List of all binary combinations for a number in Java

Question

I am working on a project involving \"Dynamic Programming\" and am struck on this trivial thing, please help.

Suppose I take 4 as an input, I want to display somethi

Answer 1

public void outBinary(int value){
   for (int i = 0; i < Math.pow(2, value); i++) {
       System.out.println(Integer.toBinaryString(i));
   }
}

with leading zeros something like that

    for (int i = 0; i < Math.pow(2, value); i++) {
        StringBuilder binary = new StringBuilder(Integer.toBinaryString(i));
        for(int j = binary.length(); j < value; j++) {
            binary.insert( 0, '0' );
        }
        System.out.println(binary);
    }