java按键事件怎么执行两次_java一个按钮重复调用,按一次执行代码一次,按第二次,它执行两次,按第三次,执行了三次。。。...
bn5.addActionListener(newActionListener(){@OverridepublicvoidactionPerformed(ActionEvente3){Stringstr1=tf4.getText();Stringstr2=tf5.getText();if(0!=str1.length()&&0!=str2...bn5.addActionListen...