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代码说明：

package com.wxt; import java.awt.Dimension; import java.awt.HeadlessException; import java.awt.Toolkit; import javax.swing.JFrame; import javax.swing.JLabel; import java.awt.Font; public class SuccessFrame extends JFrame { public void init( ){ setSize(500,500); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);    Toolkit tk=getToolkit();   Dimension dim=tk.getScreenSize();   int x,y;   x=((int)dim.getWidth()-500)/2;   y=((int)dim.getHeight()-500)/2;   setLocation(x,y);         } public SuccessFrame() throws HeadlessException { super(); getContentPane().setLayout(null); JLabel lblNewLabel = new JLabel("u6B22u8FCEu5149u4E34u5B66u7C4Du7BA1u7406u7CFBu7EDF2.01u7248u672C"); lblNewLabel.setFo