如果可以永远，为何不呢？

熟悉一下各种数据结构了   话不多说  package DataStruction; public class MyStack { private long[] stackArray; private int top; private int maxSize; public MyStack(int num) { maxSize = num; top = -1; stackA

import java.util.HashMap; import java.util.Random; import java.util.Scanner; public class UniqueAndRandom implements Runnable{ static HashMap map=new HashMap(); static int times=0; public static