Java-Threading-Example1/CandyBowlProblem.java at master · sarojshakya01/Java-Threading-Example1 · GitHub

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import java.util.Random;

import java.util.Scanner;

import java.awt.event.ActionListener;

import java.awt.event.ActionEvent;

import java.awt.Color;

import java.awt.BorderLayout;

import java.awt.Dimension;

import java.awt.FlowLayout;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JLabel;

import javax.swing.JButton;

import javax.swing.JTextPane;

import javax.swing.JSplitPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

import javax.swing.JScrollPane;

import javax.swing.text.BadLocationException;

import javax.swing.text.SimpleAttributeSet;

import javax.swing.text.StyleConstants;

import javax.swing.SwingConstants;

import javax.swing.text.StyledDocument;

/* Bowl class to keep the tract of Bowl. This class has current number of candy

and maximum number of candy it has */

class Bowl {

private int mCandy, maxCandy;

public Bowl(int maxCandy) {

this.maxCandy = maxCandy;

mCandy = maxCandy; // currecnt candy is max candy when the bowl is filled initially

}

// synchronized method to accedd the Bowl by only on faculty at a time

public synchronized boolean getStatus() {

if (mCandy > 0) {

mCandy--;

notifyAll();

return true;

} else {

notifyAll();

return false;

}

// method to get the current number of candy in a bowl

public int getCandy() {

return mCandy;

}

// method to re-fill the bowl

public void Fill() {

mCandy = maxCandy;

}

/* TA class to keep the tract of TA. This class has the bowl to be filled by TA when it is empty */

class TA {

private Bowl bowl;

public TA(Bowl bowl) {

this.bowl = bowl; // initial status of the bowl

}

// method to fill the bowl by TA

public void fillBowl() {

bowl.Fill();

}

/* Faculty class to keep the tract of activities of Faculties. This class has current number of candy

in a bowl, TA, faculty names, faculty wait time etc */

class Faculty extends Thread {

private Bowl bowl;

private TA ta;

private String name;

private Random random = new Random();

private int mCandy, sleepTime;

private boolean status;

static private int maxSleepTime;

static private StyledDocument doc = CandyBowlProblem.pane.getStyledDocument();

static private SimpleAttributeSet keyWord = new SimpleAttributeSet();

public Faculty(Bowl bowl, TA ta, int maxSleepTime, String name) {

this.bowl = bowl;

this.ta = ta;

this.maxSleepTime = maxSleepTime;

this.name = name;

mCandy = 0;

StyleConstants.setForeground(keyWord, Color.WHITE);

StyleConstants.setBold(keyWord, true);

}

public void run() {

try {

while (true) {

status = bowl.getStatus();

int candy = bowl.getCandy();

if (status == false) { // Bow is empty so TA needs it to be filled

ta.fillBowl();

printInfo("\nTA filled the bowl. Now the bowl has " + candy + " candy in it.\n");

System.out.println("\nTA filled the bowl. Now the bowl has " + candy + " candy in it.\n");

} else {

mCandy++;

do {

sleepTime = random.nextInt(maxSleepTime); // generate random time bounded by maxSleepTime

} while (sleepTime == 0);

printInfo(name + " is thinking and eating a candy for " + sleepTime + " ms. Now Bowl has " + candy + " candy left.");

System.out.println(name + " thinking and eating a candy for " + sleepTime + " ms. Now Bowl has " + candy + " candy left.");

Thread.sleep(sleepTime); //wait till sleepTime

}

} catch (InterruptedException e) {

// e.printStackTrace();

} finally {

System.out.println(name + " ate " + mCandy + " piece(s) of candy.");

printInfo(name + " ate " + mCandy + " piece(s) of candy.");

}

// method to set the sleep time at run time

public void setSleepTime(int sleeptime) {

this.maxSleepTime = sleeptime;

}

// method to print the information on GUI

static public void printInfo (String info) {

int len = CandyBowlProblem.pane.getDocument().getLength();

CandyBowlProblem.pane.setCaretPosition(len);

CandyBowlProblem.pane.requestFocusInWindow();

try {

doc.insertString(doc.getLength(), "\n" + info, keyWord );

}

catch(Exception e) { System.out.println(e);

}

// main class CandyBowlProblem

public class CandyBowlProblem extends JPanel {

static private int height = 640, width = 1080;

static private int nProf = 3, mCandy = 5, maxSleepTime = 3000, runTime = 0;

static private Scanner input = new Scanner(System.in);

static private Bowl bowl = new Bowl(mCandy);

static private TA ta = new TA(bowl);

static private Faculty[] profs = new Faculty[nProf];

static JTextPane pane = new JTextPane(); // this is global to this package

static private JButton btnPlay = new JButton("Play");

static private JButton btnStop = new JButton("Stop");

static private JButton btnPlusSpeed = new JButton("Speed+");

static private JButton btnMinusSpeed = new JButton("Speed-");

static public void playGUI() {

JFrame frame = new JFrame("Candy Bowl Problem");

// btnPlay.setBounds(130,60,140,40);

// btnStop.setBounds(130,140,140,40);

// btnPlusSpeed.setBounds(130,220,140,40);

// btnMinusSpeed.setBounds(130,300,140,40);

btnPlay.setEnabled(true);

btnStop.setEnabled(false);

btnPlusSpeed.setEnabled(false);

btnMinusSpeed.setEnabled(false);

JLabel lfac = new JLabel("No of Faculties ");

JTextField nfac = new JTextField("3",6);

JLabel lcandy = new JLabel("No of Candies ");

JTextField ncandy = new JTextField("5",6);

JLabel lwaittime = new JLabel("Max wait time (ms)");

JTextField waittime = new JTextField("3000",6);

JLabel lmaxtime = new JLabel("Max run time (ms)");

JTextField maxtime= new JTextField("0",6);

// lfac.setLocation(200,200);

// lcandy.setLocation(100,200);

// lwaittime.setLocation(200,200);

// lmaxtime.setLocation(200,200);

SimpleAttributeSet attributeSet = new SimpleAttributeSet();

StyleConstants.setItalic(attributeSet, true);

StyleConstants.setForeground(attributeSet, Color.WHITE);

pane.setCharacterAttributes(attributeSet, false);

pane.setEditable(false);

JScrollPane scrollPane = new JScrollPane(pane);

pane.setPreferredSize(new Dimension(width - 100, 500));

JPanel p1 = new JPanel();

JPanel p2 = new JPanel();

p1.setPreferredSize(new Dimension(400, 540));

JScrollPane scrollableTextArea = new JScrollPane(pane);

scrollableTextArea.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS);

scrollableTextArea.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS);

pane.setBackground(Color.BLACK);

pane.setForeground(Color.WHITE);

p1.add(scrollableTextArea);

p2.add(lfac);

p2.add(nfac);

p2.add(lcandy);

p2.add(ncandy);

p2.add(lwaittime);

p2.add(waittime);

p2.add(lmaxtime);

p2.add(maxtime);

p2.add(btnPlay);

p2.add(btnPlusSpeed);

p2.add(btnMinusSpeed);

p2.add(btnStop);

JSplitPane s1 = new JSplitPane(SwingConstants.HORIZONTAL, p1, p2);

frame.add(s1);

frame.setSize(width, height);

frame.setVisible(true);

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

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

btnPlay.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent arg0) {

if (nfac.getText().length() > 0)

nProf = Integer.parseInt(nfac.getText());

if (ncandy.getText().length() > 0)

mCandy = Integer.parseInt(ncandy.getText());

if (waittime.getText().length() > 0)

maxSleepTime = Integer.parseInt(waittime.getText());

if (maxtime.getText().length() > 0)

runTime = Integer.parseInt(maxtime.getText());

Bowl bowl = new Bowl(mCandy);

TA ta = new TA(bowl);

String name;

profs = new Faculty[nProf];

for (int i = 0; i < nProf; i++) {

name = "Faculty_" + (i+1);

profs[i] = new Faculty(bowl, ta, maxSleepTime, name);

}

btnPlay.setEnabled(false);

btnPlusSpeed.setEnabled(true);

btnMinusSpeed.setEnabled(true);

btnStop.setEnabled(true);

pane.setText("ACTIVITIES:");

try {

Thread.sleep(2 * 1000);

} catch (InterruptedException ie) {

Thread.currentThread().interrupt();

}

play(profs, runTime);

}

});

btnStop.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent arg0) {

System.out.println("Stopped!");

Faculty.printInfo("Stopped!");

for (int i = 0; i < profs.length; i++) {

profs[i].interrupt();

}

btnPlay.setEnabled(true);

btnStop.setEnabled(false);

btnPlusSpeed.setEnabled(false);

btnMinusSpeed.setEnabled(false);

}

});

btnPlusSpeed.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent arg0) {

int sleeptime = 0;

if (waittime.getText().length() > 0) {

sleeptime = Integer.parseInt(waittime.getText());

sleeptime = (int)(sleeptime * 0.9); // decrease wait time by 10%

waittime.setText(Integer.toString(sleeptime));

profs[0].setSleepTime(sleeptime);

}

});

btnMinusSpeed.addActionListener(new ActionListener() {

@Override

public void actionPerformed(ActionEvent arg0) {

int sleeptime = 0;

if (waittime.getText().length() > 0) {

sleeptime = Integer.parseInt(waittime.getText());

sleeptime = (int)(sleeptime * 1.1); // increase wait time by 10%

waittime.setText(Integer.toString(sleeptime));

profs[0].setSleepTime(sleeptime);

}

});

}

private static void play(Faculty [] profs, int runTime) {

for (int i = 0; i < profs.length; i++) {

profs[i].start();

}

if (runTime > 0) {

//Sleep for this much time then exit the threads

try {

Thread.sleep(runTime);

System.out.println(runTime + " ms time is up!");

Faculty.printInfo(runTime + " ms time is up!");

for (int i = 0; i < profs.length; i++) {

profs[i].interrupt();

}

} catch (InterruptedException e) {

e.printStackTrace();

}

CandyBowlProblem.btnPlay.setEnabled(true);

CandyBowlProblem.btnStop.setEnabled(false);

CandyBowlProblem.btnPlusSpeed.setEnabled(false);

CandyBowlProblem.btnMinusSpeed.setEnabled(false);

}

private static void playCLI() {

// int nProf = 3, mCandy = 5, maxSleepTime = 3, runTime = 5;

int nProf, mCandy, maxSleepTime, runTime;

System.out.print("Enter number of faculty: ");

nProf = input.nextInt();

System.out.print("Enter Number of Candy: ");

mCandy = input.nextInt();

System.out.print("Enter max sleep time in ms: ");

maxSleepTime = input.nextInt();

System.out.print("Enter total run-time is ms: ");

runTime = input.nextInt();

System.out.print("\n\n");

Bowl bowl = new Bowl(mCandy);

TA ta = new TA(bowl);

String name;

Faculty[] profs = new Faculty[nProf];

for (int i = 0; i < nProf; i++) {

name = "Faculty_" + (i+1);

profs[i] = new Faculty(bowl, ta, maxSleepTime, name);

}

for (int i = 0; i < nProf; i++) {

profs[i].start();

}

if (runTime > 0) {

try {

Thread.sleep(runTime);

System.out.println(runTime + " ms time is up!");

for (int i = 0; i < nProf; i++) {

profs[i].interrupt();

}

} catch (InterruptedException e) {

e.printStackTrace();

}

public static void main(String[] args) {

playGUI(); // play game in GUI

// playCLI(); // play game in CLIE

}

Java-Threading-Example1/CandyBowlProblem.java at master · sarojshakya01/Java-Threading-Example1 · GitHub

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