Question

how do i write a method that takes an integer and an integer array and returns a Boolean indicating whether the integer can be found in the array or not in java

Answer 1

If you can use an ArrayList instead, you can use the existing method 'contains'.

If not, you could copy the implementation in java:
public boolean contains(Object o) {
return indexOf(o) >= 0;
}

where indexOf is:
public int indexOf(Object o) {
if (o == null) {
for (int i = 0; i < size; i++)
if (elementData[i]==null)
return i;
} else {
for (int i = 0; i < size; i++)
if (o.equals(elementData[i]))
return i;
}
return -1;
}



If you know the list is sorted, you can use a binary search.