queue.java

来自「cwbbs 云网论坛源码」· Java 代码 · 共 40 行

package com.cloudwebsoft.framework.util;

public class Queue extends java.util.Vector {
    public Queue() {
        super();
    }

    public synchronized void enq(Object x) {
        super.addElement(x);
    }

    public synchronized Object deq() {
        
        if (this.empty())
            throw new RuntimeException("Queue is Empty.");
        Object x = super.elementAt(0);
        super.removeElementAt(0);
        return x;
    }

    public synchronized Object front() {
        if (this.empty())
            throw new RuntimeException("Queue is Empty.");
        return super.elementAt(0);
    }

    public boolean empty() {
        return super.isEmpty();
    }

    public synchronized void clear() {
        super.removeAllElements();
    }

    public int search(Object x) {
        return super.indexOf(x);
    }
}