public class SynchronizedTest {
	public static void main(String[] args) throws Exception {
		Stack s = new Stack();//实例化一个栈对象
		s.print();//将栈中所有元素输出到控制台
		Thread t1 = new PushThread(s);//利用多态实例化一个线程
		Thread t2 = new PopThread(s);
		t1.start();
		t2.start();
		Thread.sleep(10000);//休眠10秒钟
		s.print();
	}
}

/*定义一个栈*/
class Stack {
	char[] data = { ‘A‘, ‘B‘, ‘C‘, ‘D‘ };//定义一个字符数组
	int index = 2;//假设当前索引为2

	/*利用synchronized实现加锁功能*/
	public synchronized void push(char ch) {
		System.out.println(ch + " pushed!");
		data[index] = ch;
		try {
			Thread.sleep(5000);
		} catch (InterruptedException e) {
		}
		index++;
		System.out.println("1:" + index);
	}

	/*利用synchronized实现加锁功能*/
	public synchronized void pop() {
		System.out.println("2:" + index);
		index--;
		System.out.println("3:" + index);
		System.out.println(data[index] + " poped!");
		data[index] = ‘ ‘;
	}

	/*输出字符数组元素到控制台*/
	public void print() {
		for (int i = 0; i < data.length; i++) {
			System.out.print(data[i] + "  ");
		}
		System.out.println();
	}
}

/*定义一个入栈的线程*/
class PushThread extends Thread {
	Stack s;

	public PushThread(Stack s) {
		this.s = s;
	}

	public void run() {
		s.push(‘C‘);
	}
}

/*定义一个出栈的线程*/
class PopThread extends Thread {
	Stack s;

	public PopThread(Stack s) {
		this.s = s;
	}

	public void run() {
		s.pop();
	}
}

Java--Synchronized源代码测试,布布扣,bubuko.com

Java--Synchronized源代码测试