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