jFrame set size

import javax.swing.JFrame;

class SizeJFrame {
    public static void main(String[] args)
    {
    	JFrame frame = new JFrame();
    	//Set width and height 
    	frame.setSize(400,500);
    	frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    	frame.setVisible(true);
    }
}

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