public class ListQueue extends LinkedList {
public ListQueue() {
super();
}
public boolean empty() {
return isEmpty();
}
public void enqueue(Object item) {
addToTail(item);
}
public Object dequeue() {
return removeFromHead();
}
public int size(){
return super.size();
}
}
// class ListQueue
ListQueue.java:20:错误:找不到符号
return super.size(); ^
符号:方法大小() 1错误
答案 0 :(得分:0)
请检查固定解决方案:
import java.util.LinkedList;
public class ListQueue extends LinkedList {
public ListQueue() {
super();
}
public boolean empty() {
return super.isEmpty();
}
public void enqueue(Object item) {
super.add(item);
}
public Object dequeue() {
return super.removeFirst();
}
public int size(){
return super.size();
}
}
答案 1 :(得分:-1)
将此添加到类的导入部分:
import java.util.LinkedList;