//TestGUISwing1.java
//Just create and show a JFrame.
//Size is the default obtained by calling pack().

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

public class TestGUISwing1
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing2.java
//Just create and show a JFrame.
//Size is determined by setting a specific width and height.

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

public class TestGUISwing2
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.setSize(600, 300);
        frame.setVisible(true);
        //frame.show();  //Can use this line in place of one above.
    }
}


//TestGUISwing3.java
//Add two buttons to a panel and add a panel to the frame.

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

public class TestGUISwing3
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        JPanel panel = new JPanel();
        panel.add(b1);
        panel.add(b2);
        frame.getContentPane().add(panel);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing4.java
//Add two buttons to a panel and add a panel to the frame.
//Then add another button to the frame.

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

public class TestGUISwing4
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        frame.getContentPane().add(panel);
        
        JButton b3 = new JButton("Third");
        frame.getContentPane().add(b3);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing5.java
//First, set the layout of the frame to FlowLayout.
//Then add two buttons to a panel and add a panel to the frame.
//Then add another button to the frame.

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

public class TestGUISwing5
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        frame.getContentPane().setLayout(new FlowLayout());

        JPanel panel = new JPanel();
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        frame.getContentPane().add(panel);
        
        JButton b3 = new JButton("Third");
        frame.getContentPane().add(b3);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing6.java
//Add two buttons to a panel and add a panel to the frame.
//Then add another button to the frame, but make use of the
//fact that the default layout is BorderLayout to position
//this third button in the WEST position of the border layout.

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

public class TestGUISwing6
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        frame.getContentPane().add(panel);
        
        JButton b3 = new JButton("Third");
        frame.getContentPane().add(b3, BorderLayout.WEST);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing7.java
//Add two buttons to a panel and add a panel to the frame.
//Then add another button to the frame, but make use of the
//fact that the default layout is BorderLayout to position
//this third button in the CENTER position of the border layout.

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

public class TestGUISwing7
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        frame.getContentPane().add(panel);
        
        JButton b3 = new JButton("Third");
        frame.getContentPane().add(b3, BorderLayout.CENTER);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing8.java
//This time add a button first, then the panel with two buttons.

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

public class TestGUISwing8
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        
        JButton b3 = new JButton("Third");
        frame.getContentPane().add(b3);

        frame.getContentPane().add(panel);

        frame.pack();
        frame.show();
    }
}


//TestGUISwing9.java
//Show some color and additional layout features.
//Also note the use of setOpaque for the label.

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

public class TestGUISwing9
{
    public static void main(String[] args)
    {
        JFrame frame = new JFrame("My JFrame");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel();
        panel.setBackground(Color.YELLOW);
        JButton b1 = new JButton("First");
        JButton b2 = new JButton("Second");
        panel.add(b1);
        panel.add(b2);
        panel.setBorder(BorderFactory.createEmptyBorder(30, //top
                                                        30, //left
                                                        10, //bottom
                                                        30) //right
                       );
 
        
        JButton b3 = new JButton("Third");
        b3.setBackground(Color.WHITE);

        JLabel label = new JLabel("Center", SwingConstants.CENTER);
        label.setOpaque(true);
        label.setBackground(Color.CYAN);

        frame.getContentPane().add(panel, BorderLayout.NORTH);
        frame.getContentPane().add(b3, BorderLayout.SOUTH);
        frame.getContentPane().add(label, BorderLayout.CENTER);

        frame.pack();
        frame.show();
    }
}