左边窗口内容复制到右边窗口--简单

package copy.com;

import java.awt.BorderLayout;

import java.awt.event.*;

import java.awt.Color;

import java.awt.GridLayout;

import java.awt.event.ActionEvent;

import javax.swing.*;

import javax.swing.JFrame;

import javax.swing.JTextField;

import javax.swing.JButton;

public class copy extends JFrame{

  JButton b;

  JTextField L,R;

  public void display()

  {

    JPanel f=new JPanel(new GridLayout(1,2));

    f.setSize(300,100);

    f.setBackground(Color.lightGray);

    L=new JTextField();

    R=new JTextField();

    f.add(L);

    f.add(R);

    b=new JButton("复制");

    this.add(f);

    this.add(b,BorderLayout.SOUTH);

    this.setTitle("复制");

    this.setBounds(300,200,380,120);

    this.setDefaultCloseOperation(EXIT_ON_CLOSE);

    this.setVisible(true);

    b.addActionListener(new ActionListener()

    {

      public void actionPerformed(ActionEvent e)

      {

        String str=L.getText();  //读取左边字符

        R.setText(str);   //左边字符复制到右边

      }

    });

  }

  public static void main(String []args)

  {

    copy m=new copy();

    m.display();

  }

}

运行结果:

原文地址:https://www.cnblogs.com/duanqibo/p/11134025.html