Convert Binary String to Binary

Question

How do I convert a String written as Binary, to binary (in byte array)?

If I have a String:

String binary = "0000"

I want the binary data to be 0000.

below is what happens when I set the binary to a byte array (which in turn returns 48, which is ASCII)

Binary String: 0000 Binary Byte array: 48 Binary Byte array: 48 Binary Byte array: 48 Binary Byte array: 48

I'm not good at explaining so hopefully the above example was enough to tell you what I want.

EDIT: This is to set the data into a binary file.

Answer 1

Use this:

    System.out.println(Integer.toBinaryString(Integer.parseInt("000",2))); // gives 0
    System.out.println(Integer.toBinaryString(Integer.parseInt("010",2))); // gives 10
    System.out.println(Integer.toBinaryString(Integer.parseInt("100",2))); // gives 100