Conversor Bin/Oct/Hex/ en Java.código.

A. Input

public class DataConversion{
public static void main(String[] args) {
System.out.println("Data types conversion example!");
int in = 50;
System.out.println("Integer: " + in);
//integer to binary
String by = Integer.toBinaryString(in);
System.out.println("Byte: " + by);
//integer to hexadecimal
String hex = Integer.toHexString(in);
System.out.println("Hexa decimal: " + hex);
//integer to octal
String oct = Integer.toOctalString(in);
System.out.println("Octal: " + oct);
}
}

B. Output.

C:\vinod\Math_package>javac DataConversion.java

C:\vinod\Math_package>java DataConversion
Data types conversion example!
Integer: 50
Byte: 110010
Hexa decimal: 32
Octal: 62

fuente: http://www.roseindia.net/java/beginners/DataConversion.shtml