precious-ming

<script type="text/javascript">
    a();//页面加载执行a()
    var i;
    function a() {
        alert("1");
         i = setTimeout("b()", 3000);//3秒后执行b()
    }
    function b() {
        alert("2");
        clearTimeout(i); //清除延时代码

precious-ming

public class GuessNums {
  public static void main(String[] args){
		
		int[] nums = new int[100];
		for(int i = 0;i < nums.length;i++){		
			nums[i] = i;
			
		}
		
		java.util.Random random = new java.util.Random();

precious-ming

public class Change{

  public static void main(String[] args){
	
	
		java.util.Scanner input = new java.util.Scanner(System.in);
				
		System.out.println("本程序交换数字x和y的值!\n");
		System.out.println("请您分别输入数字x和y的值，并以回车结束回车 ");