总结:对于每行的难点,重点在于利用循环条件,构造目标所述的情况
package com.raystorm.test; public class PrintRhombus { void print(int lineNumber) { for (int i = 1; i < lineNumber; i ++) { for (int j = 0; j < lineNumber - i; j ++) { System.out.print(" "); } for (int j = 1; j < 2 * i; j ++) { System.out.print("*"); } System.out.println(""); } for (int i = 0; i < lineNumber; i ++) { for (int j = 0; j < i; j ++) { System.out.print(" "); } for (int j = 2 * (lineNumber - i) - 1; j > 0; j --) { System.out.print("*"); } System.out.println(""); } } public static void main(String[] args) { PrintRhombus printRhombus = new PrintRhombus(); printRhombus.print(3); } }
What a stupid answer is the first answer. Even I can't understand by myself!