1 int Number=1234567908;
2 StringBuffer numberSB=new StringBuffer(Number+"");
3 int index=numberSB.length();
4 while(true) {
5 index=index-3;
6 numberSB.insert(index, ",");
7 if(index<=3) {
8 break;
9 }
10 }
11 System.out.println(numberSB.toString());
1 int Number=1234567908;
2 String