5.28

package kese;
public class zuoye{
    public static void main (String[]args) {
        int []a=new int[10];
        int i;
        for(i=0;i<a.length ;i++) {
            a[i]=(int)(Math.random()*101);
        }
        for(i=0;i<a.length ;i++) {
            System.out.print(a[i]+" ");
        }
    }
}

package kese;

public class viod {

}

package kese;

import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
  
public class zuoye {
  
 public static void main(String[] args) throws ParseException {
     // TODO Auto-generated method stub
     SimpleDateFormat CeshiFmt0 = new SimpleDateFormat("Gyyyy年MM月dd日");
     SimpleDateFormat CeshiFmt5 = new SimpleDateFormat("今天是Gyyyy年的第 D 天 ，E");
     Date now = new Date();
     System.out.println(CeshiFmt0.format(now));
     System.out.println(CeshiFmt5.format(now));
 }
  
}

package kese;

import java.util.Scanner;
public class zuoye{
    public static void  main (String[]args) {
        //TODO Auto-generated method stub
        Scanner input=new Scanner(System.in);
        System.out.print("请输入合法的新浪邮件：");
        String str =input.nextLine();
        int count=0;
        int count2=0;
        int x=0;
        int y=0;
        for(int j=0;j<str.length()-1;j++) {
            String str1=str.substring(j,j+1);
            if(str1.contentEquals("@")) {
                count++;
                x=j;
            }
            if(str1.contentEquals(".")) {
                count2++;
                y=j;
            }
        }
        if(count==1&&count2==1&&x<(y-1)&&x!=0&&y!=str.length()-1) {
            str.endsWith("@sina.com");
            System.out.println("合法");
        }else {
            System.out.println("不合法");
        }
    }
}