1
我想用(對於字符串數組)在java中使用StringBuilder的addFirst和addLast方法?
public void addFirst(String Element)
{
}
和
public void addLast(String Element){
}
我知道加我會用
public void add(int index, String element) {
int len = names.length;
if (index < len)
names[index] = element;
else {
names = Arrays.copyOf(names, len + (index - len + 1));
names[index] = element;
}
}
會我剛將索引更改爲0以元素?