javaアプレットのSwingコンポーネント

Swingコンポーネント
現在設定されているLook&Feelとは別のLook&Feelを設定する方法→UIManagerクラスで用意されている「setLookAndFeel」メソッドを使う。

import javax.swing.*;
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.*;
import java.util.Vector;

public class UIManagerTest3 extends JFrame implements ActionListener{

public static void main(String[] args){
UIManagerTest3 frame = new UIManagerTest3();

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setBounds(10, 10, 450, 300);
frame.setTitle("タイトル");
frame.setVisible(true);
}

UIManagerTest3(){

JButton btn1 = new JButton("Metal");
JButton btn2 = new JButton("CDE/Motif");
JButton btn3 = new JButton("Windows");
JButton btn4 = new JButton("WindowsClassic");

btn1.addActionListener(this);
btn1.setActionCommand("javax.swing.plaf.metal.MetalLookAndFeel");
btn2.addActionListener(this);
btn2.setActionCommand("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
btn3.addActionListener(this);
btn3.setActionCommand("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
btn4.addActionListener(this);
btn4.setActionCommand("com.sun.java.swing.plaf.windows.WindowsClassicLookAndFeel");

JPanel buttonPanel = new JPanel();
buttonPanel.add(btn1);
buttonPanel.add(btn2);
buttonPanel.add(btn3);
buttonPanel.add(btn4);

String[] listData = {"Blue", "Green", "Red", "Whit", "Black", "Yellow"};
JList list = new JList(listData);
JScrollPane scrollPane1 = new JScrollPane();
scrollPane1.getViewport().setView(list);
scrollPane1.setPreferredSize(new Dimension(200, 80));

JPanel listPanel = new JPanel();
listPanel.add(scrollPane1);

JCheckBox checkBox1 = new JCheckBox("JCheckBox1");
JCheckBox checkBox2 = new JCheckBox("JCheckBox2", true);

JPanel checkPanel = new JPanel();
checkPanel.add(checkBox1);
checkPanel.add(checkBox2);

Vector<String> vector = new Vector<String>();
for (int i = 0 ; i < 10 ; i++){
StringBuffer sb = new StringBuffer();
sb.append("JTree Node");
sb.append(i);
vector.add(new String(sb));
}

JTree tree = new JTree(vector);
tree.setRootVisible(true);
JScrollPane scrollPane2 = new JScrollPane();
scrollPane2.getViewport().setView(tree);
scrollPane2.setPreferredSize(new Dimension(200, 80));

JPanel treePanel = new JPanel();
treePanel.add(scrollPane2);

JPanel p = new JPanel();
p.setLayout(new BoxLayout(p, BoxLayout.Y_AXIS));
p.add(listPanel);
p.add(checkPanel);
p.add(treePanel);

getContentPane().add(p, BorderLayout.CENTER);
getContentPane().add(buttonPanel, BorderLayout.PAGE_END);
}

public void actionPerformed(ActionEvent e){
String lafClassName = e.getActionCommand();

try{
UIManager.setLookAndFeel(lafClassName);
SwingUtilities.updateComponentTreeUI(this);
}catch(Exception ex){
System.out.println("Error L&F Setting");
}
}
}