spot7.org logo
Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

Polymorphism and creation of Object using String


It should give compilation error:

Cannot reduce the visibility of the inherited method from One

Try to make method as public.

public class Two implements One{
    private int no;

    @Override
    public void setNo(int no){
        this.no = no;
    }
}

I don't know where are you created Three class, but I can help with your Two class.

public class Two implements One {
     private int no;

        @Override
        public void setNo(int no){
            this.no = no;
            System.out.println("No-->");
        }
        public static void main(String[] args) {
            One base;

            Class c;
            try {
                c =
Class.forName("com.test.stackoverflow.Two");
                base = (One) c.newInstance();
                base.setNo(5);
            } catch (ClassNotFoundException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (InstantiationException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            } catch (IllegalAccessException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }

        }
}

Categories : Java

Related to : Polymorphism and creation of Object using String
c# object behaviour with polymorphism
Your approach is not bad, although you should declare mergeA and mergeB functions as protected since they should not be exposed, but you would need some type check and casting before calling mergeA and mergeB. Another approach would be defining this in the base class (without overloading any of these functions): public abstract class Base { public int val {get;set;} public bool merge(Base

Categories : C#
Preventing object class creation
You missed this bit: by declaring at least one constructor That's what's preventing the default constructor from being created. The example given has a default access (package access) constructor: PackageOnly() { } ... so it satisfies both conditions: a) it declares at least one constructor; b) it declares no public constructors.

Categories : Java
Multi threaded access to map object that won't be modified after creation
Why don't you try an ImmutableMap? Once created cannot be modified so doesn't matter how many threads try to read in parallel.

Categories : Java
Inherit construction logic, but run Super constructor on Sub object creation
When you want subclassing, consider using function Constructor() { SuperConstructor.apply(this); /* ... */ } Constructor.prototype = Object.create(SuperConstructor.prototype); Object.defineProperty(Constructor.prototype, 'constructor', { value: Constructor, configurable: true, writable: true }); Calling SuperConstructor inside Constructor makes Constructor instances have pr

Categories : Javascript
Javascript creation of unique copy of given string text
Check this fiddle out. http://jsfiddle.net/sggndr6x/3/ The main part is like following (you need underscore.js) function do_it(input, final_arr){ var SUF = ' - Copy' // input text is first occurence in final_arr if(!_(final_arr).contains(input)){ return input } // input text is the second occurence in final_arr var copied = input + SUF if(!_(final_arr

Categories : Javascript
Recently Add
Redirecting the output directory of 'mvn package' or 'mvn compile' command
No suitable constructor found for ProductoExtranjero
java Composite design pattern(Directory &File)
Java JTree's ui refresh after removing node from parent
First REST Spring application
How to cancel Indexing of a Solr document using Update Request Processor
PowerMock - Mock a Singleton with a Private Constructor
Calling a Postgres stored function SQL error
Where to store Morphlines Java custom command class?
Generic repository using map
How can I scroll a ScrolledComposited in Eclipse SWT Design view?
2 Frames/layout in 1 Activity
Writing a switch differently
Next button opens another activity when its reaches the array limit
Is EclipseLink MOXy capable of applying JSR-303 Bean Validation when unmarshalling XML to object?
Why my jdk can't work,and before the java_home, there is a space that is not from me
How to add List of objects in a Map
How to make notepad++ function like regular notepad in cmd?
Cell renderer and the lost focus
how can I implement iterable for LinkedList>
Disable Androids image-crunch in eclipse (run as) builds
java 8 lambda myMap.stream().count() != myMap.size() after merging myMap
Issue with Calendar calculation that spans 2 calendar years
JSF 2.0 Spring bean injection
Java Regex ReplaceAll with grouping
Getting any word and last word using sed
Clicking on link on JEditorPane throws IOException
printing out difference of two arrays
Spring Bean Alias in JavaConfig
Using Factory Method to Create Generics
© Copyright 2017 spot7.org Publishing Limited. All rights reserved.