Simple program of JFrame

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 //JFrame class

import java.awt.*;
import javax.swing.*;

class jframe1 extends JFrame
{
    jframe1(String title)
    {
        super(title);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    }
    public static void main(String[] args) {
        jframe1 obj = new jframe1("jframe1");
        obj.setSize(200, 200);
        obj.setVisible(true);
    }
}

OUTPUT:



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