Thursday Java programming challenge, let's see who cracks it 😀. Method overloading using null.

[im-ahmed-hasan]

public class OverloadTest {
public static void main(String[] args) {
test(null);
}

public static void test(String s) {
System.out.println("String");
}

public static void test(Integer i) {
System.out.println("Integer");
}
}

what will be the output?

[aysha-siddqua]

The code actually won’t compile. When you call test(null), Java can’t decide between String and int, both are valid matches for null and neither is more specific than the other. So the compiler throws an ‘ambiguous method call’ error.