AWTHomework9_threads

package awtHomework9;

import java.awt.*;
import java.awt.event.*;

public class AWTHomework9 extends Frame implements WindowListener, ActionListener, Runnable {

    Panel left, right;
    Label thread1, thread2, stepLabelLeft, stepLabelRight;
    TextField leftText, rightText;
    Choice stepChoiceLeft, stepChoiceRight;
    Button startLeft, startRight, stopLeft, stopRight;

    private Thread tLeft, tRight;
    private int sumLeft, sumRight = 0;
    private boolean leftIsRunning = false, rightIsRunning = false;

    public AWTHomework9() {
        // left part
        thread1 = new Label("Thread 1");
        leftText = new TextField();
        stepLabelLeft = new Label("Step: ");
        stepChoiceLeft = new Choice();
        stepChoiceLeft.addItem("1");
        stepChoiceLeft.addItem("5");
        stepChoiceLeft.addItem("10");
        startLeft = new Button("Start");
        startLeft.addActionListener(this);
        stopLeft = new Button("Stop");
        stopLeft.addActionListener(this);
        Panel [] panels = new Panel[4];
        for(int i=0; i<4; i++) {
            panels[i] = new Panel( new GridLayout(1,0));
        }
        panels[0].add(thread1);
        panels[1].add(leftText);
        panels[2].add(stepLabelLeft);
        panels[2].add(stepChoiceLeft);
        panels[3].add(startLeft);
        panels[3].add(stopLeft);
        left = new Panel(new GridLayout(0,1));
        for(Panel x: panels){
            left.add(x);
        }

        // right part
        thread2 = new Label("Thread 2");
        rightText = new TextField();
        stepLabelRight = new Label("Step: ");
        stepChoiceRight = new Choice();
        stepChoiceRight.addItem("1");
        stepChoiceRight.addItem("5");
        stepChoiceRight.addItem("10");
        startRight = new Button("Start");
        startRight.addActionListener(this);
        stopRight = new Button("Stop");
        stopRight.addActionListener(this);
        Panel [] panels2 = new Panel[4];
        for(int i=0; i<4; i++) {
            panels2[i] = new Panel( new GridLayout(1,0));
        }
        panels2[0].add(thread2);
        panels2[1].add(rightText);
        panels2[2].add(stepLabelRight);
        panels2[2].add(stepChoiceRight);
        panels2[3].add(startRight);
        panels2[3].add(stopRight);
        right = new Panel(new GridLayout(0,1));
        for(Panel x: panels2){
            right.add(x);
        }

        //the hole thing
        setLayout( new GridLayout(1,0));
        addWindowListener(this);
        add(left);
        add(right);
        setTitle("Thread Demo");
        setSize(500, 350);
        setVisible(true);
    }

    public static void main(String[] args) {
        new AWTHomework9();
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource().equals(startLeft)) {
            if(!leftIsRunning) { //за да не се стартира повече от 1 нишка
                tLeft = new Thread( this );
                leftIsRunning = true;
                tLeft.start();
            }
        }
        if (e.getSource().equals(stopLeft)) {
            stopLeft();
        }
        if (e.getSource().equals(startRight)) {
            if(!rightIsRunning) {
                tRight = new Thread( this );
                rightIsRunning = true;
                tRight.start();
            }
        }
        if (e.getSource().equals(stopRight)) {
            stopRight();
        }
    }

    public void run() {
        if (Thread.currentThread().equals(tLeft)) {
            while(leftIsRunning) {
                try {
                    Thread.sleep(1000);
                    switch(stepChoiceLeft.getSelectedIndex()) {
                        case 0: sumLeft += 1;
                        break;
                        case 1: sumLeft += 5;
                        break;
                        case 2: sumLeft += 10;
                        break;
                    }
                    leftText.setText(""+sumLeft);
                }
                catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
        if (Thread.currentThread().equals(tRight)) {
            while(rightIsRunning) {
                try {
                    Thread.sleep(1000);
                    switch(stepChoiceRight.getSelectedIndex()) {
                        case 0: sumRight += 1;
                        break;
                        case 1: sumRight += 5;
                        break;
                        case 2: sumRight += 10;
                        break;
                    }
                    rightText.setText(""+sumRight);
                }
                catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public void stopLeft() {
        leftIsRunning = false;
    }

    public void stopRight() {
        rightIsRunning = false;
    }

    @Override
    public void windowActivated(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void windowClosed(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void windowClosing(WindowEvent e) {
        System.exit(0);

    }

    @Override
    public void windowDeactivated(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void windowDeiconified(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void windowIconified(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void windowOpened(WindowEvent arg0) {
        // TODO Auto-generated method stub

    }
}