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Java Tutorial For Beginners: Part 6.

Java Program To Reverse A Number Using Recursion (OOP)
import java.util.Scanner;
public class ReverseNumberUsingClassA {
private static Scanner sc;

public static void main(String[] args) {
int Number, Reverse = 0;
sc = new Scanner(System.in);

System.out.print("Enter Any Number You Want To Reverse: ");
Number = sc.nextInt();

ReverseNumberUsingClassB rn = new ReverseNumberUsingClassB();
Reverse = rn.NumberReverse(Number);
System.out.format("\nReverse Of %d = %d",Number, Reverse);
}}

ReverseNumberUsingClassB.java:
public class ReverseNumberUsingClassB {
int Reverse = 0, Reminder;

public int NumberReverse(int Number) {
if(Number > 0) {
Reminder = Number %10;

Reverse = Reverse * 10+ Reminder;
NumberReverse(Number /10);
}
return Reverse;
}}

Java Program To Reverse A Number Using For Loop
import java.util.Scanner;
public class ReverseNumberUsingFor {
private static Scanner sc;

public static void main(String[] args) {
int Number, Reminder, Reverse;
sc = new Scanner(System.in);

System.out.print("Enter Any Number You Want To Reverse: ");
Number = sc.nextInt(); 
int temp = Number;  // not necessary in the code

for(Reverse = 0; Number > 0; Number = Number/10) {
Reminder = Number %10;
Reverse = Reverse * 10 + Reminder;
}
System.out.format("\nReverse Of %d = %d",temp, Reverse); 
}}

Java Program To Reverse A Number Using Method() Function
import java.util.Scanner;
public class ReverseNumberUsingMethods {
private static Scanner sc;

private static int Reverse = 0;
public static void main(String[] args) {
int Number;

sc = new Scanner(System.in);
System.out.print("Enter Any Number You Want To Reverse: ");
Number = sc.nextInt();

Reverse = ReverseNumber(Number);
System.out.format("\nReverse Of %d = %d",Number, Reverse);
}

public static int ReverseNumber(int Number) {
int Reminder;

while(Number > 0) {
Reminder = Number %10;

Reverse = Reverse * 10 + Reminder;
Number = Number /10;
}
return Reverse;
}}

Java Program To Reverse A Number Using Reverse Function
import java.util.Scanner;

public class ReverseNumberUsingSTring {
private static Scanner sc;

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

System.out.print("Enter Any Number You Want To Reverse: ");
number = sc.nextInt();
int temp = number;  // not necessary in the code

String str = Integer.toString(number);
String reverse = new StringBuffer(str).reverse().toString();
System.out.format("\nReverse Of %d = %s",temp, reverse); 
}}

Java Program To Reverse A Number Using While Loop
import java.util.Scanner;
public class ReverseNumberUsingWhile {
private static Scanner sc;

public static void main(String[] args) {
int Number, Reminder, Reverse = 0;
sc = new Scanner(System.in);

System.out.print("Enter Any Number You Want To Reverse: ");
Number = sc.nextInt(); 
int temp = Number;  // not necessary in the code

while(Number > 0) {
Reminder = Number %10;
Reverse = Reverse * 10 + Reminder;
Number = Number /10;
}
System.out.format("\nReverse Of %d = %d",temp, Reverse); 
}}
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