Java Coding Problems

Check only for the first index

For an array of primitives, the simplest implementation speaks for itself:

public static int findIndexOfElement(int[] arr, int toFind) {  for (int i = 0; i < arr.length; i++) {    if (arr[i] == toFind) {      return i;    }  }  return -1;}

Relying on Java 8 functional style, we can try to loop the array and filter the elements that match the given element. In the end, simply return the first found element:

public static int findIndexOfElement(int[] arr, int toFind) {  return IntStream.range(0, arr.length)    .filter(i -> toFind == arr[i])    .findFirst()    .orElse(-1);}

For an array of Object, there are at least three approaches. In the first instance, we can rely on the equals() contract:

public static <T> int findIndexOfElementObject(T[] ...