Description of Code:
This code will generate a pop up box that will include the text “Hello, World!” and will also include a JButton that says “Exit”. On mouse clicking the JButton, the box will terminate from the screen.

Pseudocode:

Import Java API's

Create public class HelloWorld

Create main function (String[] args) new JFrame frame "Week 1 Assignment" frame Set default close operation new JLabel label "Hello World" label set preferred size 325,100 label set to CENTER add label to frame pack frame new JPanel panel add frame to panel new JButton button “Exit” set label alignment to CENTER set button alignment to CENTER set Layout to BoxLayout set frame to visible set frame visible set frame size 350,200 add ActionListener to button

public void actionPerformed System.exit (0) – Close program upon clicking Exit button

Actual Code portion of paper:

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

public class HelloWorld
{

public static void main(String[] args) { JFrame frame = new JFrame("Week 1 Assignment"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JLabel label = new JLabel("Hello, World!"); JPanel panel = new JPanel (); JButton button = new JButton("Exit"); label.setAlignmentX(Component.CENTER_ALIGNMENT); label.setAlignmentY(Component.CENTER_ALIGNMENT); button.setAlignmentX(Component.CENTER_ALIGNMENT); button.setAlignmentY(Component.CENTER_ALIGNMENT); panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS)); panel.add(Box.createVerticalGlue()); panel.add(label); panel.add(Box.createVerticalGlue()); panel.add(button); frame.add(panel); frame.setVisible(true); frame.setSize(350,200); button.addActionListener(new ActionListener()

{ public void actionPerformed(ActionEvent e) { System.exit(0); } }); }
}