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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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//temp array erstellen, mit einer stelle weniger |
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int[] temp = new int[arr.length - 1]; |
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//Zahlen Rüberkopieren, bis auf die erste |
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for (int i = 1, k = 0; i < arr.length; i++) { |
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temp[k++] = arr[i]; |
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} |
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return temp; |
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} |
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public static int[] removeLast(int[] arr) { |
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//temp array erstellen, mit einer stelle weniger |
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int[] temp = new int[arr.length - 1]; |
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//Zahlen Rüberkopieren, bis auf das letzte |
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for (int i = 0, k = 0; i < temp.length; i++) { |
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temp[k++] = arr[i]; |
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} |
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return temp; |
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} |
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public static int[] squareEach(int[] arr) { |
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for (int i = 0; i < arr.length; i++) { |
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int tmp = arr[i]; |
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arr[i] = tmp*tmp; |
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} |
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return arr; |
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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(arr)); |
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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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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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//temp array erstellen, mit einer stelle weniger |
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int[] temp = new int[arr.length - 1]; |
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//Zahlen Rüberkopieren, bis auf die erste |
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for (int i = 1, k = 0; i < arr.length; i++) { |
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temp[k++] = arr[i]; |
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} |
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return temp; |
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} |
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public static int[] removeLast(int[] arr) { |
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//temp array erstellen, mit einer stelle weniger |
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int[] temp = new int[arr.length - 1]; |
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//Zahlen Rüberkopieren, bis auf das letzte |
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for (int i = 0, k = 0; i < temp.length; i++) { |
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temp[k++] = arr[i]; |
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} |
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return temp; |
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} |
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public static int[] squareEach(int[] arr) { |
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for (int i = 0; i < arr.length; i++) { |
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int tmp = arr[i]; |
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arr[i] = tmp*tmp; |
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} |
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return arr; |
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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(arr)); |
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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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} |