Programmierung 2 - Praktikum
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package ha01;
import java.util.Arrays;
public class ArrayManipulation {
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;
}
/*Liefert ein neues Array zurück ohne das erste Element*/
public static int[] removeFirst(int[] arr) {
int [] arrNeu = {};
arrNeu = new int[arr.length-1];
if(arr.length != 0) {
for (int i = 1; i < arr.length; i++) {
arrNeu[i-1] = arr[i];
}
}
return arrNeu;
}
/*Erstellt ein neues Array ohne das letzte Element*/
public static int[] removeLast(int[] arr) {
int [] arrNeu = {};
arrNeu = new int[arr.length-1];
if(arr.length != 0) {
for (int i =0; i < arr.length -1; i++) {
arrNeu[i] = arr[i];
}
}
return arrNeu;
}
/*Erstellt ein neues Array wo alle Zahlen quadriert werden*/
public static int[] squareEach(int[] arr) {
int [] arrNeu = {};
arrNeu = new int[arr.length];
for (int i=0; i <arr.length; i++) {
arrNeu[i] = arr[i] * arr[i];
}
return arrNeu;
}
public static void main(String[] args) {
int[] arr = {1,2,3,4,5};
int [] arr2 = {};
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)));
}
}