JuniorTheoryCommon

What does the program print?

JAVA

public class Main {
    static void f(int x) { System.out.print("int"); }
    static void f(double x) { System.out.print("double"); }
    public static void main(String[] args) {
        f(5);
        f(5.0);
        f('a');
    }
}

intdoubleint

Expecting intdoubledouble: with no f(char), the compiler takes the nearest widening, and char widens to int before double.
Expecting a compile error: a missing exact match is not an error when widening the argument finds a version that fits.

Which version runs for f(5L), and why?
Why can two methods not differ only in their result type?

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Back to questions

JuniorTheoryCommon

What does the program print?

JAVA

public class Main {
    static void f(int x) { System.out.print("int"); }
    static void f(double x) { System.out.print("double"); }
    public static void main(String[] args) {
        f(5);
        f(5.0);
        f('a');
    }
}

intdoubleint

Expecting intdoubledouble: with no f(char), the compiler takes the nearest widening, and char widens to int before double.
Expecting a compile error: a missing exact match is not an error when widening the argument finds a version that fits.

Which version runs for f(5L), and why?
Why can two methods not differ only in their result type?

Back to questions Open topic in roadmap →Answer it yourself — Quiz