toolong.java

import java.io.FileOutputStream;
import java.io.PrintStream;

class Bar {
    public static void Main() throws Exception {
        StringChecker.CheckFirstCharacter("Foobar");
    }

    static class StringChecker {
        public static void CheckFirstCharacter(String name) throws Exception {{
            if (name.startsWith("f")) {
                Runnable runnable = () -> {name.toLowerCase();};}
                throw new Exception("Cannot start with F");
            }
        }
    }
}