reverse array code did not work about java-se HOT 5 OPEN

that's right

from java-se.

In for loop of reversing array there should be i-- not i++.

Try this..

reverseofArray.txt

from java-se.

That's right, Here's what the code does:

The code declares a new integer array 'a' with some initial values {1, 2, 3, 4, 5, 6, 7, 8}.

It declares a new integer array 'b' with the same length as array 'a'.

It uses 'a' for loop to iterate through array 'a' from the end to the beginning. During each iteration, it assigns the current value of 'a[i]' to the corresponding position in array 'b', starting from the beginning.

Finally, it uses a for-each loop to print out each element in array 'b' in the reversed order.

So the output of the program would be:' 8 7 6 5 4 3 2 1'.

from java-se.

try this

public class MyClass {
public static void main(String args[]) {

     int x[]={1, 2, 3, 4, 5, 6, 7, 8};
//not reverse this array x
//first create a array of same length as 'x'
     int y[]=new int[x.length];
//now traverse all the elements of x and assign to y in reverse manner
 for(int i=0;i<x.length;i++)
 {
     //here we are assigning element of y in reverse manner
     y[i]=x[x.length-i-1];
 }
    
    for(int X:y) 
    {
      System.out.print(X+",");
    }
        
        
}

}

from java-se.

it is also possible to reverse the same array using constant space with O(n) time complexity .//

class Main {
    public static void main(String[] args) {
        int[] array = {1,2,3,4,5};
        
        **// it just return the array in reverse manner without any extra space or any temp array //**
        for (int i = array.length-1; i>=0; i--) {
            System.out.print(array[i] +" ");
        }
    }
}

from java-se.