Decimal to binary in java with explanation

  • on February 4, 2019
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Hello Friends! Welcome to Programming Shortcut only programming,
Today we’ll discuss how to convert a decimal to binary in java. there are two methods to convert decimal to binary:

1. Decimal to binary in java with array using while loop,

2. Decimal to binary in java without array using while loop.

Decimal to binary in java

import java.util.Scanner;
public class DecimaltoBinary  {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        int a[] = new int[1000];
        System.out.println(“Enter a Decimal number to convert binary”);
        int decimalnum = in.nextInt();
        int temp = decimalnum; //the taken number to save take temp variable.
        int n = 0;
        while (temp > 0) { // checking the number to till ‘0’
            int rem = temp % 2; // taking remainder of number
            temp = temp / 2; // after taking remainder update the number
            a[n] = rem;  // store the remainder into a array
            n++;
        }

//print the array in reverse order
        System.out.print(“The binary of ” + decimalnum + ” is: “);
        for (int i = n – 1; i >= 0; i–) {
            System.out.print(a[i]);
        }
        System.out.println(“n”);
    }
}

Output:
Enter a Decimal number to convert binary
23
The binary of 23 is: 10111

Decimal to binary in java without array

import java.util.Scanner;
public class DecimaltoBinary  {

    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.println(“Enter a Decimal number to convert binary”);
        int num = input.nextInt();
        int n = num;
        String temp = “”;
        while (n > 0) {
            int rem = n % 2;
            n = n / 2;
            temp = temp + rem;
        }
        String bin = new StringBuffer(temp).reverse().toString();

        System.out.println(“The binary number of ” + num + ” is: ” + bin);
    }
}

Output:
Enter a Decimal number to convert binary
24
The binary number of 24 is: 11000

Note: if adding in the String value store in the last of string value

 For example:
 String frist= “Programming”;
 String last=”Shortcut”;
 String name= frist+last;
 System.out.println(name);

 output: ProgrammingShotcut

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