Method of Java base conversion

//2 turn ten
Integer.toBinaryString(int i);
//Eight turn ten
Integer.toOctalString(int i);
//16 turn ten
Integer.toHexString(int i);
 
10//2 turn ten
11Integer.valueOf("1010",2).toString();
12//Eight turn ten
13Integer.valueOf("8765",8).toString();
14//16 turn ten
15Integer.valueOf("FFFF",16).toString();