layoutframe.java

Java实例入门

package layouttest;

import java.awt.*;
import javax.swing.*;
import javax.swing.border.*;
import java.awt.event.*;

public class LayoutFrame extends JFrame {
  GridLayout gridLayout1 = new GridLayout();
  JPanel leftPanel = new JPanel();
  JPanel rightPanel = new JPanel();
  GridLayout gridLayout2 = new GridLayout();
  GridLayout gridLayout3 = new GridLayout();
  TitledBorder titledBorder1;
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();
  JButton jButton5 = new JButton();
  JLabel jLabel1 = new JLabel();

  public LayoutFrame() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  public static void main(String[] args) {
    LayoutFrame layoutFrame = new LayoutFrame();
    layoutFrame.show();
  }
  private void jbInit() throws Exception {
    titledBorder1 = new TitledBorder("");
    this.setDefaultCloseOperation(3);
    this.setSize(new Dimension(400, 300));
    this.setTitle("布局浏览");
    gridLayout1.setColumns(2);
    this.getContentPane().setLayout(gridLayout1);
    rightPanel.setLayout(gridLayout2);
    leftPanel.setLayout(gridLayout3);
    leftPanel.setBorder(titledBorder1);
    titledBorder1.setTitle("Layout Name");
    gridLayout3.setRows(5);
    gridLayout3.setColumns(1);
    gridLayout3.setVgap(10);
    jButton1.setBackground(UIManager.getColor("Button.focus"));
    jButton1.setBorder(BorderFactory.createRaisedBevelBorder());
    jButton1.setText("FlowLayout");
    jButton1.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton1_actionPerformed(e);
      }
    });
    jButton2.setBackground(UIManager.getColor("Button.focus"));
    jButton2.setBorder(BorderFactory.createRaisedBevelBorder());
    jButton2.setText("BorderLayout");
    jButton2.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton2_actionPerformed(e);
      }
    });
    jButton3.setBackground(UIManager.getColor("Button.focus"));
    jButton3.setBorder(BorderFactory.createRaisedBevelBorder());
    jButton3.setText("CardLayout");
    jButton3.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton3_actionPerformed(e);
      }
    });
    jButton4.setBackground(UIManager.getColor("Button.focus"));
    jButton4.setBorder(BorderFactory.createRaisedBevelBorder());
    jButton4.setText("GridLayout");
    jButton4.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton4_actionPerformed(e);
      }
    });
    jButton5.setBackground(UIManager.getColor("Button.focus"));
    jButton5.setBorder(BorderFactory.createRaisedBevelBorder());
    jButton5.setText("GridBagLayout");
    jButton5.addActionListener(new java.awt.event.ActionListener() {
      public void actionPerformed(ActionEvent e) {
        jButton5_actionPerformed(e);
      }
    });
    jLabel1.setHorizontalAlignment(SwingConstants.CENTER);
    jLabel1.setText("Select a button from left");
    this.getContentPane().add(leftPanel, null);
    this.getContentPane().add(rightPanel, null);
    rightPanel.add(jLabel1, null);
    leftPanel.add(jButton1, null);
    leftPanel.add(jButton2, null);
    leftPanel.add(jButton3, null);
    leftPanel.add(jButton4, null);
    leftPanel.add(jButton5, null);
  }

  void jButton1_actionPerformed(ActionEvent e) {
    rightPanel.removeAll();
    rightPanel.add(new FlowLayoutPanel());
    rightPanel.revalidate();
    rightPanel.repaint();

  }

  void jButton2_actionPerformed(ActionEvent e) {
    rightPanel.removeAll();
    rightPanel.add(new BorderLayoutPanel());
    rightPanel.revalidate();
    rightPanel.repaint();

  }

  void jButton3_actionPerformed(ActionEvent e) {
    rightPanel.removeAll();
    rightPanel.add(new CardLayoutPanel());
    rightPanel.revalidate();
    rightPanel.repaint();

  }

  void jButton4_actionPerformed(ActionEvent e) {
    rightPanel.removeAll();
    rightPanel.add(new GridLayoutPanel());
    rightPanel.revalidate();
    rightPanel.repaint();

  }

  void jButton5_actionPerformed(ActionEvent e) {
    rightPanel.removeAll();
    rightPanel.add(new GridBagLayoutPanel());
    rightPanel.revalidate();
    rightPanel.repaint();

  }
}