JuniorTheoryCommon

What happens when this program is compiled and run?

JAVA

public class Main {
    public static void main(String[] args) {
        int n = Integer.parseInt("12a");
        System.out.println(n);
    }
}

A NumberFormatException is thrown

Expecting 12: parseInt does not read the digits up to the letter and stop; the whole string must be an integer, or it throws NumberFormatException.
Expecting a compile error: the compiler does not check what a string literal says; parseInt checks the text at run time.

JuniorTheoryCommon

JAVA

public class Main {
    public static void main(String[] args) {
        int n = Integer.parseInt("12a");
        System.out.println(n);
    }
}

A NumberFormatException is thrown

Expecting 12: parseInt does not read the digits up to the letter and stop; the whole string must be an integer, or it throws NumberFormatException.
Expecting a compile error: the compiler does not check what a string literal says; parseInt checks the text at run time.