1 import java.text.*;
2 public class Gxjun
3 {
4 public static void main(String args[] )
5 {
6 int n=123456789;
7 System.out.println("整数"+"按千分组号(带正好)");
8 String s=String.format("%,+d",n);
9 System.out.println(s);
10 double number = 98765.6789 ;
11 System.out.println(number+"格式化为整数7位,小数3位");
12 s=String.format("%011.3f",number);
13 System.out.println(s);
14 }
15 }