locktest.java

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package day20;

public class LockTest {
	public static void main(String[] args) {
		MyStack stack=new MyStack(20);
		Thread t1=new MyThreadA(stack);
		Thread t2=new MyThreadB(stack);
		t1.start();
		t2.start();
		
		try {
			Thread.sleep(10000);
		} catch (InterruptedException e) {
			e.printStackTrace();
		}
		System.out.println(stack);

	}
}

class MyThreadA extends Thread{
	private MyStack stack;
	
	public MyThreadA (MyStack stack){
		this.stack=stack;
	}
	
	public void run(){
		for(int i=0;i<10;i++){
			stack.push(i+"");
		}
	}
}

class MyThreadB extends Thread{
	private MyStack stack;
	
	public MyThreadB (MyStack stack){
		this.stack=stack;
	}
	
	public void run(){
		for(int i=0;i<10;i++){
			stack.push((char)('A'+i)+"");
		}
	}
}