IntelliJ IDEA快捷键：Ctrl+Shift+空格

The smart type code completion may be used after the new keyword,to instantiate an object of the expected type.For example,type StringBuffer buffer = new and press Ctrl+Shift+空格:StringBuffer buffer = new StringBuffer();

可以在new关键字之后使用智能类型代码完成来实例化期望类型的对象。例如，键入StringBuffer buffer = new并按Ctrl + Shift +空格：StringBuffer buffer = new StringBuffer();