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- class ClassA {
- String whoAmI() {
- return "ClassA";
- }
- }
- class ClassB extends ClassA{
- String whoAmI() {
- return "ClassB";
- }
- }
- class Main {
- public static void main(String[] args) {
- ClassA obj1 = new ClassA();
- ClassA obj2 = new ClassB();
- System.out.println(obj1.whoAmI());
- System.out.println(obj2.whoAmI());
- }
- }
- ClassA
- ClassB
- class ClassA {
- String whoAmI() {
- return "ClassA";
- }
- }
- class Main {
- public static void main(String[] args) {
- Object obj1 = new ClassA();
- obj1.whoAmI();
- }
- }
- Exception in thread "main" java.lang.RuntimeException: Uncompilable source code - Erroneous sym type: java.lang.Object.whoAmI
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