Java Frame在中间显示

Java Frame在中间显示

import java.awt.*;

....   

public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                
                NewJFrame f =new  NewJFrame();
                Dimension   screenSize   =            Toolkit.getDefaultToolkit().getScreenSize();  
                Dimension   frameSize   =   f.getSize();  
                if   (frameSize.height   >   screenSize.height)   {  
                 frameSize.height   =   screenSize.height;  
                 }  
                if   (frameSize.width   >   screenSize.width)   {  
                       frameSize.width   =   screenSize.width;  
                }  
                f.setLocation((screenSize.width   -   frameSize.width)   /   2, (screenSize.height   -   frameSize.height)   /   2);  
                f.setVisible(true);  
                
                //new NewJFrame().setVisible(true);
            }
        });