JAVA多线程经典例子
2009-06-09 20:44
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相信研究多线程的人都会首先从这个经典事例开始:
Stack类:
Java代码
class Stack {
int count;
String[] data = new String[20];
public synchronized void push(String str) {
while (count == data.length) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
this.notify();
data[count] = str;
count++;
}
public synchronized String get() {
while (count == 0) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
this.notify();
count = count - 1;
return data[count];
}
}
Producer类:
Java代码
class Producer implements Runnable {
Stack Stackone;
public Producer(Stack s) {
Stackone = s;
}
public void run() {
String str;
for (int i = 0; i < 20; i++) {
str = String.valueOf(i + 1);
Stackone.push(str);
System.out.println("Product:" + str + " count=" + Stackone.count);
try {
Thread.sleep((int) (Math.random() * 100));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
Coumter类:
Java代码
class Coumter implements Runnable {
Stack stackOne;
public Coumter(Stack s) {
stackOne = s;
}
public void run() {
String s;
for (int i = 0; i < 20; i++) {
s = stackOne.get();
System.out.println("Coumet:" + s + " count=" + stackOne.count);
try {
Thread.sleep((int) (Math.random() * 100));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
StackTest类:
Java代码
public class StackTest {
public static void main(String[] args) {
Stack s = new Stack();
Producer p = new Producer(s);
Coumter c = new Coumter(s);
Thread t1 = new Thread(p);
Thread t2 = new Thread(c);
t1.start();
t2.start();
}
}
运行结果如下:
Product:1 count=1
Coumet:1 count=0
Product:2 count=1
Coumet:2 count=0
Product:3 count=1
Coumet:3 count=0
Product:4 count=1
Coumet:4 count=0
Product:5 count=1
Coumet:5 count=0
Product:6 count=1
Coumet:6 count=0
Product:7 count=1
Product:8 count=2
Product:9 count=3
Coumet:9 count=2
Coumet:8 count=1
Product:10 count=2
Product:11 count=3
Coumet:11 count=2
Product:12 count=3
Product:13 count=4
Coumet:13 count=3
Product:14 count=4
Coumet:14 count=3
Product:15 count=4
Coumet:15 count=3
Coumet:12 count=2
Product:16 count=3
Coumet:16 count=2
Product:17 count=3
Coumet:17 count=2
Product:18 count=3
Coumet:18 count=2
Product:19 count=3
Coumet:19 count=2
Product:20 count=3
Coumet:20 count=2
Coumet:10 count=1
Coumet:7 count=0
转:http://lshh83.javaeye.com/blog/334214
Stack类:
Java代码
class Stack {
int count;
String[] data = new String[20];
public synchronized void push(String str) {
while (count == data.length) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
this.notify();
data[count] = str;
count++;
}
public synchronized String get() {
while (count == 0) {
try {
this.wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
}
this.notify();
count = count - 1;
return data[count];
}
}
Producer类:
Java代码
class Producer implements Runnable {
Stack Stackone;
public Producer(Stack s) {
Stackone = s;
}
public void run() {
String str;
for (int i = 0; i < 20; i++) {
str = String.valueOf(i + 1);
Stackone.push(str);
System.out.println("Product:" + str + " count=" + Stackone.count);
try {
Thread.sleep((int) (Math.random() * 100));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
Coumter类:
Java代码
class Coumter implements Runnable {
Stack stackOne;
public Coumter(Stack s) {
stackOne = s;
}
public void run() {
String s;
for (int i = 0; i < 20; i++) {
s = stackOne.get();
System.out.println("Coumet:" + s + " count=" + stackOne.count);
try {
Thread.sleep((int) (Math.random() * 100));
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}
StackTest类:
Java代码
public class StackTest {
public static void main(String[] args) {
Stack s = new Stack();
Producer p = new Producer(s);
Coumter c = new Coumter(s);
Thread t1 = new Thread(p);
Thread t2 = new Thread(c);
t1.start();
t2.start();
}
}
运行结果如下:
Product:1 count=1
Coumet:1 count=0
Product:2 count=1
Coumet:2 count=0
Product:3 count=1
Coumet:3 count=0
Product:4 count=1
Coumet:4 count=0
Product:5 count=1
Coumet:5 count=0
Product:6 count=1
Coumet:6 count=0
Product:7 count=1
Product:8 count=2
Product:9 count=3
Coumet:9 count=2
Coumet:8 count=1
Product:10 count=2
Product:11 count=3
Coumet:11 count=2
Product:12 count=3
Product:13 count=4
Coumet:13 count=3
Product:14 count=4
Coumet:14 count=3
Product:15 count=4
Coumet:15 count=3
Coumet:12 count=2
Product:16 count=3
Coumet:16 count=2
Product:17 count=3
Coumet:17 count=2
Product:18 count=3
Coumet:18 count=2
Product:19 count=3
Coumet:19 count=2
Product:20 count=3
Coumet:20 count=2
Coumet:10 count=1
Coumet:7 count=0
转:http://lshh83.javaeye.com/blog/334214
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