49_GUI

<Main.java>
// JFrame = a GUI window to add components to (Look like pop out window)
import javax.swing.*;
import java.awt.*;
import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args){

        JFrame frame = new JFrame(); //creates a frame
        frame.setTitle("JFrame title goes here"); //sets title of frame
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//exit out of application
        /*         frame.setDefaultCloseOperation(JFrame.hide_ON_CLOSE); //(default) closed but still running in the background
                   frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);//prevent close
         */
        frame.setResizable(false);//prevent frame from being resized
        frame.setSize(420,420);//sets the x-dimension, and y-dimension of frame
        frame.setVisible(true);//make frame visible

        ImageIcon image = new ImageIcon("Ph.png");//create an ImageIcon; Within project holder, write name;
        frame.setIconImage(image.getImage());//Change icon of frame
        frame.getContentPane().setBackground(Color.green);//Change color of background to colour in system
        /* frame.getContentPane().setBackground(new Color(123,255,50));//Change color of background to a new colour (Red,green, blue)
            frame.getContentPane().setBackground(new Color(0xFFFFFF));//Change color of background to a new colour (Hex colour code)
            */
        new myFrame();
    }
}

<myFrame.java>
import javax.swing.*;
import java.awt.*;

public class myFrame extends JFrame {
    myFrame(){
        //Edit > Find > Replace : to replace frame to this
        this.setTitle("JFrame title goes here"); //sets title of this
        this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);//exit out of application
        /*         this.setDefaultCloseOperation(Jthis.hide_ON_CLOSE); //(default) closed but still running in the background
                   this.setDefaultCloseOperation(Jthis.DO_NOTHING_ON_CLOSE);//prevent close
         */
        this.setResizable(false);//prevent this from being resized
        this.setSize(420,420);//sets the x-dimension, and y-dimension of this
        this.setVisible(true);//make this visible

        ImageIcon image = new ImageIcon("Ph.png");//create an ImageIcon; Within project holder, write name;
        this.setIconImage(image.getImage());//Change icon of this
        this.getContentPane().setBackground(Color.green);//Change color of background to colour in system
        /* this.getContentPane().setBackground(new Color(123,255,50));//Change color of background to a new colour (Red,green, blue)
            this.getContentPane().setBackground(new Color(0xFFFFFF));//Change color of background to a new colour (Hex colour code)
            */
    }
}

>> Pop out window