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CandyBowlProblem.java
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413 lines (326 loc) · 13.2 KB
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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
6F45
+ " 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
}
}