Java swing如何获得系统外观？
该UIManager.getSystemLookAndFeelClassName()方法返回Swing应用程序的当前系统外观。SwingUtilities.updateComponentTreeUI()设置LAF后，请不要忘记调用该方法以更新当前应用程序的外观。
package org.nhooo.example.swing;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
public class SystemLAFDemo {
public static void main(String[] args) {
JFrame frame = new JFrame();
frame.setSize(250, 250);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.setTitle("System LAF Demo");
try {
// 将系统外观用于Swing应用程序
String className = UIManager.getSystemLookAndFeelClassName();
System.out.println("className = " + className);
UIManager.setLookAndFeel(className);
} catch (Exception e) {
e.printStackTrace();
}
SwingUtilities.updateComponentTreeUI(frame);
frame.setVisible(true);
}
}