2015/12/29 eclipse应用 输出三角形

 public class Myfirst {

     public static void main(String[] args) {
             System.out.println("hello world");
             System.out.println("");
             System.out.println("□□□□□□□");
             System.out.println("■■■□■■■");
             System.out.println("■■■□■■■");
             System.out.println("□□□□□□□");
             System.out.println("■■■□■■■");
             System.out.println("■■■□■■■");
             System.out.println("□□□□□□□");
             System.out.println("");
             System.out.println("▼▲▼▲▼");
             System.out.println(" ▼▲▼▼");
             System.out.println("  ▼▲▼");
             System.out.println("   ▼▼");
             System.out.println("    ▼");

     }
     }