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import java.util.Arrays;
public class ArrayManipulation {
public static void main(String[] args) { int[] arr = {1,2,3,4,5}; System.out.println(Arrays.toString(reverseArray(arr))); System.out.println(Arrays.toString(removeFirst(arr))); System.out.println(Arrays.toString(removeLast(arr))); System.out.println(Arrays.toString(squareEach(arr))); }
public static int[] reverseArray(int[] arr) {
for (int i = 0; i < arr.length / 2; i++) { int tmp = arr[i]; arr[i] = arr[arr.length - 1 - i]; arr[arr.length - 1 - i] = tmp; } return arr;
}
public static int[] removeFirst(int[] arr) { int[] arr1 = new int[arr.length - 1]; for (int j = 0; j < arr1.length; j++) { arr1[j] = arr[j + 1];
}
return arr1; }
public static int[] removeLast(int[] arr) { int[] arr1 = new int[arr.length - 1]; for (int j = 0; j < arr.length - 1; j++) { arr1[j] = arr[j];
}
return arr1; }
public static int[] squareEach(int[] arr) { int[] arr1 = new int[arr.length]; for (int j = 0; j < arr.length; j++) { arr1[j] = arr[j] * arr[j];
}
return arr1; } }
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