package com.swing.demo; import java.awt.BorderLayout; import java.awt.Color; import java.awt.Container; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JTextArea; /** * 测试事件响应修改界面内容 * @author Administrator * */ public class ActionListenerTest { public static void main(String[] args) { ActionListenerTest instance = new ActionListenerTest(); instance.show(); } private void show() { JFrame frame = new JFrame("窗体"); Container contentPane = frame.getContentPane(); JButton btn = new JButton("按钮"); JTextArea textArea = new JTextArea(); textArea.setBackground(Color.white); textArea.setRows(10); MyActionListener listener = new MyActionListener(); listener.setBtn(btn); listener.setTextArea(textArea); btn.addActionListener(listener); contentPane.add(btn, BorderLayout.NORTH); contentPane.add(textArea, BorderLayout.SOUTH); frame.pack(); frame.setVisible(true); frame.requestFocus(); frame.setSize(400, 300); frame.setLocationRelativeTo(null); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); } private class MyActionListener implements ActionListener { private JButton btn; private JTextArea textArea; public void setBtn(JButton btn) { this.btn = btn; } public void setTextArea(JTextArea textArea) { this.textArea = textArea; } @Override public void actionPerformed(ActionEvent e) { btn.setText("hello world"); textArea.setText(textArea.getText() + "new000" + "\r\n"); } } } |
