lookandfeeldemo.java

Swing入门必看 Swing Demo

package components;
import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.event.ItemEvent;
import java.awt.event.ItemListener;
import java.util.HashMap;
import java.util.Map;

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPasswordField;
import javax.swing.JRadioButton;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.UIManager.LookAndFeelInfo;


public class LookAndFeelDemo extends JFrame {


	private static final long serialVersionUID = 1L;
	private Map<String,String> map;
	private JComboBox comboBox;
	
	public LookAndFeelDemo() {
		
		comboBox = new JComboBox();		
		map = new HashMap<String, String>();
		UIManager.LookAndFeelInfo[] feels = UIManager.getInstalledLookAndFeels();
		for (LookAndFeelInfo info : feels) {
			map.put(info.getName(), info.getClassName());
			comboBox.addItem(info.getName());
		}
		
		JLabel label = new JLabel("JLabel",SwingConstants.CENTER);
		JButton button = new JButton("JButton");
		button.setHorizontalAlignment(SwingConstants.CENTER);
		JTextField field = new JTextField("JTextField",5);
		JTextArea area = new JTextArea(5,5);
		JPasswordField psw = new JPasswordField(5);
		JRadioButton radio = new JRadioButton("JRadioButton");
		JCheckBox check = new JCheckBox("JCheckBox");

		Box box = Box.createVerticalBox();
		box.add(Box.createVerticalStrut(20));
		box.add(comboBox);
		box.add(Box.createVerticalStrut(20));
		box.add(label);
		box.add(Box.createVerticalStrut(20));
		box.add(button);
		box.add(Box.createVerticalStrut(20));
		box.add(field);
		box.add(Box.createVerticalStrut(20));
		box.add(area);
		box.add(Box.createVerticalStrut(20));
		box.add(psw);
		box.add(Box.createVerticalStrut(20));
		box.add(radio);
		box.add(Box.createVerticalStrut(20));
		box.add(check);
		box.add(Box.createVerticalStrut(20));

		comboBox.addItemListener(new ItemListener() {
			public void itemStateChanged(ItemEvent e) {
				String name = (String)comboBox.getSelectedItem();
				String className = map.get(name);
				try {
					UIManager.setLookAndFeel(className);//UnsupportedLookandFeelException
					SwingUtilities.updateComponentTreeUI(LookAndFeelDemo.this);
				} catch (Exception e1) {
					e1.printStackTrace();
				}
			}
		});
		
		Container container = getContentPane();
		container.setLayout(new FlowLayout());
		container.add(box);
		
		setSize(300,500);
		setVisible(true);
	}

	public static void main(String[] args) {
		
		LookAndFeelDemo application = new LookAndFeelDemo();
		application.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);


	}

}