How to do base conversion in Java

This is a method of performing base conversion in Java. Since it uses only the standard library, you can copy and paste it immediately.

Convert from binary

Binary-> 8

Java

final String bin = "11111110";
final int dec = Integer.parseInt(bin, 2);
final String oct = Integer.toOctalString(dec);
System.out.println(oct);

output

376

Binary-> Decimal

Java

final String bin = "11111110";
final int dec = Integer.parseInt(bin, 2);
System.out.println(dec);

output

254

Binary-> Hexagon

Java

final String bin = "11111110";
final int dec = Integer.parseInt(bin, 2);
final String hex = Integer.toHexString(dec);
System.out.println(hex);

output

fe

Binary-> 32-base

Java

final String bin = "11111110";
final int dec = Integer.parseInt(bin, 2);
final String base32 = Integer.toString(dec, 32);
System.out.println(base32);

output

7u

Binary-> n-ary

Java

final String bin = "11111110";
final int dec = Integer.parseInt(bin, 2);
final int n = 36;
final String base36 = Integer.toString(dec, n);
System.out.println(base36);

output

72

Convert from octal number

Eight-> binary

Java

final String oct = "376";
final int dec = Integer.parseInt(oct, 8);
final String bin = Integer.toBinaryString(dec);
System.out.println(bin);

output

11111110

8-> Decimal

Java

final String oct = "376";
final int dec = Integer.parseInt(oct, 8);
System.out.println(dec);

output

254

8-base-> hexadecimal

Java

final String oct = "376";
final int dec = Integer.parseInt(oct, 8);
final String hex = Integer.toHexString(dec);
System.out.println(hex);

output

fe

8-base-> 32-base

Java

final String oct = "376";
final int dec = Integer.parseInt(oct, 8);
final String base32 = Integer.toString(dec, 32);
System.out.println(base32);

output

7u

8-base-> n-ary

Java

final String oct = "376";
final int dec = Integer.parseInt(oct, 8);
final int n = 36;
final String base36 = Integer.toString(dec, n);
System.out.println(base36);

output

72

Convert from decimal

Decimal-> Binary

Java

final int dec = 254;
final String bin = Integer.toBinaryString(dec);
System.out.println(bin);

output

11111110

Decimal-> Decimal

Java

final int dec = 254;
final String oct = Integer.toOctalString(dec);
System.out.println(oct);

output

376

Decimal-> Decimal

Java

final int dec = 254;
final String hex = Integer.toHexString(dec);
System.out.println(hex);

output

fe

Decimal-> 32

Java

final int dec = 254;
final String base32 = Integer.toString(dec, 32);
System.out.println(base32);

output

7u

Decimal-> n-decimal

Java

final int dec = 254;
final int n = 36;
final String base36 = Integer.toString(dec, n);
System.out.println(base36);

output

72

Convert from hexadecimal

Hexagon-> Binary

Java

final String hex = "fe";
final int dec = Integer.parseInt(hex, 16);
final String bin = Integer.toBinaryString(dec);
System.out.println(bin);

output

11111110

Hexa-> octal

Java

final String hex = "fe";
final int dec = Integer.parseInt(hex, 16);
final String oct = Integer.toOctalString(dec);
System.out.println(oct);

output

376

Hexa-> Decimal

Java

final String hex = "fe";
final int dec = Integer.parseInt(hex, 16);
System.out.println(dec);

output

254

Hexagon-> 32 base

Java

final String hex = "fe";
final int dec = Integer.parseInt(hex, 16);
final String base32 = Integer.toString(dec, 32);
System.out.println(base32);

output

7u

Decimal-> n-decimal

Java

final String hex = "fe";
final int dec = Integer.parseInt(hex, 16);
final int n = 36;
final String base36 = Integer.toString(dec, n);
System.out.println(base36);

output

72

Convert from 32 base

32-base-> binary

Java

final String base32 = "7u";
final int dec = Integer.parseInt(base32, 32);
final String bin = Integer.toBinaryString(dec);
System.out.println(bin);

output

11111110

32-base-> octal number

Java

final String base32 = "7u";
final int dec = Integer.parseInt(base32, 32);
final String oct = Integer.toOctalString(dec);
System.out.println(oct);

output

376

32-> Decimal

Java

final String base32 = "7u";
final int dec = Integer.parseInt(base32, 32);
System.out.println(dec);

output

254

32-base-> hexadecimal

Java

final String base32 = "7u";
final int dec = Integer.parseInt(base32, 32);
final String hex = Integer.toHexString(dec);
System.out.println(hex);

output

fe

32-base-> n-ary

Java

final String base32 = "7u";
final int dec = Integer.parseInt(base32, 32);
final int n = 36;
final String base36 = Integer.toString(dec, n);
System.out.println(base36);

output

72

Convert from n-ary

n-ary-> binary

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
final String bin = Integer.toBinaryString(dec);
System.out.println(bin);

output

11111110

n-ary-> octal

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
final String oct = Integer.toOctalString(dec);
System.out.println(oct);

output

376

n-decimal number-> decimal number

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
System.out.println(dec);

output

254

n-ary-> hexadecimal

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
final String hex = Integer.toHexString(dec);
System.out.println(hex);

output

fe

n-ary-> 32-base

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
final String base32 = Integer.toString(dec, 32);
System.out.println(base32);

output

7u

n-ary-> m-ary

Java

final String base36 = "72";
final int n = 36;
final int dec = Integer.parseInt(base36, n);
final int m = 3;
final String base3 = Integer.toString(dec, m);
System.out.println(base3);

output

100102