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48 lines
1.4 KiB
48 lines
1.4 KiB
import java.util.Arrays;
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public class ArrayManipulation {
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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[] help = new int[arr.length - 1];
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for(int i=1; i < arr.length; i++){ //nico.schroeder@informatik.hs-fulda.de
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help[i-1] = arr[i];
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}
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return help;
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}
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public static int[] removeLast(int[] arr){
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int[] help = new int[arr.length-1];
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for(int i=0; i<arr.length-1; i++){
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help[i]=arr[i];
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}
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return help;
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}
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public static int[] squareEach(int[] arr){
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int[] square= new int[arr.length];
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for(int i= 0; i<arr.length; i++){
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square[i] = arr[i]*arr[i];
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}
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return square;
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}
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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(squareEach(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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}
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}
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