Discussion :: Declarations and Access Control - Finding the output (Q.No.10)
| Manjunath said: (Oct 12, 2011) | |
| Your explanation is not exactly correct...Correct reason is, 2 methods getLength() can have same name, argument & also return type. but return type should be compatable. here return type Long in sub class is not compatable with Integer of super class. so to compile change the 2 return types objects from super and sub. |
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| Datla Kranthi said: (May 5, 2014) | |
| class Super { public Integer getLength() { return new Integer(4); } } public class Sub extends Super { public Integer getLength() { return new Integer(5); } public static void main(String[] args) { Super sooper = new Super(); Sub sub = new Sub(); System.out.println( sooper.getLength().toString() + "," + sub.getLength().toString() ); } } Friends, if we keep Integer before getlength then we get result as 4,5. |
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| Pratik said: (Sep 6, 2015) | |
| Return type is does not matter in case of overriding. | |
| Farid said: (Feb 17, 2016) | |
| Answer [A]. Because overriding is not correct so when select getLength() it is select superclass method. |
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| Bhavyasree said: (Apr 6, 2016) | |
| After Java5 version if base class method return type is nonprimitive we can change the return of overridden method in subclass this is called Covariant return type in java. | |
| Krishna said: (Jun 1, 2017) | |
| Super is a reserved key word in java. How can we create a class by its name? | |
| Kkhushi said: (Jul 18, 2017) | |
| The super is reserved but not Super difference in capitals. | |
| Khagendra said: (Nov 27, 2017) | |
| @Krishna. Java is a case sensitive programming language. |
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| Khagendra said: (Nov 27, 2017) | |
| Overloading can't possible because it happens within a class, but overriding is happen in two different class in inheritance and here the two function name getLength () return different value. So, it is a contradiction of overriding concept, that's why the compile-time error occurs. | |
| Gopi said: (Dec 28, 2017) | |
| Is Integer valid return type. I have used the only int all the time. | |
| Nitin said: (Feb 29, 2020) | |
| Why its necessary to override super class method, can't we treat them different method and access it by class instance. | |
| Monika said: (Apr 27, 2021) | |
| @Nitin. It is possible. But in this case method name same. So overloading is also not possible. |
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| Nikhil said: (Jul 18, 2021) | |
| In java, method overloading is not possible by changing the return type of the method only because of ambiguity. | |
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