lookandfeel.java

Thinking in JAVA第四版源代码

//: gui/LookAndFeel.java
// Selecting different looks & feels.
// {Args: motif}
import javax.swing.*;
import java.awt.*;
import static net.mindview.util.SwingConsole.*;

public class LookAndFeel extends JFrame {
  private String[] choices =
    "Eeny Meeny Minnie Mickey Moe Larry Curly".split(" ");
  private Component[] samples = {
    new JButton("JButton"),
    new JTextField("JTextField"),
    new JLabel("JLabel"),
    new JCheckBox("JCheckBox"),
    new JRadioButton("Radio"),
    new JComboBox(choices),
    new JList(choices),
  };
  public LookAndFeel() {
    super("Look And Feel");
    setLayout(new FlowLayout());
    for(Component component : samples)
      add(component);
  }
  private static void usageError() {
    System.out.println(
      "Usage:LookAndFeel [cross|system|motif]");
    System.exit(1);
  }
  public static void main(String[] args) {
    if(args.length == 0) usageError();
    if(args[0].equals("cross")) {
      try {
        UIManager.setLookAndFeel(UIManager.
          getCrossPlatformLookAndFeelClassName());
      } catch(Exception e) {
        e.printStackTrace();
      }
    } else if(args[0].equals("system")) {
      try {
        UIManager.setLookAndFeel(UIManager.
          getSystemLookAndFeelClassName());
      } catch(Exception e) {
        e.printStackTrace();
      }
    } else if(args[0].equals("motif")) {
      try {
        UIManager.setLookAndFeel("com.sun.java."+
          "swing.plaf.motif.MotifLookAndFeel");
      } catch(Exception e) {
        e.printStackTrace();
      }
    } else usageError();
    // Note the look & feel must be set before
    // any components are created.
    run(new LookAndFeel(), 300, 300);
  }
} ///:~