import java.awt.Font;
import java.util.Enumeration;

import javax.swing.UIManager;
import javax.swing.plaf.FontUIResource;

/**
 * 统一设置字体，父界面设置之后，所有由父界面进入的子界面都不需要再次设置字体
 */

public class SetPersonalFont {
	public void InitGlobalFont(Font font) {
		FontUIResource globalFont = new FontUIResource(font);
		for (Enumeration<Object> keys = UIManager.getDefaults().keys(); keys
				.hasMoreElements();) {
			Object key = keys.nextElement();
			Object value = UIManager.get(key);
			if (value instanceof FontUIResource) {
				UIManager.put(key, globalFont);
			}
		}
	}
}

//main方法部分代码：

SetPersonalFont setfont = new SetPersonalFont();
		setfont.InitGlobalFont(new Font("monspaced", Font.PLAIN, 13));
		MainFrame main = new MainFrame();
		main.setVisible(true);