swing 管理器二

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.BorderFactory;
import javax.swing.DefaultListModel;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class GridBagLayoutFrame extends JFrame {
 private static final long serialVersionUID = 6819222900970457455L;
 private JPanel mainPanel = new JPanel();
 private JButton addButton = new JButton();
 private JButton leftButton = new JButton();
 private JButton rightButton = new JButton();
 private JLabel label = new JLabel();
 private JTextField field = new JTextField();
 private DefaultListModel leftModel = new DefaultListModel();
 private DefaultListModel rightMOdel = new DefaultListModel();
 private JList leftList = new JList(leftModel);
 private JList rightList = new JList(rightMOdel);

 public GridBagLayoutFrame(String title) {
  setTitle("GridBagLayoutFrameDemo");
  setPreferredSize(new Dimension(600, 400));
  setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  initComponent();
  addData();
  pack();
  setVisible(true);
 }

 private static void createAndShowGUI() {
  new GridBagLayoutFrame("GridBagLayoutFrameDemo");
 }

 private void initComponent() {

  label.setText("添加选项：");
  addButton.setText("添加");
  leftList.setPreferredSize(new Dimension(150, 150));
  rightList.setPreferredSize(leftList.getPreferredSize());
  leftButton.setText("左");
  rightButton.setText("右");
  mainPanel.setBorder(BorderFactory.createTitledBorder("左右选择框"));
  mainPanel.setLayout(new GridBagLayout());

  GridBagConstraints c = new GridBagConstraints();

  c.gridx = 0; // 0行0列
  c.gridy = 0;
  c.gridwidth = 1;
  c.gridheight = 1;
  c.fill = GridBagConstraints.HORIZONTAL;
  c.weightx = 0;
  c.weighty = 0;
  mainPanel.add(label, c);

  c.gridx++;
  c.weightx = 1;
  mainPanel.add(field, c);

  c.gridx++;
  c.weightx = 0;
  c.gridwidth = 1;
  c.gridheight = 1;
  // c.fill = GridBagConstraints.HORIZONTAL;
  mainPanel.add(addButton, c);

  c.gridx = 0;
  c.gridy = 1;
  c.weightx = 1;
  c.weighty = 1;
  c.gridwidth = 2;
  c.gridheight = 2;
  c.fill = GridBagConstraints.BOTH;
  mainPanel.add(leftList, c);

  c.gridx = 2;
  c.gridy = 1;
  c.gridwidth = 1;
  c.gridheight = 1;
  c.weightx = 0;
  c.weighty = 0.5;
  c.anchor = GridBagConstraints.SOUTH;
  c.fill = GridBagConstraints.HORIZONTAL;
  mainPanel.add(leftButton, c);

  c.gridx = 2;
  c.gridy = 2;
  c.anchor = GridBagConstraints.NORTH;
  c.fill = GridBagConstraints.HORIZONTAL;
  mainPanel.add(rightButton, c);

  c.gridx = 3;
  c.gridy = 1;
  c.gridwidth = 1;
  c.gridheight = 2;
  c.weightx = 1;
  c.weighty = 1;
  c.fill = GridBagConstraints.BOTH;
  mainPanel.add(rightList, c);

  this.getContentPane().add(mainPanel);
 }

 private void addData() {
  addButton.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    addItem();
   }
  });

  leftButton.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    leftItem();
   }
  });

  rightButton.addActionListener(new ActionListener() {
   public void actionPerformed(ActionEvent e) {
    rightItem();
   }
  });
 }

 private void addItem() {
  if (field.getText() != null && !field.getText().equals("")) {
   ((DefaultListModel) leftList.getModel())
     .addElement(field.getText());
   field.setText("");
  }
 }

 private void leftItem() {
  if (rightList.getSelectedIndex() != -1) {
   Object o = rightList.getSelectedValue();
   ((DefaultListModel) rightList.getModel()).remove(rightList
     .getSelectedIndex());
   ((DefaultListModel) leftList.getModel()).addElement(o);
  }
 }

 private void rightItem() {
  if (leftList.getSelectedIndex() != -1) {
   Object o = leftList.getSelectedValue();
   ((DefaultListModel) leftList.getModel()).remove(leftList
     .getSelectedIndex());
   ((DefaultListModel) rightList.getModel()).addElement(o);
  }
 }

 public static void main(String[] args) {
  javax.swing.SwingUtilities.invokeLater(new Runnable() {
   public void run() {
    createAndShowGUI();
   }
  });
 }
}