tag:blogger.com,1999:blog-8712770457197348465.post8605765245520687036..comments2024-03-17T23:01:26.872-07:00Comments on Javarevisited: Why multiple inheritances are not supported in Javajavin paulhttp://www.blogger.com/profile/15028902221295732276noreply@blogger.comBlogger28125tag:blogger.com,1999:blog-8712770457197348465.post-73861944791434972982022-07-13T03:53:37.574-07:002022-07-13T03:53:37.574-07:00Nice explanation Nice explanation Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-42094814976825162592019-08-16T21:45:13.241-07:002019-08-16T21:45:13.241-07:00"With the default method feature in java 8, o..."With the default method feature in java 8, one can provide the concrete implementation in interface itself. So i don't think so this question is valid anymore."<br /><br />Well... that is technically false. The default method defined in an interface is used ONLY if no other implementation is provided. In case a method with the same signature of the default one is provided, this &Giuseppe Ficarahttps://www.blogger.com/profile/07647162662973526280noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-62742498343040705732018-09-24T23:00:26.393-07:002018-09-24T23:00:26.393-07:00Obviously yaar..both r same questionObviously yaar..both r same questionAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-55170402899619886892017-12-09T11:06:43.845-08:002017-12-09T11:06:43.845-08:00Hi Javin,
With the default method feature in java...Hi Javin,<br /><br />With the default method feature in java 8, one can provide the concrete implementation in interface itself. So i don't think so this question is valid anymore.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-84814550310497524302017-07-06T05:20:22.094-07:002017-07-06T05:20:22.094-07:00Hello Arpit, I know your blog, you are doing good ...Hello Arpit, I know your blog, you are doing good job, keep it up, nice to see you here :-)javin paulhttps://www.blogger.com/profile/15028902221295732276noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-57324836909667721962017-07-06T03:38:11.640-07:002017-07-06T03:38:11.640-07:00Thanks for sharing such useful information on why ...Thanks for sharing such useful information on why Multiple Inheritance is not supported by Java. It is one of the frequently asked question s in interviews. You gave correct answer to this question. I agree with your answer that Multiple Inheritance creates ambiguity around Diamond problem. But in Java, We can achieve Multiple Inheritance through the Interface. I have a blog (Java2Blog) which Arpit Mandliyahttp://www.java2blog.com/noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-82795905393269746042017-04-18T01:38:52.672-07:002017-04-18T01:38:52.672-07:00Marker interface doesn't have any method it...Marker interface doesn't have any method it's achieve only by implementing the interface.its provide speciality to the class. for eg.serializable is marker interface when we implement this interface the state of object is converted into file means in byte code so we can send over the network.its provide security.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-17104547599870929242017-03-12T10:48:41.238-07:002017-03-12T10:48:41.238-07:00In interface code,
Which interface method is goin...In interface code, <br />Which interface method is going to be override. Anonymoushttps://www.blogger.com/profile/10438078870147360740noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-66644141221405988112015-12-04T10:04:40.595-08:002015-12-04T10:04:40.595-08:00can anyone tell me what is the use of marker inter...can anyone tell me what is the use of marker interface if it doesn't have any method??Anonymoushttps://www.blogger.com/profile/13976433484109208767noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-83981158789157247142015-06-12T23:13:39.148-07:002015-06-12T23:13:39.148-07:00please tell me deference b/w extends and implement...please tell me deference b/w extends and implements in javaAnonymoushttps://www.blogger.com/profile/06433227374659092011noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-90971417852278445352014-09-03T19:40:34.300-07:002014-09-03T19:40:34.300-07:00Precisely, Java does support multiple inheritance,...Precisely, Java does support multiple inheritance, what is not supported is "multiple inheritance of state", which is bad and it's great Java doesn't go to that part. Multiple inheritance of Type is supported from start using interfaces, which means your interface can extend more than one interface and thus become polymorphically more powerful. From Java 8 onwards, Java has alsoAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-39962712116060617022014-07-09T23:36:18.564-07:002014-07-09T23:36:18.564-07:00When you try to implement 2 interfaces and if both...When you try to implement 2 interfaces and if both have same methods we implement them using explicit implementation like Disposable1.dispose(){ implementation goes here } then why cant we do the same with classes. Why cant we just call the particular method using Class. I am not saying to use dot operator because it is used for Static methods. Why cant we use a colon something like this<br /><brAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-84008193692875530082014-05-18T10:31:37.237-07:002014-05-18T10:31:37.237-07:00final Class
Cannot be extended. This is used for ...final Class <br />Cannot be extended. This is used for security and to ensure the design of a fundamental class cannot be altered<br /><br />final method<br />Cannot be overriden in a subclass<br /><br />final var<br />Cannot be changed once assigned. <br />To enforce an immutable referenceAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-10781129988651199672014-05-18T10:25:49.443-07:002014-05-18T10:25:49.443-07:00Because somewhere within your mail method you have...Because somewhere within your mail method you have a call to a method that may throw a checked exception. Java says that when a checked exception may be thrown from within a method call the client(caller) must be made aware of this via the throws keyword on the method signature.<br /><br />This gives the client 2 options<br />1 handle the exception by catching it and dealing with it or<br /><br /Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-64183103271357099712014-04-04T19:24:27.556-07:002014-04-04T19:24:27.556-07:00Why we use final keyword in java?Why we use final keyword in java?Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-90236898325924147112014-03-27T10:24:04.655-07:002014-03-27T10:24:04.655-07:00HI Guys can you give me the solution ??
Public sta...HI Guys can you give me the solution ??<br />Public static void mail(string args[])throws Exception................why we are using throws ExceptionAnonymoushttps://www.blogger.com/profile/11584504390134766480noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-62952571629500372752014-02-04T08:21:57.889-08:002014-02-04T08:21:57.889-08:00This is true that the diamond problem comes into p...This is true that the diamond problem comes into play when the multiple inheritance is supported but there's a way around to assign a precedence. For example, in case of a conflict class A will have precedence over class B. But, the efforts required to implement this doesn't justify with the benefits will be achieved through multiple inheritance.<br /><br />Take an example of source Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-68608764751517309922014-01-15T22:07:48.270-08:002014-01-15T22:07:48.270-08:00multiple inheritance is not supported in java for ...multiple inheritance is not supported in java for classes and also for interfaces because the jvm can create only one object at a time.we cannot say that multiple inheritance is supported for interfaces by simply extending more than one interface at a time, forget about the multiple inheritance,that is not even inheritance because inheritance means using the properties of one class into another toufeeq khanhttps://www.blogger.com/profile/07750706654949931977noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-43691959970352855832014-01-09T02:14:03.383-08:002014-01-09T02:14:03.383-08:00Multiple Inheritance for classes is not supported ...Multiple Inheritance for classes is not supported in Java, but it does support multiple inheritance for interfaces. Main reason for not allowing multiple inheritance for classes is Deadly diamond of Death pattern( also known as DDD). As shown above, if class D class a method defined in both B and C, there is no way to identify which one to call, until a fully qualified name is used. Interface Gopalnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-66934663392888792102012-12-18T02:56:17.074-08:002012-12-18T02:56:17.074-08:00Awesome post, thanks! your post combined with thi...Awesome post, thanks! your post combined with this post:<br /><br />www.programmerinterview.com/index.php/java-questions/multiple-inheritance/<br /><br />really helped my understanding of multiple inheritanceAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-76056552983772413252012-12-05T01:53:02.488-08:002012-12-05T01:53:02.488-08:00While both of above reasons are correct to a certa...While both of above reasons are correct to a certain extent, the primary reason is that with inheritance, the inherited class is loaded in the memory each time it's child class object is created. If a class inherited multiple other classes, the memory and load time overhead would get out of control. Which certainly happens in poorly designed C++ applications<br /><br />An interface Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-3951060818892875602012-11-30T10:09:34.120-08:002012-11-30T10:09:34.120-08:00is the definition of the multiple inheritance here...is the definition of the multiple inheritance here enoughhimayat zehgeerhttps://www.blogger.com/profile/06300399273168345236noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-23026398704631493222012-11-19T01:23:16.892-08:002012-11-19T01:23:16.892-08:00Hi Dude as i Know Multiple Inheritence is not supp...Hi Dude as i Know Multiple Inheritence is not supported in java just because of the Violation of super() keyword.<br />When Ever you called the method/constructor of super class at that time JVm got confused,it cant decide which method you are calling.its something similar to Diamond problem.<br /><br />And if you need any more help please ask me at <br />ziaur18@gmail.com.<br /><br />Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-3872423852984051532012-09-17T11:44:30.208-07:002012-09-17T11:44:30.208-07:00This interview question is absolutely worthless in...This interview question is absolutely worthless in determining if someone is a good java programmer. It is nothing more than trivia.Michaelhttps://www.blogger.com/profile/04222042011928938178noreply@blogger.comtag:blogger.com,1999:blog-8712770457197348465.post-19639822519535622962011-11-21T02:54:18.438-08:002011-11-21T02:54:18.438-08:00Re: multiple inheritance Vs interface?
The fo...Re: multiple inheritance Vs interface?<br /><br /> The following are the examples<br /> First one uses the classes and the second one uses Interfaces<br /> /***********************Using Classes*************/<br /> class A<br /> {<br /> public void methodAClassA()<br /> {<br /> System.out.println("In ClassA MethodA");<br /> }<br /> }<br /> class B extendsmarutihttps://www.blogger.com/profile/02129098494946414888noreply@blogger.com