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(); }}); }}
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