Erstellen Sie zwei Threads, einen ungeraden und andere gerade Zahlen
Ich versuche, zwei Threads zu erstellen, eine Thread-Anzeige sogar ganze Zahlen von 0 bis 10, ein Thread ungerade ganze Zahlen von 1 bis 11. Ist der folgende Code für die Gestaltung dieses Programms geeignet?
public class Mythread {
public static void main(String[] args) {
Runnable r = new Runnable1();
Thread t = new Thread(r);
t.start();
Runnable r2 = new Runnable2();
Thread t2 = new Thread(r2);
t2.start();
}
}
class Runnable2 implements Runnable{
public void run(){
for(int i=0;i<11;i++){
if(i%2 == 1)
System.out.println(i);
}
}
}
class Runnable1 implements Runnable{
public void run(){
for(int i=0;i<11;i++){
if(i%2 == 0)
System.out.println(i);
}
}
}
Ich würde nur ein paar Details ändern (hier müssen Sie nicht den Modulo-Operator verwenden ...):
public class Mythread {
public static void main(String[] args) {
Runnable r = new Runnable1();
Thread t = new Thread(r);
Runnable r2 = new Runnable2();
Thread t2 = new Thread(r2);
t.start();
t2.start();
}
}
class Runnable2 implements Runnable{
public void run(){
for(int i=0;i<11;i+=2) {
System.out.println(i);
}
}
}
class Runnable1 implements Runnable{
public void run(){
for(int i=1;i<=11;i+=2) {
System.out.println(i);
}
}
}
@aymeric answer druckt die Zahlen nicht in ihrer natürlichen Reihenfolge aus, aber dieser Code wird angezeigt. Erklärung am Ende.
public class Driver {
static Object lock = new Object();
public static void main(String[] args) {
Thread t1 = new Thread(new Runnable() {
public void run() {
for (int itr = 1; itr < 51; itr = itr + 2) {
synchronized (lock) {
System.out.print(" " + itr);
try {
lock.notify();
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
});
Thread t2 = new Thread(new Runnable() {
public void run() {
for (int itr = 2; itr < 51; itr = itr + 2) {
synchronized (lock) {
System.out.print(" " + itr);
try {
lock.notify();
if(itr==50)
break;
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
});
try {
t1.start();
t2.start();
t1.join();
t2.join();
System.out.println("\nPrinting over");
} catch (Exception e) {
}
}
}
Um dies zu erreichen, müssen die Laufmethoden der beiden obigen Threads nacheinander aufgerufen werden, d. H. Sie müssen synchronisiert werden, und ich erreiche dies mit Sperren.
Der Code funktioniert folgendermaßen: t1.run gibt die ungerade Zahl aus und benachrichtigt alle wartenden Threads, dass die Sperre aufgehoben wird, und wechselt in einen Wartezustand.
Zu diesem Zeitpunkt wird t2.run aufgerufen, es gibt die nächste gerade Zahl aus, benachrichtigt andere Threads darüber, dass die Sperrung aufgehoben wird, und hält sich im Wartezustand auf.
Dies geht so weiter, bis der itr in t2.run () 50 erreicht hat. Zu diesem Zeitpunkt ist unser Ziel erreicht und wir müssen diese beiden Threads abtöten.
Durch das Brechen vermeide ich das Aufrufen von lock.wait () in t2.run, und der Thread t2 wird heruntergefahren. Die Steuerung wechselt nun zu t1.run, da sie darauf wartete, die Sperre abzurufen. Hier ist der Wert von itr> 51, und wir werden aus run () herauskommen und so den Thread abschalten.
Wenn break nicht in t2.run () verwendet wird, werden zwar die Nummern 1 bis 50 auf dem Bildschirm angezeigt, die beiden Threads geraten jedoch in eine Deadlock-Situation und befinden sich weiterhin im Wartezustand.
package javaapplication45;
public class JavaApplication45 extends Thread {
public static void main(String[] args) {
//even numbers
Thread t1 = new Thread() {
public void run() {
for (int i = 1; i <= 20; i++) {
if (i % 2 == 0) {
System.out.println("even thread " + i);
}
}
}
};
t1.start();
//odd numbers
Thread t2 = new Thread() {
public void run() {
for (int i = 1; i <= 20; i++) {
if (i % 2 != 0) {
System.out.println("odd thread " + i);
}
}
}
};
t2.start();
}
}
Nachfolgend finden Sie den Code, der die Sperre für ein gemeinsames Objekt verwendet, dessen Nummer gedruckt werden soll. Sie garantiert die Reihenfolge auch im Gegensatz zur obigen Lösung.
public class MultiThreadPrintNumber {
int i = 1;
public synchronized void printNumber(String threadNm) throws InterruptedException{
if(threadNm.equals("t1")){
if(i%2 == 1){
System.out.println(Thread.currentThread().getName()+"--"+ i++);
notify();
} else {
wait();
}
} else if(threadNm.equals("t2")){
if(i%2 == 0){
System.out.println(Thread.currentThread().getName()+"--"+ i++);
notify();
} else {
wait();
}
}
}
public static void main(String[] args) {
final MultiThreadPrintNumber obj = new MultiThreadPrintNumber();
Thread t1 = new Thread(new Runnable() {
@Override
public void run() {
try {
while(obj.i <= 10){
obj.printNumber(Thread.currentThread().getName());
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("done t1");
}
});
Thread t2 = new Thread(new Runnable() {
@Override
public void run() {
try {
while(obj.i <=10){
obj.printNumber(Thread.currentThread().getName());
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("done t2");
}
});
t1.setName("t1");
t2.setName("t2");
t1.start();
t2.start();
}
}
Die Ausgabe sieht folgendermaßen aus: T1--1 T2-2 T1--3 T2--4 T1--5 .t1-7 t2-8 t1-9 t2--10 erledigt t2 erledigt t1
Ja, es ist gut. Aber in diesem Fall glaube ich nicht, dass Sie 2 Threads brauchen, da die Bedienung einfach ist. Wenn Sie jedoch Threads üben, ist dies in Ordnung
Gleichzeitiges Paket:
import Java.util.concurrent.ExecutorService;
import Java.util.concurrent.Executors;
import Java.util.concurrent.Future;
import Java.util.concurrent.locks.Condition;
import Java.util.concurrent.locks.Lock;
import Java.util.concurrent.locks.ReentrantLock;
//=========== Task1 class prints odd =====
class TaskClass1 implements Runnable
{
private Condition condition;
private Lock lock;
boolean exit = false;
int i;
TaskClass1(Condition condition,Lock lock)
{
this.condition = condition;
this.lock = lock;
}
@Override
public void run() {
try
{
lock.lock();
for(i = 1;i<11;i++)
{
if(i%2 == 0)
{
condition.signal();
condition.await();
}
if(i%2 != 0)
{
System.out.println(Thread.currentThread().getName()+" == "+i);
}
}
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally
{
lock.unlock();
}
}
}
//==== Task2 : prints even =======
class TaskClass2 implements Runnable
{
private Condition condition;
private Lock lock;
boolean exit = false;
TaskClass2(Condition condition,Lock lock)
{
this.condition = condition;
this.lock = lock;
}
@Override
public void run() {
int i;
// TODO Auto-generated method stub
try
{
lock.lock();
for(i = 2;i<11;i++)
{
if(i%2 != 0)
{
condition.signal();
condition.await();
}
if(i%2 == 0)
{
System.out.println(Thread.currentThread().getName()+" == "+i);
}
}
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally
{
lock.unlock();
}
}
}
public class OddEven {
public static void main(String[] a)
{
Lock lock = new ReentrantLock();
Condition condition = lock.newCondition();
Future future1;
Future future2;
ExecutorService executorService = Executors.newFixedThreadPool(2);
future1 = executorService.submit(new TaskClass1(condition,lock));
future2 = executorService.submit(new TaskClass2(condition,lock));
executorService.shutdown();
}
}
Ich würde mich auch mit Java Concurrency beschäftigen, wenn Sie Alternativen suchen. Einige der Funktionen des Java Concurrency-Pakets bieten eine höhere Abstraktion als die direkte Verwendung der Thread-Klasse und bieten als Ergebnis mehr Funktionalität.
Für Ihren speziellen Fall ist das, was Sie tun, durchaus vernünftig, aber ist die Reihenfolge des Druckens dieser Zahlen wichtig? Willst du Gleichen vor Widrigkeiten? Diese Art von Fragen zeigt besser das Design an, das Ihren Bedürfnissen am besten entspricht.
Nicht die Antwort auf das obige Problem, sondern auf ähnliche Weise.
Programmieren Sie die Elemente des Arrays nacheinander, verwenden Sie jedoch zwei verschiedene Threads, um die benachbarten Elemente zu drucken
import Java.util.logging.Level;
import Java.util.logging.Logger;
/**
*
* @author ntv
*/
public class PrintLAternateNumber {
public static void main(String[] args) {
int [] num = {1,2,3,4,5,6};
Printer p = new Printer();
Thread t1 = new Thread(new Thread1(num, p), "Thread1");
Thread t2 = new Thread(new Thread2(num, p), "Thread2");
t1.start();
t2.start();
}
}
class Thread1 implements Runnable {
int [] num;
Printer p ;
public Thread1(int[] num, Printer p) {
this.num = num;
this.p = p;
}
public void run() {
try {
print();
} catch (InterruptedException ex) {
Logger.getLogger(Thread1.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void print() throws InterruptedException {
int i = 1;
while(i < num.length) {
synchronized(num) {
while (p.evenPrinted) {
num.wait();
}
}
synchronized(num) {
p.printEven(Thread.currentThread().getName(), num[i]);
i= i + 2;
num.notifyAll();
}
}
}
}
class Thread2 implements Runnable {
int [] num;
Printer p ;
public Thread2(int[] num, Printer p) {
this.num = num;
this.p = p;
}
public void run() {
try {
print();
} catch (InterruptedException ex) {
Logger.getLogger(Thread2.class.getName()).log(Level.SEVERE, null, ex);
}
}
public void print() throws InterruptedException {
int i = 0;
while(i < num.length) {
synchronized(num) {
while (!p.evenPrinted) {
num.wait();
}
}
synchronized(num) {
p.printOdd(Thread.currentThread().getName(), num[i]);
i = i + 2;
num.notifyAll();
}
}
}
}
class Printer {
boolean evenPrinted = true;
void printEven(String threadName , int i) {
System.out.println(threadName + "," + i);
evenPrinted = true;
}
void printOdd(String threadName , int i) {
System.out.println(threadName + "," + i);
evenPrinted = false;
}
}
package thread;
import org.hibernate.annotations.Synchronize;
class PrintOdd implements Runnable {
int count = -1;
private Object common;
PrintOdd(Object common) {
this.common = common;
}
@Override
public void run() {
synchronized (common) {
while (count < 1000) {
try {
common.notifyAll();
System.out.println(count += 2);
common.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
class PrintEven implements Runnable {
int count = 0;
private Object common;
PrintEven(Object common) {
this.common = common;
}
@Override
public void run() {
synchronized (common) {
while (count < 1000) {
try {
common.notifyAll();
System.out.println(count += 2);
common.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
public class PrintNatural {
public static void main(String args[]) {
Object obj = new Object();
Runnable r = new PrintOdd(obj);
Thread printOdd = new Thread(r);
Runnable r2 = new PrintEven(obj);
Thread printEven = new Thread(r2);
printOdd.start();
printEven.start();
}
}
Die Nummern werden in der Reihenfolge gedruckt
Main class
===========
package com.thread;
import Java.util.concurrent.atomic.AtomicInteger;
public class StartThread {
static AtomicInteger no = new AtomicInteger(1);
public static void main(String[] args) {
Odd oddObj = new Odd();
Thread odd = new Thread(oddObj);
Thread even = new Thread(new Even(oddObj));
odd.start();
even.start();
}
}
Odd Thread
===========
package com.thread;
public class Odd implements Runnable {
@Override
public void run() {
while (StartThread.no.get() < 20) {
synchronized (this) {
System.out.println("Odd=>" + StartThread.no.get());
StartThread.no.incrementAndGet();
try {
this.notify();
if(StartThread.no.get() == 20)
break;
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
Even Thread
===========
package com.thread;
public class Even implements Runnable {
Odd odd;
public Even(Odd odd) {
this.odd = odd;
}
@Override
public void run() {
while (StartThread.no.get() < 20) {
synchronized (odd) {
System.out.println("Even=>" + StartThread.no.get());
StartThread.no.incrementAndGet();
odd.notifyAll();
try {
odd.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
Output (Nos are printed in sequential)
======
Odd=>1
Even=>2
Odd=>3
Even=>4
Odd=>5
Even=>6
Odd=>7
Even=>8
Odd=>9
Even=>10
Odd=>11
Even=>12
Odd=>13
Even=>14
Odd=>15
Even=>16
Odd=>17
Even=>18
Odd=>19
package com.example;
public class MyClass {
static int mycount=0;
static Thread t;
static Thread t2;
public static void main(String[] arg)
{
t2=new Thread(new Runnable() {
@Override
public void run() {
System.out.print(mycount++ + " even \n");
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
if(mycount>25)
System.exit(0);
run();
}
});
t=new Thread(new Runnable() {
@Override
public void run() {
System.out.print(mycount++ + " odd \n");
try {
Thread.sleep(500);
} catch (InterruptedException e) {
e.printStackTrace();
}
if(mycount>26)
System.exit(0);
run();
}
});
t.start();
t2.start();
}
}
public class OddEvenPrinetr {
private static Object printOdd = new Object();
public static void main(String[] args) {
Runnable oddPrinter = new Runnable() {
int count = 1;
@Override
public void run() {
while(true){
synchronized (printOdd) {
if(count >= 101){
printOdd.notify();
return;
}
System.out.println(count);
count = count + 2;
try {
printOdd.notify();
printOdd.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
};
Runnable evenPrinter = new Runnable() {
int count = 0;
@Override
public void run() {
while(true){
synchronized (printOdd) {
printOdd.notify();
if(count >= 100){
return;
}
count = count + 2;
System.out.println(count);
printOdd.notify();
try {
printOdd.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
};
new Thread(oddPrinter).start();
new Thread(evenPrinter).start();
}
}
public class ThreadExample {
Object lock = new Object();
class ThreadEven implements Runnable {
@Override
public void run() {
int i = 2;
while (i <= 20) {
synchronized (lock) {
System.out.println(i + " ");
i = i + 2;
lock.notify();
try {
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
class ThreadOdd implements Runnable {
@Override
public void run() {
int i = 1;
while (i <= 20) {
synchronized (lock) {
System.out.println(i + " ");
i = i + 2;
try {
lock.notify();
lock.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
}
public static void main(String args[]) {
ThreadExample example = new ThreadExample();
ThreadExample.ThreadOdd odd = example.new ThreadOdd();
ThreadExample.ThreadEven even = example.new ThreadEven();
Thread oT = new Thread(odd);
Thread eT = new Thread(even);
oT.start();
eT.start();
}
öffentliche Klasse ConsecutiveNumberPrint {
private static class NumberGenerator {
public int MAX = 100;
private volatile boolean evenNumberPrinted = true;
public NumberGenerator(int max) {
this.MAX = max;
}
public void printEvenNumber(int i) throws InterruptedException {
synchronized (this) {
if (evenNumberPrinted) {
wait();
}
System.out.println("e = \t" + i);
evenNumberPrinted = !evenNumberPrinted;
notify();
}
}
public void printOddNumber(int i) throws InterruptedException {
synchronized (this) {
if (!evenNumberPrinted) {
wait();
}
System.out.println("o = \t" + i);
evenNumberPrinted = !evenNumberPrinted;
notify();
}
}
}
private static class EvenNumberGenerator implements Runnable {
private NumberGenerator numberGenerator;
public EvenNumberGenerator(NumberGenerator numberGenerator) {
this.numberGenerator = numberGenerator;
}
@Override
public void run() {
for(int i = 2; i <= numberGenerator.MAX; i+=2)
try {
numberGenerator.printEvenNumber(i);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
private static class OddNumberGenerator implements Runnable {
private NumberGenerator numberGenerator;
public OddNumberGenerator(NumberGenerator numberGenerator) {
this.numberGenerator = numberGenerator;
}
@Override
public void run() {
for(int i = 1; i <= numberGenerator.MAX; i+=2) {
try {
numberGenerator.printOddNumber(i);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
public static void main(String[] args) {
NumberGenerator numberGenerator = new NumberGenerator(100);
EvenNumberGenerator evenNumberGenerator = new EvenNumberGenerator(numberGenerator);
OddNumberGenerator oddNumberGenerator = new OddNumberGenerator(numberGenerator);
new Thread(oddNumberGenerator).start();
new Thread(evenNumberGenerator).start();
}
}
paket p.Threads;
public class PrintEvenAndOddNum {
private Object obj = new Object();
private static final PrintEvenAndOddNum peon = new PrintEvenAndOddNum();
private PrintEvenAndOddNum(){}
public static PrintEvenAndOddNum getInstance(){
return peon;
}
public void printOddNum() {
for(int i=1;i<10;i++){
if(i%2 != 0){
synchronized (obj) {
System.out.println(i);
try {
System.out.println("oddNum going into waiting state ....");
obj.wait();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("resume....");
obj.notify();
}
}
}
}
public void printEvenNum() {
for(int i=1;i<11;i++){
if(i%2 == 0){
synchronized(obj){
System.out.println(i);
obj.notify();
try {
System.out.println("evenNum going into waiting state ....");
obj.wait();
System.out.println("Notifying waiting thread ....");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
}
}
public class MyThread {
public static void main(String[] args) {
// TODO Auto-generated method stub
Threado o =new Threado();
o.start();
Threade e=new Threade();
e.start();
}
}
class Threade extends Thread{
public void run(){
for(int i=2;i<10;i=i+2)
System.out.println("evens "+i);
}
}
class Threado extends Thread{
public void run(){
for(int i=1;i<10;i=i+2)
System.out.println("odds "+i);
}
}
AUSGABE :-
odds 1 Odds 3 Odds 5 Odds 7 Odds 9 evens 2 evens 4 .__
public class EvenOddNumberPrintUsingTwoThreads {
public static void main(String[] args) {
// TODO Auto-generated method stub
Thread t1 = new Thread() {
public void run() {
for (int i = 0; i <= 10; i++) {
if (i % 2 == 0) {
System.out.println("Even : " + i);
}
}
}
};
Thread t2 = new Thread() {
// int i=0;
public void run() {
for (int i = 0; i <= 10; i++) {
if (i % 2 == 1) {
System.out.println("Odd : " + i);
}
}
}
};
t1.start();
t2.start();
}
}
Die Frage sollte lauten: Gleichzeitiges Drucken von ungeraden Zahlen mithilfe von Threads
public class EvenOdd1 {
static boolean flag = true;
public static void main(String[] args) {
Runnable odd = () -> {
for (int i = 1; i <= 10;) {
if (EvenOddPrinter.flag) {
System.out.println(Thread.currentThread().getName() + " " + i);
i += 2;
EvenOddPrinter.flag = !EvenOddPrinter.flag;
}//if
}//for
};
Runnable even = () -> {
for (int i = 2; i <= 10;) {
if (!EvenOddPrinter.flag) {
System.out.println(Thread.currentThread().getName() + " " + i);
i += 2;
EvenOddPrinter.flag = !EvenOddPrinter.flag;
}
}
};
Thread t1 = new Thread(odd, "Odd");
Thread t2 = new Thread(even, "Even");
t1.start();
t2.start();
}
}
/*The output =>
Odd 1
Even 2
Odd 3
Even 4
Odd 5
Even 6
Odd 7
Even 8
Odd 9
Even 10
*/
public class ThreadClass {
volatile int i = 1;
volatile boolean state=true;
synchronized public void printOddNumbers(){
try {
while (!state) {
wait();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+" "+i);
state = false;
i++;
notifyAll();
}
synchronized public void printEvenNumbers(){
try {
while (state) {
wait();
}
} catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println(Thread.currentThread().getName()+" "+i);
state = true;
i++;
notifyAll();
}
}
Rufen Sie dann die obige Klasse so auf
// I am ttying to print 10 values.
ThreadClass threadClass=new ThreadClass();
Thread t1=new Thread(){
int k=0;
@Override
public void run() {
while (k<5) {
threadClass.printOddNumbers();
k++;
}
}
};
t1.setName("Thread1");
Thread t2=new Thread(){
int j=0;
@Override
public void run() {
while (j<5) {
threadClass.printEvenNumbers();
j++;
}
}
};
t2.setName("Thread2");
t1.start();
t2.start();
- Hier versuche ich die Zahlen von 1 bis 10 zu drucken.
- Ein Thread, der versucht, die geraden Zahlen zu drucken, und ein anderer Thread.
- meine Logik ist, die gerade Zahl nach der ungeraden Zahl zu drucken. Für diesen Thread mit geraden Zahlen sollte warten, bis er von der Methode der ungeraden Zahlen benachrichtigt wird.
- Jeder Thread ruft eine bestimmte Methode 5 Mal auf, weil ich nur 10 Werte drucken möchte.
ausgabe:
System.out: Thread1 1
System.out: Thread2 2
System.out: Thread1 3
System.out: Thread2 4
System.out: Thread1 5
System.out: Thread2 6
System.out: Thread1 7
System.out: Thread2 8
System.out: Thread1 9
System.out: Thread2 10
So ziemlich alles, was Sie brauchen, wenn Sie gerade Zahlen mit ungerader Zahl synchronisieren wollen.
public class ThreadingOddEvenNumbers {
void main(String[] args) throws InterruptedException {
Printer printer = new Printer(57);
Thread t1 = new Thread(new MyRunner(printer, true), "EvenPrinter");
Thread t2 = new Thread(new MyRunner(printer, false), "OddPrinter");
t1.start();
t2.start();
t1.join();
t2.join();
}
}
class MyRunner implements Runnable {
private Printer p;
private boolean evenProperty;
public MyRunner(Printer p, boolean evenNess) {
this.p = p;
evenProperty = evenNess;
}
public void run() {
try {
print();
} catch (InterruptedException ex) {
System.out.println(this.getClass().getName() + " "
+ ex.getMessage());
}
}
public void print() throws InterruptedException {
while (!p.isJobComplete()) {
synchronized (p) {
if (evenProperty)
while (p.isEvenPrinted()) {
System.out.println("wait by: "
+ Thread.currentThread().getName());
p.wait();
if (p.isJobComplete())
break;
}
else
while (!p.isEvenPrinted()) {
System.out.println("wait by: "
+ Thread.currentThread().getName());
p.wait();
if (p.isJobComplete())
break;
}
}
synchronized (p) {
if (evenProperty)
p.printEven(Thread.currentThread().getName());
else
p.printOdd(Thread.currentThread().getName());
p.notifyAll();
System.out.println("notify called: by: "
+ Thread.currentThread().getName());
}
}
}
}
class Printer {
private volatile boolean evenPrinted;
private volatile boolean jobComplete;
private int limit;
private int counter;
public Printer(int lim) {
limit = lim;
counter = 1;
evenPrinted = true;
jobComplete = false;
}
public void printEven(String threadName) {
System.out.println(threadName + "," + counter);
incrCounter();
evenPrinted = true;
}
public void printOdd(String threadName) {
System.out.println(threadName + "," + counter);
incrCounter();
evenPrinted = false;
}
private void incrCounter() {
counter++;
if (counter >= limit)
jobComplete = true;
}
public int getLimit() {
return limit;
}
public boolean isEvenPrinted() {
return evenPrinted;
}
public boolean isJobComplete() {
return jobComplete;
}
}