java多线程小例子

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
public 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
public 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
public 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();
}
}