Java ArrayBag grab()和remove()方法,使用.grab()方法后如何删除字符串?
假设我想向ArrayBag添加3个形容词,通过使用JavaDoc for ArrayBag中的每个方法,如果grab()方法从ArrayBag中随机抽取一个形容词并使用它,我应该如何在使用后一次删除一个形容词Java ArrayBag grab()和remove()方法,使用.grab()方法后如何删除字符串?,java,netbeans,methods,Java,Netbeans,Methods,假设我想向ArrayBag添加3个形容词,通过使用JavaDoc for ArrayBag中的每个方法,如果grab()方法从ArrayBag中随机抽取一个形容词并使用它,我应该如何在使用后一次删除一个形容词 /** * Accessor method to retrieve a random element from this ArrayBag and will * remove the grabbed element from the ArrayBag * * @return A r
/**
* Accessor method to retrieve a random element from this ArrayBag and will
* remove the grabbed element from the ArrayBag
*
* @return A randomly selected element from this ArrayBag
* @throws java.lang.IllegalStateException Indicated that the ArrayBag is
* empty
*/
public E grab() {
int i;
//E n;
if (items == 0) {
throw new IllegalStateException("ArrayBag size is empty");
}
i = (int) (Math.random() * items + 1);
// n = elementArray[i - 1];
//if (items != 0) {
// remove(n);
//}
return elementArray[i - 1];
}
及
一旦我调用
形容词.grab()
我该如何删除使用过的随机字符串?非常感谢您的帮助。答案在于在从ArrayBag中删除元素后更改ArrayBag的大小。所有这些都在grab()方法中
答案在于在grab()方法中从ArrayBag中移除元素后更改ArrayBag的大小
/**
* Remove one specified element from this ArrayBag
*
* @param target The element to remove from this ArrayBag
* @return True if the element was removed from this ArrayBag; false
* otherwise
*/
public boolean remove(E target) {
int i;
if (target == null) {
i = 0;
while ((i < items) && (elementArray[i] != null)) {
i++;
}
} else {
i = 0;
while ((i < items) && (!target.equals(elementArray[i]))) {
i++;
}
}
if (i == items) {
return false;
} else {
items--;
elementArray[i] = elementArray[items];
elementArray[items] = null;
return true;
}
}
printText(3, "adjectives");
adjectives.ensureCapacity(3);
adjective = input.nextLine();
String[] arr = adjective.split(" ");
for(String ss : arr) {
adjectives.add(ss);
/**
* Accessor method to retrieve a random element from this ArrayBag and will
* remove the grabbed element from the ArrayBag
*
* @return A randomly selected element from this ArrayBag
* @throws java.lang.IllegalStateException Indicated that the ArrayBag is
* empty
*/
public E grab() {
int i;
E n;
if (items == 0) {
throw new IllegalStateException("ArrayBag size is empty");
}
i = (int) (Math.random() * items + 1);
n = elementArray[i - 1];
remove(n);
trimToSize();
return n
}