Core Java Programming Challenges #22 | Coding Challenges | Naresh IT

Core Java Programming Challenges #22 | Coding Challenges | Naresh IT

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[cricbuffofficial]

public class Test{

public static void main(String[] args)
{
int[] arr={10, 20, 30, 40, 50, 60, 70};

int temp;
int n=arr.length;



for(int i=0;i<n/2;i++)
{
temp=arr[i];
arr[i]=arr[n-i-1];
arr[n-i-1]=temp;

}

for(int i:arr)
{
System.out.println(i);
}
}

}

[prakashgoel]

public static void main(String[] args) {
int ar[]= {1, 2, 3, 4, 5, 6, 7, 8};
for(int i=0;i<ar.length/2;i++) {
// reverse array
int temp=ar[i];
ar[i]=ar[ar.length-1-i];
ar[ar.length-1-i]=temp;
}
for(int i=0;i<ar.length;i++) {
// print array
System.out.print(ar[i]+" ");
}
}

[Yogesh-ldjs]

class Challenge22{
public static void main(String[] args) {
int[] a={1, 2, 3, 4, 5};
int i=0;
int j=a.length-1;
System.out.println(j);
while(i<j){
int temp=a[i];
a[i]=a[j];
a[j]=temp;
i++;
j--;
}
System.out.println("Array in descending order:");
for(int k=0;k<a.length;k++){
System.out.println(a[k]);
}

}
}

[samahmahdi]

import java.util.Arrays;

public class Challenge22 {
public static void main(String[] args) {
int a[] = {5, 7, 1, 4, 9};
int j = a.length-1, temp;
System.out.println("The original array"+Arrays.toString(a));
for(int i = 0;i <(a.length-1)/2;i++){
temp = a[i];
a[i] = a[j];
a[j] = temp;
j--;
}
System.out.println("The reveresed array"+Arrays.toString(a));
}
}

[MaulikSakhida]

public class Test {

public static void main(String[] args){
int[] arr = {1, 2, 3, 4, 5, 6, 7, 8};
int i = 0;
int j = arr.length-1;

while(i < j){
swap(arr, i, j);
i++;
j--;
}

}


private static void swap(int[] arr, int i, int j) {
int temp = arr[i];
arr[i] = arr[j];
arr[j] = temp;
}
}

[Sougata_]

public class JavaChallenge
{
public static void main(String[] args)
{
int arr[] = {2, 4, 1, 7, 3};
int i = 0;
int j = arr.length - 1;
int temp;
while(i<j)
{
temp = arr[i];
arr[i] = arr[j];
arr[j] =temp;
i++;
j--;
}
for(int x=0;x<arr.length;x++)
{
System.out.println(arr[x]+" ");
}
}
}

[pranavkaushal]

public static void main(String[] args) {
int c1[]= new int[]{1, 2, 3, 4, 5};

for(int i=0, j=c1.length-1;i<c1.length && j>=0;i++, j-- ) {
if(i==j) {
break;
}else {
int a = c1[i];
int b= c1[j];
c1[i]=b;
c1[j]=a;
}//else
}//for

}

[itisdawit]

public class CodeChallenge22_ReverseArray {


public static void main(String[] args) {
int[] a = { 5, 7, 66, 3, 33, 8 };
int mx_len = a.length;


for (int i = 0; i < a.length; i++) {


if (i < mx_len / 2) {
int b = a[i];
int e = a[mx_len - i - 1];


a[i] = e;
a[mx_len - i - 1] = b;
}
}
for (int z = 0; z < a.length; z++) {
System.out.print(a[z] + " ");
}



}


}

[gsrcreations]

// Recursive method used in this program
import java.io.*;
class ReverseArray {

/* Function to reverse arr[] from start to end*/
static void reverseArray(int arr[], int start, int end)
{
int temp;
if (start >= end)
return;
temp = arr[start];
arr[start] = arr[end];
arr[end] = temp;
reverseArray(arr, start+1, end-1);
}

// method to print array

static void printArray(int arr[], int size)
{
for (int i=0; i < size; i++)
System.out.print(arr[i] + " ");
System.out.println("");
}
public static void main (String[] args) {
int arr[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
printArray(arr, 10);
reverseArray(arr, 0, 9);
System.out.println("Reversed array is ");
printArray(arr, 10);
}
}