百戰(zhàn)JavaP7架構(gòu)師2022
public int indexOf(Object value) {
? ?}
? ?/**
? ? * Get the length of array list.
? ? *
? ? * @return
? ? */
? ?public int size() {
? ? ? ?return size;
? ?}
? ?/**
? ? * Determinate the array list is empty or not.
? ? *
? ? * @return the status.
? ? */
? ?public boolean isEmpty() {
? ? ? ?return size == 0;
? ?}
標簽：
