Convert from Decimal to Binary, Octal or Hex using java

Use Integer.toString(int input, int radix) to convert from an Integer to any type of base number.

Integer decimal1 = 21;
String binaryNumber = Integer.toString(decimal1, 2);
System.out.println(decimal1 + " in Base 2 : " + binaryNumber);
Integer decimal2 = 302;
String octalNumber = Integer.toString(decimal2, 8);
System.out.println(decimal2 + " in Base 8 : " + octalNumber);
Integer decimal3 = 43981;
String hexNumber = Integer.toString(decimal3, 16);
System.out.println(decimal2 + " in Base 16 : " + hexNumber);
Output:
21 in Base 2 : 10101
302 in Base 8 : 456
43981 in Base 16 : abcd

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