一个很弱智的事件处理问题,进来看看有多弱智嘿嘿

红烧蹄膀饭 2008-02-24 05:35:44

import java.awt.*;
import javax.swing.*;
import java.awt.event.*;

class textDemo extends JFrame{

public textDemo(String title){
super(title);

Container c=getContentPane();
c.setLayout(new FlowLayout());
JRadioButton rad1=new JRadioButton("我");
c.add(rad1);
JRadioButton rad2=new JRadioButton("你");
c.add(rad2);
JButton jb=new JButton("统计下");

jb.addMouseListener(new MouseAdapter()
{
public void mouseClicked(MouseEvent e){
JRadioButton rad1=new JRadioButton("我");
if(rad1.isSelected()){
rad1.setText("hello");
}
}
});

c.add(jb);
setSize(300,250);
setVisible(true);
}
public static void main(String args[])
{
textDemo td=new textDemo("测试下");

}
}

为什么点击按钮文本却没有改变呢?,给个答案吧

...全文

83 2 打赏收藏转发到动态举报

写回复

用AI写文章

2 条回复

切换为时间正序

请发表友善的回复…

发表回复

magic256 2008-02-24

打赏
举报

紫竹前辈正解。。。。

老紫竹 2008-02-24

打赏
举报

1 在内部匿名类，你不能再构造一次了，应该使用父类的。
2 内部类只能使用父类的类一级变量或者final的局部变量

package test.swing;



import java.awt.Container;

import java.awt.FlowLayout;

import java.awt.event.MouseAdapter;

import java.awt.event.MouseEvent;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JRadioButton;



class TextDemo extends JFrame {



  public TextDemo(String title) {

    super(title);

    Container c = getContentPane();

    c.setLayout(new FlowLayout());

    final JRadioButton  rad1 = new JRadioButton("我");

    c.add(rad1);

    JRadioButton rad2 = new JRadioButton("你");

    c.add(rad2);

    JButton jb = new JButton("统计下");

    jb.addMouseListener(new MouseAdapter() {

      public void mouseClicked(MouseEvent e) {

        System.out.println("1");

        // JRadioButton rad1 = new JRadioButton("我");

        if (rad1.isSelected()) {

          rad1.setText("hello");

        }

      }

    });

    c.add(jb);

    setSize(300, 250);

    setVisible(true);

  }



  public static void main(String args[]) {

    TextDemo td = new TextDemo("测试下");

  }

}