我有一個具有面板的小程序。在面板中添加一個按鈕,點擊該按鈕將移除當前面板,並將新面板添加到當前的Applet中。如何使用ActionListener在同一個Applet中添加新面板
但我沒有得到所需的輸出!
我想從ActionListener中用新面板替換當前添加到Applet的顯示面板。
請告訴錯誤!
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JApplet;
import javax.swing.JPanel;
public class Init extends JApplet {
public Display ref;
public NewDisplay ref2;
public class Display extends JPanel implements ActionListener {
public Display() {
initComponents();
}
private void initComponents() {
jButton1 = new javax.swing.JButton();
jButton1.setText("New Game");
add(jButton1);
jButton1.addActionListener(this);
}
public javax.swing.JButton jButton1;
@Override
public void actionPerformed(ActionEvent e) {
String x = e.getActionCommand();
if (x.equals("New Game")) {
System.out.println("clicked");
//ref.setVisible(false);
this.removeAll();
//add(ref2);
add(ref2);
invalidate();
revalidate();
repaint();
}
}
}
public class NewDisplay extends JPanel {
public NewDisplay() {
setSize(800, 600);
}
@Override
public void paintComponent(Graphics g) {
g.setColor(Color.RED);
g.fillRect(0, 0, 800, 600);
}
}
@Override
public void init() {
ref = new Display();
ref2 = new NewDisplay();
add(ref);
setSize(800,600);
}
}
你是否縮小了問題範圍?例如:它是否到達actionPerformed()方法?它輸出「點擊」嗎? – 2013-03-11 20:55:08
是的,它輸出「點擊」! – Snehasish 2013-03-11 21:22:54