java - 创建一个双镜像三角形

我需要像这样制作镜像三角形的帮助:

*      *
**    **
***  ***
********

我可以单独购买每个，但不能将它们结合在一起。

public static void main(String[] args){
      for( int i = 1; i <= 5; i++ ){
            for( int j = 0; j < i; j++ ){
                System.out.print("*");

            }
            System.out.println();
        }
      for(int i = 0; i < 6; i++)
      {
          for(int j = 5; j > 0; j--)
          {
              if(i < j)
                  System.out.print(" ");
              else
                  System.out.print("*");
          }
          System.out.println();
      }
}

最佳答案

您可以使用此代码来实现。

public class Test {
    public void sizeOfTri(int triSize) { //Number of lines
        int line = 1;
        for(int i = 0; i < triSize; i++) { //Handles Each line
            int temp = triSize * 2;
            for(int j = 1; j < temp; j++) { //Handles Each space on the line
                if(j <= line && j == triSize || j >= temp - line && j == triSize) { //For the very last line because it needs an extra *
                    System.out.print("**");
                } else if(j <= line || j >= temp - line) { //For normal lines
                    System.out.print("*");
                } else if(j == triSize) {
                    System.out.print("  "); //For the second to last line because it needs an extra space to make it look mirrored
                } else { //For normal lines
                    System.out.print(" ");
                }
            }
            System.out.println();
            line++;
        }
    }

    public static void main(String[] args) {
        new Test().sizeOfTri(4);
    }
}

我在if语句旁边评论了哪个部分做什么。运行时将产生如下所示的输出

*      *
**    **
***  ***
********