我在做一个在框架内放入三个按钮,每当单击一个按钮时显示相应的颜色
我查阅了HTML帮助文档,但由于是初学者,关于actionPerformed的东西又
很多,所以还是不明白。
public void actionPerformed(ActionEvent e){ }
请教一下,我应在actionPerformed(应该是用这个方法吧)
方法中添加什么代码,才能实现预定功能呢???
谢谢
我查阅了HTML帮助文档,但由于是初学者,关于actionPerformed的东西又
很多,所以还是不明白。
public void actionPerformed(ActionEvent e){ }
请教一下,我应在actionPerformed(应该是用这个方法吧)
方法中添加什么代码,才能实现预定功能呢???
谢谢
* NewJFrame.java
*
* Created on 2006年4月7日, 下午6:45
*/package testwnb;
import java.awt.*;
/**
*
* @author Administrator
*/
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
// <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
jButton1 = new javax.swing.JButton();
jButton2 = new javax.swing.JButton();
jButton3 = new javax.swing.JButton();
jLabel1 = new javax.swing.JLabel(); setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jButton1.setText("\u7ea2");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
}); jPanel1.add(jButton1); jButton2.setText("\u7eff");
jButton2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton2ActionPerformed(evt);
}
}); jPanel1.add(jButton2); jButton3.setText("\u84dd");
jButton3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton3ActionPerformed(evt);
}
}); jPanel1.add(jButton3); jLabel1.setFont(new java.awt.Font("宋体", 0, 24));
jLabel1.setText("\u663e\u793a\u989c\u8272");
jLabel1.setOpaque(true);
jPanel1.add(jLabel1); getContentPane().add(jPanel1, java.awt.BorderLayout.CENTER); pack();
}
// </editor-fold> private void jButton3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO 将在此处添加您的处理代码:
jLabel1.setBackground(Color.BLUE);
} private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO 将在此处添加您的处理代码:
jLabel1.setBackground(Color.GREEN);
} private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO 将在此处添加您的处理代码:
jLabel1.setBackground(Color.RED);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
}
});
}
// 变量声明 - 不进行修改
private javax.swing.JButton jButton1;
private javax.swing.JButton jButton2;
private javax.swing.JButton jButton3;
private javax.swing.JLabel jLabel1;
private javax.swing.JPanel jPanel1;
// 变量声明结束
}