Question

我一直收到以下错误：

 PrintServerV1.java:63: error: unreported exception InterruptedException; must be caught or declared to be thrown
        server.printRequest("homework7.txt");
                           ^
PrintServerV1.java:64: error: unreported exception InterruptedException; must be caught or declared to be thrown
        server.printRequest("assignment4.txt");
                           ^
PrintServerV1.java:65: error: unreported exception InterruptedException; must be caught or declared to be thrown
        server.printRequest("speech.pdf");

而且我很确定我已经抛出了这个错误。只有在添加以下行时才会出现此错误：Thread.sleep(1000) 这是我的代码：

import java.util.*;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
import java.util.concurrent.locks.Condition;

import static java.lang.System.out;

public class PrintServerV1 implements Runnable {

    private static final Queue<String> requests = new LinkedList<String>();
    private Lock lock = new ReentrantLock();
    private Condition condition = lock.newCondition();

    public void printRequest(String s)  throws InterruptedException   {
        lock.lock();
        try {
            out.println("Adding print request for: " + s);
            requests.add(s);
            condition.signal();
        } finally { lock.unlock(); Thread.sleep(1000);}


    }

    public void sendRequest() throws InterruptedException {
        lock.lock();
        try {
            while (requests.size() == 0) {
                condition.await();
            }
            out.println("Sending Request to printer");
            Thread.sleep(1000);
            while (!requests.isEmpty()) {
                realPrint(requests.remove());
            }
        } finally {
            lock.unlock();
        }
    }

    private void realPrint(String s) throws InterruptedException  {
        // do the real work of outputting the string to the screen
        out.println("Currently printing: " + s);
        Thread.sleep(1000);
    }

    public void run() {
        try {
            sendRequest();
        } catch (InterruptedException exception) {}
    }

    public static void main(String[] args) {
        PrintServerV1 server = new PrintServerV1();
        new Thread(server).start();
        server.printRequest("homework7.txt");
        server.printRequest("assignment4.txt");
        server.printRequest("speech.pdf");
    }
}

Answer 1

因为你的printRequest方法抛出一个InterruptedException，它必须被main捕获，或者被main抛出......以下任何一个答案都应该有效......

<p>You Rolled a {{ yourRoll }}</p>

InterruptedException的;必须被抓住或宣布被抛出

1 个答案: