CS361Lecture1

Tyheir Brooks
Exercise 1
___________________________ ___________________________ ___________________________ _________________________

import java.awt.BorderLayout;
import java.awt.EventQueue;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JTextField;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.Color;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;

public class Main extends JFrame {

    private JPanel contentPane;
    private JTextField opA;
    private JTextField opB;
    private JTextField result;
    private JButton myButton_1;
    private JButton myButton_2;
    private JButton myButton_3;
    private JButton myButton_4;

    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Main frame = new Main();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    /**
     * Create the frame.
     */
    public Main() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBackground(Color.LIGHT_GRAY);
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        opA = new JTextField();
        opA.setBounds(34, 79, 52, 45);
        contentPane.add(opA);
        opA.setColumns(10);

        opB = new JTextField();
        opB.setBounds(146, 79, 52, 45);
        contentPane.add(opB);
        opB.setColumns(10);

        JButton myButton = new JButton("=");
        myButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String x = opA.getText();
                String y = opB.getText();
                int a = Integer.parseInt(x);
                int b = Integer.parseInt(y);
                int c = a + b;
                result.setText("" + c);
            }
        });
        myButton.setForeground(Color.BLACK);
        myButton.setBackground(Color.GREEN);
        myButton.setBounds(216, 88, 35, 29);
        contentPane.add(myButton);

        result = new JTextField();
        result.setBounds(263, 85, 57, 33);
        contentPane.add(result);
        result.setColumns(10);

        myButton_1 = new JButton("+");
        myButton_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String x = opA.getText();
                String y = opB.getText();
                int a = Integer.parseInt(x);
                int b = Integer.parseInt(y);
                int c = a + b;
                if (b==0)
                    result.setText("undef");
                else
                result.setText("" + c);
            }
        });
        myButton_1.setForeground(Color.BLACK);
        myButton_1.setBackground(Color.GREEN);
        myButton_1.setBounds(98, 88, 35, 29);
        contentPane.add(myButton_1);

        myButton_2 = new JButton("-");
        myButton_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String x = opA.getText();
                String y = opB.getText();
                int a = Integer.parseInt(x);
                int b = Integer.parseInt(y);
                int c = a - b;
                result.setText("" + c);
            }
        });
        myButton_2.setForeground(Color.BLACK);
        myButton_2.setBackground(Color.GREEN);
        myButton_2.setBounds(98, 129, 35, 29);
        contentPane.add(myButton_2);

        myButton_3 = new JButton("*");
        myButton_3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String x = opA.getText();
                String y = opB.getText();
                int a = Integer.parseInt(x);
                int b = Integer.parseInt(y);
                int c = a * b;
                result.setText("" + c);
            }
        });
        myButton_3.setForeground(Color.BLACK);
        myButton_3.setBackground(Color.GREEN);
        myButton_3.setBounds(98, 170, 35, 29);
        contentPane.add(myButton_3);

        myButton_4 = new JButton("/");
        myButton_4.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                String x = opA.getText();
                String y = opB.getText();
                if (y=="0")
                    result.setText("undef");
                else {
                int a = Integer.parseInt(x);
                int b = Integer.parseInt(y);
                int c = a / b;
                result.setText("" + c);}
            }
        });
        myButton_4.setForeground(Color.BLACK);
        myButton_4.setBackground(Color.GREEN);
        myButton_4.setBounds(98, 211, 35, 29);
        contentPane.add(myButton_4);
    }
}


Exercise 2
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public class Main {
    public static void main(String args[])
    {
        ThreadA thd1 = new ThreadA();
        ThreadB thd2 = new ThreadB();
        ThreadC thd3 = new ThreadC();
        thd1.start();
        thd2.start();
        thd3.start();
        System.out.println("I am the Main thread");
    }
}
/*
I am Tyheir
I am ThreadB
I am the Main thread
I am ThreadA

I am ThreadA
I am Tyheir
I am ThreadB
I am the Main thread

I am ThreadB
I am Tyheir
I am ThreadA
I am the Main thread


*/


public class ThreadA extends Thread {
    public void run()
    {
        System.out.println("I am ThreadA");
    }
}


public class ThreadB extends Thread{
    public void run()
    {
        System.out.println("I am ThreadB ");
    }
}


public class ThreadC extends Thread{
    public void run()
    {
        System.out.println("I am Tyheir");
    }
}