In | An Not in - place Java program to reverse an array ; Function to reverse arr [ ] from start to end ; Create a copy array and store reversed elements ; Now copy reversed elements back to arr [ ] ; Utility function to print an array ; Driver code
import java . util . * ; class GFG { public static void revereseArray ( int [ ] arr , int n ) { int [ ] rev = new int [ n ] ; for ( int i = 0 ; i < n ; i ++ ) rev [ n - i - 1 ] = arr [ i ] ; for ( int i = 0 ; i < n ; i ++ ) arr [ i ] = rev [ i ] ; } public 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 } ; int n = arr . length ; printArray ( arr , n ) ; revereseArray ( arr , n ) ; System . out . println ( " Reversed ▁ array ▁ is " ) ; printArray ( arr , n ) ; } }