### Java Convert Decimal to Binary

In this source code example, we will write a Java program that converts any Decimal number to a Binary number.
We show you two ways to convert any Decimal number to a Binary number:
1. The first method converts a decimal number to a binary number using a conventional algorithm.
2. The second method converts a decimal number to a binary number using a bitwise algorithm
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# Convert Decimal number to Binary number using a Conventional Algorithm

The first method converts a decimal number to a binary number using a conventional algorithm:
```package net.sourcecodeexamples.java.Conversions;

import java.util.Scanner;

/**
* This class converts a Decimal number to a Binary number
*
* @author https://www.sourcecodeexamples.net
*
*/
class DecimalToBinary {

/**
* Main Method
*
* @param args Command Line Arguments
*/
public static void main(String args[]) {
conventionalConversion();
}

/**
* This method converts a decimal number
* to a binary number using a conventional
* algorithm.
*/
public static void conventionalConversion() {
int n, b = 0, c = 0, d;
Scanner input = new Scanner(System.in);
System.out.printf("Conventional conversion.%n Enter the decimal number: ");
n = input.nextInt();
while (n != 0) {
d = n % 2;
b = b + d * (int) Math.pow(10, c++);
n /= 2;
} //converting decimal to binary
System.out.println("\tBinary number: " + b);
input.close();
}
}```

## Output

``````Conventional conversion.
Enter the decimal number: 20
Binary number: 10100``````

# Convert Decimal number to Binary number using a Bitwise Algorithm

The second method converts a decimal number to a binary number using a bitwise algorithm:
```package net.sourcecodeexamples.java.Conversions;

import java.util.Scanner;

/**
* This class converts a Decimal number to a Binary number
*
* @author https://www.sourcecodeexamples.net
*
*/
class DecimalToBinary {

/**
* Main Method
*
* @param args Command Line Arguments
*/
public static void main(String args[]) {
bitwiseConversion();
}

/**
* This method converts a decimal number
* to a binary number using a bitwise
* algorithm
*/
public static void bitwiseConversion() {
int n, b = 0, c = 0, d;
Scanner input = new Scanner(System.in);
System.out.printf("Bitwise conversion.%n Enter the decimal number: ");
n = input.nextInt();
while (n != 0) {
d = (n & 1);
b += d * (int) Math.pow(10, c++);
n >>= 1;
}
System.out.println("\tBinary number: " + b);
input.close();
}
}```

## Output

``````Bitwise conversion.
Enter the decimal number: 20
Binary number: 10100``````
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