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java Write a program to reverse an array or string

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Travinth Dayalaeaswaran answered on March 14, 2020 Popularity 9/10 Helpfulness 4/10

answer java Write a program to reverse an array or string

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java Write a program to reverse an array or string

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// Iterative java program to reverse an
// array
public class GFG {
     
   /* Function to reverse arr[] from
    start to end*/
    static void rvereseArray(int arr[],
                    int start, int end)
    {
        int temp;
          
        while (start < end)
        {
            temp = arr[start];
            arr[start] = arr[end];
            arr[end] = temp;
            start++;
            end--;
        }
    }    
      
    /* Utility that prints out an
    array on a line */
    static void printArray(int arr[],
                            int size)
    {
        for (int i = 0; i < size; i++)
             System.out.print(arr[i] + " ");
          
         System.out.println();
    }
 
    // Driver code
    public static void main(String args[]) {
         
        int arr[] = {1, 2, 3, 4, 5, 6};
        printArray(arr, 6);
        rvereseArray(arr, 0, 5);
        System.out.print("Reversed array is \n");
        printArray(arr, 6);
        
    }
}

Popularity 9/10 Helpfulness 4/10 Language java

Source: www.geeksforgeeks.org

Tags: java reverse string

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Contributed on Jul 08 2022

Travinth Dayalaeaswaran

0 Answers Avg Quality 2/10

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reverse string in java

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String reverse = new StringBuilder(string).reverse().toString();

Popularity 10/10 Helpfulness 6/10 Language java

Source: Grepper

Tags: java

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Contributed on Jul 19 2021

Kirk-Patrick Brown

0 Answers Avg Quality 2/10

reverse a string in java

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public class StringReverseExample{
   public static void main(String[] args) {
      String string = "abcdef";
      String reverse = new StringBuffer(string).reverse().toString();
      System.out.println("\nString before reverse: "+string);
      System.out.println("String after reverse: "+reverse);
   }
}

Popularity 10/10 Helpfulness 5/10 Language java

Source: www.tutorialspoint.com

Tags: java

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Contributed on Aug 20 2021

Ahmad Mujtaba

0 Answers Avg Quality 2/10

how to reverse a string in java

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public class ReverseString {
    public static void main(String[] args) {
        String s1 = "neelendra";
        for(int i=s1.length()-1;i>=0;i--)
            {
                System.out.print(s1.charAt(i));
            }
    }
}

Popularity 10/10 Helpfulness 5/10 Language java

Source: stackoverflow.com

Tags: java

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Contributed on Mar 14 2020

Annoying Anaconda

0 Answers Avg Quality 2/10

Reverse a String in Java

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public class ReverseStringByFavTutor

{

   public static void main(String[] args) {


       String stringExample  =  "FavTutor";

       System.out.println("Original string: "+stringExample);


       // Declaring a StringBuilder and converting string to StringBuilder

       StringBuilder reverseString = new StringBuilder(stringExample);


       reverseString.reverse();  // Reversing the StringBuilder


       // Converting StringBuilder to String

       String result = reverseString.toString();


       System.out.println("Reversed string: "+result); // Printing the reversed String


   }

}

Popularity 10/10 Helpfulness 4/10 Language java

Source: favtutor.com

Tags: java

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Contributed on Jan 24 2022

Itchy Impala

0 Answers Avg Quality 2/10

reverse a string in java

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// Not the best way i know but i wanted to challenge myself to do it this way so :)
public static String reverse(String str) {
  char[] oldCharArray = str.toCharArray();
  char[] newCharArray= new char[oldCharArray.length];
  int currentChar = oldCharArray.length-1;
  for (char c : oldCharArray) {
    newCharArray[currentChar] = c;
    currentChar--;
  }
  return new String(newCharArray);
}

Popularity 10/10 Helpfulness 4/10 Language java

Source: Grepper

Tags: inverse

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Contributed on Feb 11 2021

BradBot_1

0 Answers Avg Quality 2/10

Java Program to reverse a String

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package com.javaguides.strings.examples;

/**
 * 5 ways to reverse a String in Java
 * @author javaguides.net
 *
 */
public class ReverseString5Ways {

    public static void main(String[] args) {
        reverseWithStringConcat("javaguides");
        reverseWithStringBuilder("javaguides");
        reverseWithStringBuilderBuiltinMethod("javaguides");
        reverseWithSwaps("javaguides");
        reverseWithXOR("javaguides");
    }

    public static final String reverseWithStringConcat(String string) {
        String output = new String();
        for (int i = (string.length() - 1); i >= 0; i--) {
            output += (string.charAt(i));
        }

        display(string, output);
        return output;
    }

    public static final String reverseWithStringBuilder(String string) {
        final StringBuilder builder = new StringBuilder();
        for (int i = (string.length() - 1); i >= 0; i--) {
            builder.append(string.charAt(i));
        }
        display(string, builder.toString());
        return builder.toString();
    }

    public static final String reverseWithStringBuilderBuiltinMethod(String string) {
        final StringBuilder builder = new StringBuilder(string);
        display(string, builder.reverse().toString());
        return builder.reverse().toString();
    }

    public static final String reverseWithSwaps(String string) {
        final char[] array = string.toCharArray();
        final int length = array.length - 1;
        final int half = (int) Math.floor(array.length / 2);

        char c;
        for (int i = length; i >= half; i--) {
            c = array[length - i];
            array[length - i] = array[i];
            array[i] = c;
        }
        display(string, String.valueOf(array));
        return String.valueOf(array);
    }

    public static final String reverseWithXOR(String string) {
        final char[] array = string.toCharArray();
        final int length = array.length;
        final int half = (int) Math.floor(array.length / 2);

        for (int i = 0; i < half; i++) {
            array[i] ^= array[length - i - 1];
            array[length - i - 1] ^= array[i];
            array[i] ^= array[length - i - 1];
        }
        display(string, String.valueOf(array));
        return String.valueOf(array);
    }


    private static final void display(String original, String reverse) {
        System.out.println(original);
        System.out.println(reverse);
        System.out.println("----------------------------");
    }
}

Popularity 9/10 Helpfulness 2/10 Language java

Source: www.javaguides.net

Tags: java

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Contributed on Dec 17 2022

Deepika Sahu

0 Answers Avg Quality 2/10

reverse string in java

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public static String reverse(String str) 
{
    String rev="";
    char[] finalarray = str.toCharArray();
    for (int i = finalarray.length - 1; i >= 0; i--)
        rev+=finalarray[i];
    return rev;
}
//Sample Input- "Scaler Academy"
//Sample Output-"ymedacA relacS"

Popularity 1/10 Helpfulness 1/10 Language java

Source: www.scaler.com

Tags: java reverse string

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Contributed on Feb 07 2022

codelearner

0 Answers Avg Quality 2/10

java Write a program to reverse an array or string

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