java循环的for基础问题

Question

初学者，学到循环。
就是有什么比这个简单的方法，输出菱形，感觉我这个很麻烦。

Answer 1

 /* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        // your code goes here
        for (int a=1; a<=5; a++) {
            for (int b=a;b<5+a;b++) System.out.print(b >= 5 ? "* " : " ");
            System.out.println();
        }
        for (int a=1; a<=4; a++) {
            for (int b=0;b<a;b++) System.out.print(" ");
            for (int b=a;b<5;b++) System.out.print("* ");
            System.out.println();
        }
    }
}