双面排队问题
我正在尝试运行此方法,以将通用值(EltType)插入到双面队列(双端队列)中,但是我一直收到无法确定的outOfBoundsException。有人能帮我这个忙吗?这只是代码的一部分,但我认为可以将其拼凑起来!
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 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;
}
public boolean isEmpty() {
boolean returned;
if (deque.length < 1) {
returned = true;
}else {
returned = false;
}
return returned;
}
错误:
java.lang.ArrayIndexOutOfBoundsException: 10 at ArrayBasedDeque.insertFirst(ArrayBasedDeque.java:48)
at TestABD.main(TestABD.java:5)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at edu.rice.cs.drjava.model.compiler.JavacCompiler.runCommand(JavacCompiler.java:271)
回答:
for (int i=0;i<=deque.length;i++) {
应该变成
for (int i=0;i<deque.length;i++) {
您使用了“小于或等于”,但是数组的最后一项的索引为(length-1)。
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