19 Aug How to Convert binary to decimal in Java

To convert binary to decimal in Java, let us see an example first. Let’s say we have the following binary:

0100

To get the decimal number from the binary, use the parseInt() method. The syntax is as follows:

static int parseInt(String str, int radix)

Here, str is the binary value as string and radix should be 2 for binary.

Let us now see an example to convert binary to decimal in Java:

Example 1

public class Example
{
   public static void main(String args[] )
   {
       String str = "0100";
       
       System.out.println("Converting Binary to Decimal = "+Integer.parseInt(str, 2));
   }
}

Output

Converting Binary to Decimal = 10

Example 2

public class Example
{
   public static void main(String args[] )
   {
       String str = "111111";
       
       System.out.println("Converting Binary to Decimal = "+Integer.parseInt(str, 2));
   }
}

Output

Converting Binary to Decimal = 63