public class Queue {
LinkedList elementData = new LinkedList();
public void enQueue(Object o) {
if (o == null) {
System.out.println("传入对象不能为空");
} else {
elementData.add(o);
}
}
public Object deQueue() {
if (isEmpty()==true){
System.out.println("该队列为空队列!");
return null;
}else{
Object o = elementData.removeFirst();
return o;
}
}
public boolean isEmpty() {
if (elementData.size()==0){
return true;
}else {
return false;
}
}
public int size() {
return elementData.size();
}
}