Javada Class Yapıları

package poly;

class Employee{
    public void func() {
        System.out.println("Bu empden");
    }
}

class Manager extends Employee{
    public void func() {
        System.out.println("Bu mngden");
    }
}

public class Main {
    public static void main(String[] args) {
        Employee emp1 = new Employee();
        emp1.func();

        Employee emp2 = new Manager();
        emp2.func();

        Manager mng = new Manager();
        mng.func();

        Manager mng1 = new Employee();
        mng1.func();

/* SONUCLAR:
    run:
    Bu empden
    Bu mngden
    Bu mngden
    Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - incompatible types
      required: poly.Manager
      found:    poly.Employee
            at poly.Main.main(Main.java:28)
    Java Result: 1
    BUILD SUCCESSFUL (total time: 3 seconds)
*/
    }
}