Let’s take a look at this simple snippet that could hide a trap:
public class JavaCertification {
public static void main(String [] args) {
int a[] = {1, 2, 3, 4, };
System.out.println("Number of elements: " + a.length);
}
}
We see that in the initialization of the array there is an extra comma after the last element, which could make us thinking of a compilation error.
Actually, the code compiles perfectly and produces the following result:
Number of elements: 4
- There is no compilation error.
- It does not create a further element initialized with the default value of the type of the array.