對不起,從我在這裏的問題開始:here我試圖運行此方法從雙面隊列(雙端隊列)中刪除一個通用值(EltType),但我保留得到一個錯誤,我調用insertFirst兩次,並將值「3」插入數組兩次,然後,當我運行removeFirst時,它將打印出「3」一次,然後「空」。任何人都可以幫助我嗎?在java中實現雙端隊列的問題
class ArrayBasedDeque<EltType> {
private final int CAPACITY = 10;
private int capacity;
private int end;
private EltType deque[];
public ArrayBasedDeque() {
this.capacity = CAPACITY;
deque = (EltType[]) (new Object[capacity]);
}
public EltType removeFirst() {
EltType[] tempArray;
EltType returned = deque[0];
tempArray = (EltType[]) new Object[capacity];
for (int i=1;i<capacity;i++) {
tempArray[i-1] = deque[i];
}
deque = tempArray;
return returned;
}
public boolean isEmpty() {
return end == 0;
}
public void insertFirst(EltType first) {
if(!isEmpty()) {
EltType[] tempArray;
tempArray = (EltType[]) new Object[capacity+1];
for (int i=0;i<deque.length;i++) {
tempArray[i+1] = deque[i];
}
deque = tempArray;
}
deque[0] = first;
}
}
謝謝:)
你爲什麼要投射一個這樣的新陣列?爲什麼不創建這種類型的數組? `deque =(EltType [])(new Object [capacity])` – 2011-02-07 22:39:30