Converting Decimal to Binary Java

Question

I am trying to convert decimal to binary numbers from the user's input using Java.

I'm getting errors.

package reversedBinary; import java.util.Scanner;  public class ReversedBinary {   public static void main(String[] args) {     int number;       Scanner in = new Scanner(System.in);      System.out.println("Enter a positive integer");     number=in.nextInt();      if (number <0)         System.out.println("Error: Not a positive integer");     else {           System.out.print("Convert to binary is:");         System.out.print(binaryform(number)); }  }  private static Object binaryform(int number) {     int remainder;      if (number <=1) {         System.out.print(number);      }      remainder= number %2;      binaryform(number >>1);     System.out.print(remainder);      {      return null; } } } 

How do I convert Decimal to Binary in Java?

Answer 1

Integer.toBinaryString() is an in-built method and will do quite well.

Answer 2

Integer.toString(n,8) // decimal to octal  Integer.toString(n,2) // decimal to binary  Integer.toString(n,16) //decimal to Hex 

where n = decimal number.