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Denise Schwindt 3 years ago
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      ArrayManipulation.java

54
ArrayManipulation.java

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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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