How to convert big int number to Binary ? - Java

Question

I am trying to convert int to binary and i am doing below code.

public static String intToBinary16Bit(String strInt) {
        String bin = Integer.toBinaryString(strInt);
        return String.format("%016d", Integer.parseInt(bin));
    }

So, if i am giving strInt = 0211 than it is working fine and giving the output 0000001000010001.

But, if i am giving strInt = 4527 than it is throwing NumberFormateException.

How can I resolved this issue ?

Your code cannot compile. `Integer.toBinaryString()` expects an int as an argument, not a String — fge, Feb 20 '15 at 14:47

Murtaza Khursheed Hussain · Answer 1 · 2015-02-20T18:36:49.007

1

Try the following method, it uses recursion for conversion.

  private static void toBinary(int number) {
        int remainder;

        if (number <= 1) {
            System.out.print(number);
            return;
        }

        remainder = number % 2; 
        toBinary(number >> 1);
        System.out.println(remainder);
    }

edited Feb 20 '15 at 18:36

answered Feb 20 '15 at 14:44

Murtaza Khursheed Hussain

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It is working, but it is showing only in 12 bit. can you please tell me how can i formate it in 16 bit? – Vid Feb 20 '15 at 15:04
just check the length of the `remainder` and prepend `0` in the string. thats it. – Murtaza Khursheed Hussain Feb 20 '15 at 18:36

score 1 · Accepted Answer · edited May 23 '17 at 12:18

1

Try what eznme suggests here:

public class A {
    public static void main(String[] args) {

        int a = Integer.parseInt(args[0]);
        System.out.println(a);

        int bit=1;
        for(int i=0; i<32; i++) {
            System.out.print("  "+(((a&bit)==0)?0:1));
            bit*=2;
        }
    }
}

edited May 23 '17 at 12:18

Community

1
1

answered Feb 20 '15 at 14:44

Fahim

12,198
5
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score 0 · Answer 3 · edited May 23 '17 at 12:34

0

You try:

Long.toBinaryString(2199023255552L);

Java long to binary

edited May 23 '17 at 12:34

Community

1
1

answered Feb 20 '15 at 14:48

Lê Đức Anh

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How to convert big int number to Binary ? - Java

3 Answers3