Java Swing - Frame

 Java Swing - Frame

package jlib5.swing;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.Image;
import java.awt.Toolkit;
import javax.swing.JComponent;
import javax.swing.JFrame;

public class Frame {

    JFrame frame;
    
    public Frame(String title) {
        frame = new JFrame(title);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
    }
    public void show(int width, int height) {
        frame.pack();
        frame.setLocationRelativeTo(null);
        moveToCenterScreen();
        frame.setSize( new Dimension(width, height));
        frame.setVisible(true);
    }
    public void setTop(JComponent node) {
        frame.getContentPane().add( node, BorderLayout.NORTH); 
    }
    public void setCenter(JComponent node) {
        frame.getContentPane().add( node, BorderLayout.CENTER); 
    }    
    public void setBottom(JComponent node) {
        frame.getContentPane().add( node, BorderLayout.SOUTH); 
    }
 
    public void setTitle(String title) { 
        frame.setTitle( title ); 
    }    
    public void setWindowIcon( Image image ) { 
        frame.setIconImage( image ); 
    }

    public void moveToCenterScreen() {
        Dimension screen = Toolkit.getDefaultToolkit().getScreenSize();
        Dimension frm = frame.getSize();
        int xpos = (int)(screen.getWidth() / 2 - frm.getWidth() / 2);
        int ypos = (int)(screen.getHeight() / 2 - frm.getHeight() / 2);
        frame.setLocation(xpos, ypos);
    }
}