while循环打印*菱形

效果图如下图所示：

package myeclipseFiles2;

public class Rhombus {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int i=1;
        while(i<=4){
            int j=1;
            //先打印出前i+1个数
            while(j<=i+3){
                //判断打印的数中前几个数应该是打印空格
                if(j<=4-i){
                    System.out.print(" ");
                }else{
                    System.out.print("*");
                }
                j++;
            }
            System.out.println();
            i++;
        }
        int i1=1;
        while(i1<=3){
            int j1=1;
            while(j1<=7-i1){
                if(j1<=i1){
                    System.out.print(" ");
                }else{
                    System.out.print("*");
                }
                j1++;
            }
            System.out.println();
            i1++;
        }
    }

}