| Basic Programes |
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| Other Program |
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Q. Write a program to receive an integer and find its octal, hexadecimal and binary equivalent.
Below is a Java program that receives an integer from the user and prints its octal, hexadecimal, and binary equivalents.
import java.util.Scanner;
public class NumberConversion {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("Enter an integer: ");
int num = scanner.nextInt();
// Print octal equivalent
String octal = Integer.toOctalString(num);
System.out.println("Octal equivalent: " + octal);
// Print hexadecimal equivalent
String hexadecimal = Integer.toHexString(num).toUpperCase();
System.out.println("Hexadecimal equivalent: " + hexadecimal);
// Print binary equivalent
String binary = Integer.toBinaryString(num);
System.out.println("Binary equivalent: " + binary);
scanner.close();
}
}
Explanation:
Import Statement:
import java.util.Scanner;is used to include the Scanner class for user input.
Main Method:
- A
Scannerobject is created to read input from the user. - The user is prompted to enter an integer, which is stored in the variable
num. - The
Integer.toOctalString(int i)method converts the integer to its octal string representation. - The
Integer.toHexString(int i)method converts the integer to its hexadecimal string representation. The result is converted to uppercase for consistent formatting. - The
Integer.toBinaryString(int i)method converts the integer to its binary string representation. - The results are printed to the console.
- A
Sample Output:
Enter an integer: 42
Octal equivalent: 52
Hexadecimal equivalent: 2A
Binary equivalent: 101010
To run this program, save it in a file named NumberConversion.java, compile it using javac NumberConversion.java, and run it using java NumberConversion. The program will prompt you to enter an integer and then display its octal, hexadecimal, and binary equivalents.
Simple program
public class NumberConversion {
public static void main(String[] args) {
// Check if an integer is provided as command-line argument
if (args.length == 0) {
System.out.println("Usage: java NumberConversion <integer>");
return;
}
// Parse the integer from command-line argument
int num = Integer.parseInt(args[0]);
// Print octal equivalent
String octal = Integer.toOctalString(num);
System.out.println("Octal equivalent: " + octal);
// Print hexadecimal equivalent
String hexadecimal = Integer.toHexString(num).toUpperCase();
System.out.println("Hexadecimal equivalent: " + hexadecimal);
// Print binary equivalent
String binary = Integer.toBinaryString(num);
System.out.println("Binary equivalent: " + binary);
}
}
Explanation:
- Main Method:
- The program checks if at least one command-line argument is provided.
- If no argument is provided, it prints a usage message and exits.
- Otherwise, it parses the first command-line argument as an integer using
Integer.parseInt(). - Then, it converts the integer to its octal, hexadecimal, and binary representations using
Integer.toOctalString(),Integer.toHexString(), andInteger.toBinaryString()respectively. - Finally, it prints the results to the console.
Sample Output:
$ java NumberConversion 255
Octal equivalent: 377
Hexadecimal equivalent: FF
Binary equivalent: 11111111
This program takes an integer as a command-line argument and then displays its octal, hexadecimal, and binary equivalents.
