JAVA SWING JPanel怎么独立成一个文件？

Question

import java.awt.BorderLayout;
import java.awt.CardLayout;
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.JPanel;
import javax.swing.JTextArea;
import javax.swing.JTextField;public class CardLayoutTest {
private JFrame jframe;
private CardLayout cardManager;
private JPanel asdJPanel,bottomJPanel, topJPanel;
private JPanel lowerJPanel1, lowerJPanel2, lowerJPanel3, lowerJPanel4,
lowerJPanel5, lowerJPanel6;
private JButton btn1, btn2, btn3, btn4, btn5, btn6;
private JTextArea jta1, jta2, jta3;
private JTextField jtf1, jtf2, jtf3; public CardLayoutTest() {
jframe = new JFrame("CardLayout测试"); cardManager = new CardLayout();
        
asdJPanel = new JPanel();
bottomJPanel = new JPanel();
topJPanel = new JPanel(); lowerJPanel1 = new JPanel();
lowerJPanel2 = new JPanel();
lowerJPanel3 = new JPanel();
lowerJPanel4 = new JPanel();
lowerJPanel5 = new JPanel();
lowerJPanel6 = new JPanel(); btn1 = new JButton("按钮一");
btn2 = new JButton("按钮二");
btn3 = new JButton("按钮三");
btn4 = new JButton("按钮四");
btn5 = new JButton("按钮五");
btn6 = new JButton("按钮六"); jta1 = new JTextArea();
jta2 = new JTextArea();
jta3 = new JTextArea();
jtf1 = new JTextField();
jtf2 = new JTextField();
jtf3 = new JTextField(); init();
addHandlers(); } private void init() {
Container c = jframe.getContentPane();
c.add(topJPanel, BorderLayout.NORTH);
c.add(bottomJPanel, BorderLayout.CENTER);
bottomJPanelInit();
topJPanelInit();
lowerJPanel1Init();
lowerJPanel2Init();
lowerJPanel3Init();
lowerJPanel4Init();
lowerJPanel5Init();
lowerJPanel6Init(); }
private void bottomJPanelInit() {
bottomJPanel.setLayout(cardManager);
bottomJPanel.add(lowerJPanel1, "按钮一");
bottomJPanel.add(lowerJPanel2, "按钮二");
bottomJPanel.add(lowerJPanel3, "按钮三");
bottomJPanel.add(lowerJPanel4, "按钮四");
bottomJPanel.add(lowerJPanel5, "按钮五");
bottomJPanel.add(lowerJPanel6, "按钮六");
} private void topJPanelInit() {
topJPanel.add(btn1);
topJPanel.add(btn2);
topJPanel.add(btn3);
topJPanel.add(btn4);
topJPanel.add(btn5);
topJPanel.add(btn6);
} private void lowerJPanel1Init() {
lowerJPanel1.setBackground(Color.BLUE);
jta1.setText("btn1----lowerJPanel1");
lowerJPanel1.add(jta1);
} private void lowerJPanel2Init() {
lowerJPanel2.setBackground(Color.CYAN);
jta2.setText("btn2----lowerJPanel2");
lowerJPanel2.add(jta2);
} private void lowerJPanel3Init() {
lowerJPanel3.setBackground(Color.GRAY);
jta3.setText("btn3----lowerJPanel3");
lowerJPanel3.add(jta3);
} private void lowerJPanel4Init() {
lowerJPanel4.setBackground(Color.GREEN);
jtf1.setText("btn4----lowerJPanel4");
lowerJPanel4.add(jtf1);
} private void lowerJPanel5Init() {
lowerJPanel5.setBackground(Color.MAGENTA);
jtf2.setText("btn5----lowerJPanel5");
lowerJPanel5.add(jtf2);
} private void lowerJPanel6Init() {
lowerJPanel6.setBackground(Color.BLACK);
jtf3.setText("btn6----lowerJPanel6");
lowerJPanel6.add(jtf3);
} public void addHandlers() {
btn1.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮一");
}
});
btn2.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮二");
}
});
btn3.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮三");
}
});
btn4.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮四");
}
});
btn5.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮五");
}
});
btn6.addActionListener(new ActionListener() { @Override
public void actionPerformed(ActionEvent e) {
cardManager.show(bottomJPanel, "按钮六");
}
});
} public void showMe() {
jframe.setSize(500, 300);
jframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
jframe.setVisible(true);
} public static void main(String[] args) {
new CardLayoutTest().showMe();
}
}
因为不可能所有面板写在一个文件里~~

Answer 1

你可以把相应的对象写在不同的文件里
然后在一个文件中创建不同JPanel的实例
再调用里面的方法进行操作

Answer 2

Public class XXX exdent JPanel{
}这样就独立一个文件了啊