. lang。RuntimeException:不可编译源代码

Here is the full code, this program is supposed to work since I copied it from the book:

这是完整的代码，这个程序应该可以工作，因为我从书中复制了它:

Java: A Beginner's Guide: Herbert Schildt

初学者指南:Herbert Schildt

Class FixedQueue:

类FixedQueue:

// A fixed-size queue class for characters that uses exceptions.
class FixedQueue implements ICharQ {
    private char q[]; // this array holds the queue
    private int putloc, getloc; // the put and get indices

    // Construct an empty queue given its size.
    public FixedQueue(int size) {
        q = new char[size]; // allocate memory for queue
        putloc = getloc = 0;
    }

    // Put a character into the queue.
    public void put(char ch) throws QueueFullException {

        if(putloc==q.length)
            throw new QueueFullException(q.length);

        q[putloc++] = ch;
    }

    // Get a character from the queue.
    public char get() throws QueueEmptyException {

        if(getloc == putloc)
            throw new QueueEmptyException();

        return q[getloc++];
    }
}

Interface ICharQ:

接口ICharQ:

// A character queue interface.
public interface ICharQ {
    // Put a character into the queue.
    void put (char ch) throws QueueFullException;

    // Get a character from the queue.
    char get() throws QueueEmptyException;
}

Class QExcDemo:

类QExcDemo:

// Demonstrate the queue exceptions.
class QExcDemo {
    public static void main(String args[]) {
        FixedQueue q = new FixedQueue(10);
        char ch;
        int i;

        try {
            // over-empty the queue
            for(i=0; i<11; i++) {
                System.out.print("Getting next char: ");
                ch = q.get();
                System.out.println(ch);
            }
        }
        catch(QueueEmptyException exc) {
            System.out.println(exc);
        }
    }
}

Class QueueEmptyException:

类QueueEmptyException:

// An exception for queue-empty errors.
public class QueueEmptyException extends Exception {

    public String toString() {
        return "\nQueue is empty.";
    }
}

Class QueueFullException:

类QueueFullException:

// An exception for queue-full errors.
public class QueueFullException extends Exception {
    int size;

    QueueFullException(int s) { size = s; }

    public String toString() {
        return "\nQueue is full. Maximum size is " + size;
    }
}

When I build the program, why is that there is an error about exceptions?

当我构建这个程序时，为什么会有关于异常的错误呢?

run: Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - get() in dec15_javatutorial.FixedQueue cannot implement get() in dec15_javatutorial.ICharQ overridden method does not throw dec15_javatutorial.QueueEmptyException Getting next char: at dec15_javatutorial.FixedQueue.get(FixedQueue.java:28) at dec15_javatutorial.QExcDemo.main(QExcDemo.java:33) Java Result: 1

运行:线程“main”java.lang中的异常。RuntimeException:无法编译的源代码——在dec15_javatu中得到()。FixedQueue不能实现dec15_javatu心目中的get()。ICharQ重写方法不会抛出dec15_javatu心目中的方法。QueueEmptyException正在获取下一个char:在dec15_javatual.fixedqueue .get(FixedQueue.java:28)位于dec15_javatutorial.QExcDemo.main(QExcDemo.java:33) Java结果:1

Thanks

谢谢

1 个解决方案

#1

I've copied all of your classes into a project and run it. It compiles and runs.

我已经将你所有的类复制到一个项目中并运行它。它编译和运行。

The output:

输出:

Getting next char: 
Queue is empty.

My guess is either you've changed something in the FixedQueue and forgot to save or you imported something incorrectly.

我的猜测是，要么您在FixedQueue中更改了一些内容，忘记保存，要么您导入了一些错误的内容。

#1