java代码编写直角三角形等腰三角形倒三角形等等

//直角 for (int i = 0; i <=5 ; i++) { for (int j = 0; j <i-1 ; j++) { System.out.print("* "); } System.out.println(); } //另一半的直角 for (int i = 1; i <=5 ; i++) { for (int j = 1; j <=5-i ; j++) { System.out.print(" "); } for (int j = 1; j <= i; j++) { System.out.print("*"); } System.out.println(); } //到直角 for (int i = 1; i <=5 ; i++) { for (int j = 4; j >=i ; j--) { System.out.print("* "); } System.out.println(); } //也是到直角不一样的 for (int s = 1; s <= 4; s++) { for (int x = 2; x <= s; x++) { System.out.print(" ");//x从2开始，表示在第二行进行遍历循环输出空格，每行依次递增 } for (int b = 4; b >= s; b--) { System.out.print("*");//空格之后输出*，搞清楚这些符号的数字关系 } System.out.println(); }