Help! about the thread and synchronize

Question

I have worked on this assignment two days but I just can't get the answer it required
the src code is given below. Have to modify those codez using the semaphore.java which included in the zip to get the output written in test.out.txt(also in the zip)
http://adri.justmine.org/243.zip
can anyone help me on this? the assignment is due tommorrow, and I am already mad......

Answer 1

Sorry about that.
Here is the src codes
import java.util.*;
*************** Hamlet.java **************************
class Hamlet extends Thread
public Hamlet() {
public void run() {
System.out.println("HAMLET: Armed, say you?");
System.out.println("HAMLET: From top to toe?");
System.out.println("HAMLET: If it assume my noble father's person");
System.out.println(" I'll speak to it, though hell itself should gape");
System.out.println(" And bid me hold my peace.");
*****************Marcellus.java******************************
import java.util.*;
class Marcellus extends Thread
public Marcellus() {
public void run() {
System.out.println("MARCELLUS: Armed, my lord.");
System.out.println("MARCELLUS: My lord, from head to foot.");
****************Bernardo.java**********************
import java.util.*;
class Bernardo extends Thread
public Bernardo() {
public void run() {
System.out.println("BERNARDO: Armed, my lord.");
System.out.println("BERNARDO: My lord, from head to foot.");
***************Semaphore.java*****************************
public class Semaphore
public Semaphore(int v) {
     value = v;
public synchronized void P() {
     while (value <= 0) {
     try {
          wait();
     catch (InterruptedException e) { }
     value--;
public synchronized void V() {
     ++value;
     notify();
private int value;
***************CurtainUp.java***************
import java.util.*;
import Hamlet;
import Bernardo;
import Marcellus;
public class CurtainUp
public CurtainUp(int hprior, int bprior, int mprior) {
     Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
     // Create the actor threads
     Hamlet hamletThread = new Hamlet();
     Bernardo bernardoThread = new Bernardo();
     Marcellus marcellusThread = new Marcellus();
     // Now set the priorities of the actor threads
     hamletThread.setPriority(hprior);
     bernardoThread.setPriority(bprior);
     marcellusThread.setPriority(mprior);
     hamletThread.start();
     bernardoThread.start();
     marcellusThread.start();
public static void main(String args[]) {
     // Check to make sure that three arguments are passed in for thread
     // priorities, and make sure that the numbers are within the right range.
     // If they are, create an instance of CurtainUp.
     if (args.length == 3) {
     int hprior = Integer.parseInt(args[0]);
     int bprior = Integer.parseInt(args[1]);
     int mprior = Integer.parseInt(args[2]);
     if ((hprior >= Thread.MIN_PRIORITY && hprior <= Thread.MAX_PRIORITY) &&
          (bprior >= Thread.MIN_PRIORITY && bprior <= Thread.MAX_PRIORITY) &&
          (mprior >= Thread.MIN_PRIORITY && mprior <= Thread.MAX_PRIORITY)) {
          CurtainUp curtainUp = new CurtainUp(hprior, bprior, mprior);
     else {
          System.err.println("Range of priorities 1-10 inclusive");
     else {
     System.err.println("useage: Curtainup <priority1> <priority2> <priority3>");
********************tThe output *************************
java CurtainUp N1 N2 N3where N1, N2, N3 are numbers between 1 and 10 inclusive.
In your program output:
1. The order in which Bernardo and Marcellus deliver a shared line
should depend on which actor has higher priority. E.g.
java CurtainUp 1 1 2HAMLET: Armed, say you?
MARCELLUS: Armed, my lord.
BERNARDO: Armed, my lord.
HAMLET: From top to toe?
MARCELLUS: My lord, from head to foot.
BERNARDO: My lord, from head to foot.
HAMLET: If it assume my noble father's person
I'll speak to it, though hell itself should gape
And bid me hold my peace.
java CurtainUp 1 2 1HAMLET: Armed, say you?
BERNARDO: Armed, my lord.
MARCELLUS: Armed, my lord.
HAMLET: From top to toe?
BERNARDO: My lord, from head to foot.
MARCELLUS: My lord, from head to foot.
HAMLET: If it assume my noble father's person
I'll speak to it, though hell itself should gape
And bid me hold my peace.
2. If Bernardo and Marcellus have equal priority, it doesn't matter
which one goes first. E.g.
java CurtainUp 9 1 1HAMLET: Armed, say you?
MARCELLUS: Armed, my lord.
BERNARDO: Armed, my lord.
HAMLET: From top to toe?
BERNARDO: My lord, from head to foot.
MARCELLUS: My lord, from head to foot.
HAMLET: If it assume my noble father's person
I'll speak to it, though hell itself should gape
And bid me hold my peace.
3. Changing the priority of Hamlet in relation to the priorities of
Bernardo and Marcellus doesn't make any difference to the order in
which Hamlet speaks his lines. E.g.
java CurtainUp 9 2 1HAMLET: Armed, say you?
BERNARDO: Armed, my lord.
MARCELLUS: Armed, my lord.
HAMLET: From top to toe?
BERNARDO: My lord, from head to foot.
MARCELLUS: My lord, from head to foot.
HAMLET: If it assume my noble father's person
I'll speak to it, though hell itself should gape
And bid me hold my peace.
java CurtainUp 9 1 2HAMLET: Armed, say you?
MARCELLUS: Armed, my lord.
BERNARDO: Armed, my lord.
HAMLET: From top to toe?
MARCELLUS: My lord, from head to foot.
BERNARDO: My lord, from head to foot.
HAMLET: If it assume my noble father's person
I'll speak to it, though hell itself should gape
And bid me hold my peace.