实现Runnable接口时出错

Question

 

public class ProjectDemo {

	public static void main(String[] args) {
		Resource res = new Resource();
		AddThread at = new AddThread(res);
		SubThread st = new SubThread(res);
		new Thread(at, "加法线程-A")。start();
		new Thread(st, "减法线程-B")。start();
		new Thread(at, "加法线程-X")。start();
		new Thread(st, "减法线程-Y")。start();
	}

}

class Resource{		//定义一个操作的资源
	private int num;		//要进行加减操作的数据
	private boolean flag = true;	//加减的切换
	//flag:true 可以进行加操作，不能进行减操作
	//flag:false 可以进行减操作，不能进行加操作
	
	public synchronized void add() throws Exception{	//执行加法操作
		Thread.sleep(100);		//加入延迟便于观察问题
		this.num++;
		System.out.println("【加法操作" + Thread.currentThread().getName() + "】num = " + this.num);
	}
	public synchronized void sub() throws Exception{	//执行减法操作
		Thread.sleep(200);
		this.num--;
		System.out.println("【减法操作" + Thread.currentThread().getName() + "】num = " + this.num);
	}
}

class AddThread implements Runnable{
	private Resource resource;
	public AddThread(Resource resource) {
		this.resource = resource;
	}
	@Override
	public void run() {
		for(int x=0; x<50; x+=) {
			try {
				this.resource.add();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}

class SubThread implements Runnable{
	private Resource resource;
	public AddThread(Resource resource) {
		this.resource = resource;
	}
	@Override
	public void run() {
		for(int x=0; x<50; x++) {
			try {
				this.resource.sub();
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
		}
	}
}

用的是eclipse，提示说the type Runnable cannot be the superinterface of AddThread, a superinterface must be a interface.

求大家指教 ，谢谢

Answer 1

public class ProjectDemo {
 
	public static void main(String[] args) {
		Resource res = new Resource();
		AddThread at = new AddThread(res);
		SubThread st = new SubThread(res);
		new Thread(at, "加法线程-A").start();
		new Thread(st, "减法线程-B").start();
		new Thread(at, "加法线程-X").start();
		new Thread(st, "减法线程-Y").start();
	}
 
}
 
class Resource{		//定义一个操作的资源
	private int num;		//要进行加减操作的数据
	private boolean flag = true;	//加减的切换
	//flag:true 可以进行加操作，不能进行减操作
	//flag:false 可以进行减操作，不能进行加操作
	
	public synchronized void add() throws Exception{	//执行加法操作
		Thread.sleep(100);		//加入延迟便于观察问题
		this.num++;
		System.out.println("【加法操作" + Thread.currentThread().getName() + "】num = " + this.num);
	}
	public synchronized void sub() throws Exception{	//执行减法操作
		Thread.sleep(200);
		this.num--;
		System.out.println("【减法操作" + Thread.currentThread().getName() + "】num = " + this.num);
	}
}
 
class AddThread implements Runnable{
	private Resource resource;
	public AddThread(Resource resource) {
		this.resource = resource;
	}
	@Override
	public void run() {
		for(int x=0; x<50; x++) {
			try {
				this.resource.add();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
}
 
class SubThread implements Runnable{
	private Resource resource;
	public SubThread(Resource resource) {
		this.resource = resource;
	}
	@Override
	public void run() {
		for(int x=0; x<50; x++) {
			try {
				this.resource.sub();
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
}