你好,我实际上正在尝试从jPanel切换到我的JFrame中的另一个jPanel。我已经更改了我的代码,下面是我遵循以下内容的样子:
package testjframe;
public class TestJframe {
public static void main(String[] args) {
new MyFrame().setVisible(true);
}
}
package testjframe;
import java.awt.CardLayout;
public class MyFrame extends javax.swing.JFrame {
public MyFrame() {
initComponents();
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
mainPanel = new javax.swing.JPanel();
panel2 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
panel1 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
panel3 = new javax.swing.JPanel();
jLabel3 = new javax.swing.JLabel();
btn1 = new javax.swing.JButton();
btn2 = new javax.swing.JButton();
btn3 = new javax.swing.JButton();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
mainPanel.setLayout(new java.awt.CardLayout());
jLabel2.setText("jLabel2");
javax.swing.GroupLayout panel2Layout = new javax.swing.GroupLayout(panel2);
panel2.setLayout(panel2Layout);
panel2Layout.setHorizontalGroup(
panel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 792, Short.MAX_VALUE)
.addGroup(panel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel2Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel2)
.addGap(0, 0, Short.MAX_VALUE)))
);
panel2Layout.setVerticalGroup(
panel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 460, Short.MAX_VALUE)
.addGroup(panel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel2Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel2)
.addGap(0, 0, Short.MAX_VALUE)))
);
mainPanel.add(panel2, "card3");
jLabel1.setText("jLabel1");
javax.swing.GroupLayout panel1Layout = new javax.swing.GroupLayout(panel1);
panel1.setLayout(panel1Layout);
panel1Layout.setHorizontalGroup(
panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 792, Short.MAX_VALUE)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel1Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel1)
.addGap(0, 0, Short.MAX_VALUE)))
);
panel1Layout.setVerticalGroup(
panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 460, Short.MAX_VALUE)
.addGroup(panel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel1Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel1)
.addGap(0, 0, Short.MAX_VALUE)))
);
mainPanel.add(panel1, "card2");
jLabel3.setText("jLabel3");
javax.swing.GroupLayout panel3Layout = new javax.swing.GroupLayout(panel3);
panel3.setLayout(panel3Layout);
panel3Layout.setHorizontalGroup(
panel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 792, Short.MAX_VALUE)
.addGroup(panel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel3Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel3)
.addGap(0, 0, Short.MAX_VALUE)))
);
panel3Layout.setVerticalGroup(
panel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 460, Short.MAX_VALUE)
.addGroup(panel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(panel3Layout.createSequentialGroup()
.addGap(0, 0, Short.MAX_VALUE)
.addComponent(jLabel3)
.addGap(0, 0, Short.MAX_VALUE)))
);
mainPanel.add(panel3, "card4");
btn1.setText("1");
btn1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn1ActionPerformed(evt);
}
});
btn2.setText("2");
btn2.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn2ActionPerformed(evt);
}
});
btn3.setText("3");
btn3.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn3ActionPerformed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(mainPanel, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(layout.createSequentialGroup()
.addComponent(btn1)
.addGap(261, 261, 261)
.addComponent(btn2)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(btn3)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(mainPanel, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, 55, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btn1)
.addComponent(btn3)
.addComponent(btn2))
.addContainerGap())
);
pack();
}// </editor-fold>
private void btn1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
CardLayout card = (CardLayout)mainPanel.getLayout();
card.show(mainPanel, "panel1");
System.out.println("1");
}
private void btn2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
CardLayout card = (CardLayout) mainPanel.getLayout();
card.show(mainPanel, "panel2");
System.out.println("2");
}
private void btn3ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
CardLayout card = (CardLayout)mainPanel.getLayout();
card.show(mainPanel, "panel3");
System.out.println("3");
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(MyFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new MyFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JButton btn1;
private javax.swing.JButton btn2;
private javax.swing.JButton btn3;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel mainPanel;
private javax.swing.JPanel panel1;
private javax.swing.JPanel panel2;
private javax.swing.JPanel panel3;
// End of variables declaration
目前,您正在重新绘制面板,然后重新验证。这意味着您重新绘制它,使其看起来相同,然后删除和添加组件。在重组组件后,您需要重新绘制。
试试这个:
monPanel.removeAll();
monPanel.add(new panel1());
monPanel.revalidate();
monPanel.repaint();
我有一个,名为,布局设置为。在面板内部有三个,分别添加到、和。现在,我的要求是,如果单击Settings按钮,它将在上方显示一个透明的。这个透明的面板将包含一个不透明的,更小的,居中的面板,其中将包含设置的东西。 我知道我可以使用来实现这一点,但是查看教程,它说您只能使用绝对定位来放置不同深度的组件,我知道这是非常不鼓励的。 是否有其他方法可以做到这一点,而不使用绝对定位?
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