Catching ArrayStoreException at Compile-time

Question

Consider the following test of Java\'s ArrayList#toArray method. Note that I borrowed the code from this helpful answer.

public class GenericTest {
         


        

Answer 1

The ArrayStoreException is runtime exception not compile time and thrown at run time and it indicates that different type of object is being stored in the array. Object x[] = new String[3]; x[0] = new Integer(0); The only way you can find it at compile time is by using <Integer> type as below

foo.toArray(new String[10]); 

The above will throw compile time error as The parameterized method toArray(Integer[]) of type List is not applicable for the arguments (String[]).