remove(int i){

return ss.remove(i);

}

void remove(S s){

ss.remove(s);

}

void upZ(S s){

indexZ(s,1);

}

void downZ(S s){

indexZ(s,-1);

}

void indexZ(S s, int i) {

int si=ss.indexOf(s);

if(si+i0||si+iss.size()-1)return;

swap(s,ss.get(si+i));

}

void swap(S a,S b){

int ai=ss.indexOf(a);

int bi=ss.indexOf(b);

ss.set(ai,b);

ss.set(bi,a);

}

void select(S s){

for(S x:ss)

x.sel=false;

if(s!=null)

s.sel=true;

}

void drawAll(Graphics2D g){

for(S s:ss)

s.draw(g);

}

}

java 绘图板 如何实现画直线的功能

这个简单

可以调用方法drawline(int x1, int y1, int x2, int y2)

其中(x1, y1), (x2, y2)分别为直线起点和终点的坐标

特意给java绘图板代码你写了个小例子java绘图板代码，希望能帮到java绘图板代码你

***************************************

import javax.swing.*;

import java.awt.*;

public class DrawLine extends JPanel {

public static void main(String[] args) {

JFrame frame = new JFrame("DrawLine");

frame.getContentPane().add(new DrawLine());

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setSize(300, 200);

frame.setVisible(true);

}

protected void paintComponent(Graphics g) {

super.paintComponent(g);

g.drawLine(50, 50, 200, 250);

}

}

****************************

将程序复制到记事本中并改名为DrawLine.java(注意大小写)

然后在命令行中用 CD＋文件夹 使命令范围到DrawLine.java的文件夹中

然后执行命令javac DrawLine.java

再执行命令java DrawLine

你会看到结果

JAVA编译简易画图板代码

import java.applet.*;

import java.awt.*;

import java.awt.event.*;

import java.util.*;

import javax.swing.*;

import java.awt.geom.*;

import java.io.*;

class Point implements Serializable

{

int x,y;

Color col;

int tool;

int boarder;

Point(int x, int y, Color col, int tool, int boarder)

{

this.x = x;

this.y = y;

this.col = col;

this.tool = tool;

this.boarder = boarder;

}

}

class paintboard extends Frame implements ActionListener,MouseMotionListener,MouseListener,ItemListener

{

int x = -1, y = -1;

int con = 1;//画笔大小

int Econ = 5;//橡皮大小

int toolFlag = 0;//toolFlag:工具标记

//toolFlag工具对应表：

//（0--画笔）；（1--橡皮）；（2--清除）；

//（3--直线）；（4--圆）；（5--矩形）；

Color c = new Color(0,0,0); //画笔颜色

BasicStroke size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);//画笔粗细

Point cutflag = new Point(-1, -1, c, 6, con);//截断标志

Vector paintInfo = null;//点信息向量组

int n = 1;

FileInputStream picIn = null;

FileOutputStream picOut = null;

ObjectInputStream VIn = null;

ObjectOutputStream VOut = null;

// *工具面板--画笔java绘图板代码，直线java绘图板代码，圆java绘图板代码，矩形java绘图板代码，多边形,橡皮，清除*/

Panel toolPanel;

Button eraser, drLine,drCircle,drRect;

Button clear ,pen;

Choice ColChoice,SizeChoice,EraserChoice;

Button colchooser;

Label 颜色,大小B,大小E;

//保存功能

Button openPic,savePic;

FileDialog openPicture,savePicture;

paintboard(String s)

{

super(s);

addMouseMotionListener(this);

addMouseListener(this);

paintInfo = new Vector();

/*各工具按钮及选择项*/

//颜色选择

ColChoice = new Choice();

ColChoice.add("black");

ColChoice.add("red");

ColChoice.add("blue");

ColChoice.add("green");

ColChoice.addItemListener(this);

//画笔大小选择

SizeChoice = new Choice();

SizeChoice.add("1");

SizeChoice.add("3");

SizeChoice.add("5");

SizeChoice.add("7");

SizeChoice.add("9");

SizeChoice.addItemListener(this);

//橡皮大小选择

EraserChoice = new Choice();

EraserChoice.add("5");

EraserChoice.add("9");

EraserChoice.add("13");

EraserChoice.add("17");

EraserChoice.addItemListener(this);

////////////////////////////////////////////////////

toolPanel = new Panel();

clear = new Button("清除");

eraser = new Button("橡皮");

pen = new Button("画笔");

drLine = new Button("画直线");

drCircle = new Button("画圆形");

drRect = new Button("画矩形");

openPic = new Button("打开图画");

savePic = new Button("保存图画");

colchooser = new Button("显示调色板");

//各组件事件监听

clear.addActionListener(this);

eraser.addActionListener(this);

pen.addActionListener(this);

drLine.addActionListener(this);

drCircle.addActionListener(this);

drRect.addActionListener(this);

openPic.addActionListener(this);

savePic.addActionListener(this);

colchooser.addActionListener(this);

颜色 = new Label("画笔颜色",Label.CENTER);

大小B = new Label("画笔大小",Label.CENTER);

大小E = new Label("橡皮大小",Label.CENTER);

//面板添加组件

toolPanel.add(openPic);

toolPanel.add(savePic);

toolPanel.add(pen);

toolPanel.add(drLine);

toolPanel.add(drCircle);

toolPanel.add(drRect);

toolPanel.add(颜色); toolPanel.add(ColChoice);

toolPanel.add(大小B); toolPanel.add(SizeChoice);

toolPanel.add(colchooser);

toolPanel.add(eraser);

toolPanel.add(大小E); toolPanel.add(EraserChoice);

toolPanel.add(clear);

//工具面板到APPLET面板

add(toolPanel,BorderLayout.NORTH);

setBounds(60,60,900,600); setVisible(true);

validate();

//dialog for save and load

openPicture = new FileDialog(this,"打开图画",FileDialog.LOAD);

openPicture.setVisible(false);

savePicture = new FileDialog(this,"保存图画",FileDialog.SAVE);

savePicture.setVisible(false);

openPicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ openPicture.setVisible(false); }

});

savePicture.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ savePicture.setVisible(false); }

});

addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{ System.exit(0);}

});

}

public void paint(Graphics g)

{

Graphics2D g2d = (Graphics2D)g;

Point p1,p2;

n = paintInfo.size();

if(toolFlag==2)

g.clearRect(0,0,getSize().width,getSize().height);//清除

for(int i=0; in ;i++){

p1 = (Point)paintInfo.elementAt(i);

p2 = (Point)paintInfo.elementAt(i+1);

size = new BasicStroke(p1.boarder,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

g2d.setColor(p1.col);

g2d.setStroke(size);

if(p1.tool==p2.tool)

{

switch(p1.tool)

{

case 0://画笔

Line2D line1 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line1);

break;

case 1://橡皮

g.clearRect(p1.x, p1.y, p1.boarder, p1.boarder);

break;

case 3://画直线

Line2D line2 = new Line2D.Double(p1.x, p1.y, p2.x, p2.y);

g2d.draw(line2);

break;

case 4://画圆

Ellipse2D ellipse = new Ellipse2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(ellipse);

break;

case 5://画矩形

Rectangle2D rect = new Rectangle2D.Double(p1.x, p1.y, Math.abs(p2.x-p1.x) , Math.abs(p2.y-p1.y));

g2d.draw(rect);

break;

case 6://截断，跳过

i=i+1;

break;

default :

}//end switch

}//end if

}//end for

}

public void itemStateChanged(ItemEvent e)

{

if(e.getSource()==ColChoice)//预选颜色

{

String name = ColChoice.getSelectedItem();

if(name=="black")

{c = new Color(0,0,0); }

else if(name=="red")

{c = new Color(255,0,0);}

else if(name=="green")

{c = new Color(0,255,0);}

else if(name=="blue")

{c = new Color(0,0,255);}

}

else if(e.getSource()==SizeChoice)//画笔大小

{

String selected = SizeChoice.getSelectedItem();

if(selected=="1")

{

con = 1;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="3")

{

con = 3;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="5")

{con = 5;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="7")

{con = 7;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

else if(selected=="9")

{con = 9;

size = new BasicStroke(con,BasicStroke.CAP_BUTT,BasicStroke.JOIN_BEVEL);

}

}

else if(e.getSource()==EraserChoice)//橡皮大小

{

String Esize = EraserChoice.getSelectedItem();

if(Esize=="5")

{ Econ = 5*2; }

else if(Esize=="9")

{ Econ = 9*2; }

else if(Esize=="13")

{ Econ = 13*2; }

else if(Esize=="17")

{ Econ = 17*3; }

}

}

public void mouseDragged(MouseEvent e)

{

Point p1 ;

switch(toolFlag){

case 0://画笔

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p1);

repaint();

break;

case 1://橡皮

x = (int)e.getX();

y = (int)e.getY();

p1 = new Point(x, y, null, toolFlag, Econ);

paintInfo.addElement(p1);

repaint();

break;

default :

}

}

public void mouseMoved(MouseEvent e) {}

public void update(Graphics g)

{

paint(g);

}

public void mousePressed(MouseEvent e)

{

Point p2;

switch(toolFlag){

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p2 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p2);

break;

default :

}

}

public void mouseReleased(MouseEvent e)

{

Point p3;

switch(toolFlag){

case 0://画笔

paintInfo.addElement(cutflag);

break;

case 1: //eraser

paintInfo.addElement(cutflag);

break;

case 3://直线

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 4: //圆

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

case 5: //矩形

x = (int)e.getX();

y = (int)e.getY();

p3 = new Point(x, y, c, toolFlag, con);

paintInfo.addElement(p3);

paintInfo.addElement(cutflag);

repaint();

break;

default:

}

}

public void mouseEntered(MouseEvent e){}

public void mouseExited(MouseEvent e){}

public void mouseClicked(MouseEvent e){}

public void actionPerformed(ActionEvent e)

{

if(e.getSource()==pen)//画笔

{toolFlag = 0;}

if(e.getSource()==eraser)//橡皮

{toolFlag = 1;}

if(e.getSource()==clear)//清除

{

toolFlag = 2;

paintInfo.removeAllElements();

repaint();

}

if(e.getSource()==drLine)//画线

{toolFlag = 3;}

if(e.getSource()==drCircle)//画圆

{toolFlag = 4;}

if(e.getSource()==drRect)//画矩形

{toolFlag = 5;}

if(e.getSource()==colchooser)//调色板

{

Color newColor = JColorChooser.showDialog(this,"调色板",c);

c = newColor;

}

if(e.getSource()==openPic)//打开图画

{

openPicture.setVisible(true);

if(openPicture.getFile()!=null)

{

int tempflag;

tempflag = toolFlag;

toolFlag = 2 ;

repaint();

try{

paintInfo.removeAllElements();

File filein = new File(openPicture.getDirectory(),openPicture.getFile());

picIn = new FileInputStream(filein);

VIn = new ObjectInputStream(picIn);

paintInfo = (Vector)VIn.readObject();

VIn.close();

repaint();

toolFlag = tempflag;

}

catch(ClassNotFoundException IOe2)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read object");

}

catch(IOException IOe)

{

repaint();

toolFlag = tempflag;

System.out.println("can not read file");

}

}

}

if(e.getSource()==savePic)//保存图画

{

savePicture.setVisible(true);

try{

File fileout = new File(savePicture.getDirectory(),savePicture.getFile());

picOut = new FileOutputStream(fileout);

VOut = new ObjectOutputStream(picOut);

VOut.writeObject(paintInfo);

VOut.close();

}

catch(IOException IOe)

{

System.out.println("can not write object");

}

}

}

}//end paintboard

public class pb

{

public static void main(String args[])

{ new paintboard("画图程序"); }

}

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