java does not support multiple inheritances through classes but through the interfaces, we can use multiple inheritances . No java doesn't support multiple inheritance directly because it leads to overriding of methods when both extended class have a same method name.Accordingly, is multiple inheritance possible in Java using interface?
Q) Multiple inheritance is not supported through class in java, but it is possible by an interface, why? As we have explained in the inheritance chapter, multiple inheritance is not supported in the case of class because of ambiguity. However, it is supported in case of an interface because there is no ambiguity.
Furthermore, what is multiple inheritance in Java with examples? When one class extends more than one classes then this is called multiple inheritance. For example: Class C extends class A and B then this type of inheritance is known as multiple inheritance. Java doesn't allow multiple inheritance.
In this way, why in Java Multiple inheritance is not possible?
Java supports multiple inheritance through interfaces only. A class can implement any number of interfaces but can extend only one class. Multiple inheritance is not supported because it leads to deadly diamond problem. An interface is a contract of things your class has to implement.
Which type of multiple inheritance does Java support?
The Java programming language supports multiple inheritance of type, which is the ability of a class to implement more than one interface. An object can have multiple types: the type of its own class and the types of all the interfaces that the class implements.
Why do we need interface?
interface allows a class to behave like multiple types, which is not possible without multiple inheritance of class. It also ensures that you follow programming to interface than implementation pattern, which eventually adds lot of flexibility in your system.What is the use of interface?
Why do we use interface ? It is used to achieve total abstraction. Since java does not support multiple inheritance in case of class, but by using interface it can achieve multiple inheritance . It is also used to achieve loose coupling.What is multiple interface?
Extending Multiple Interfaces A Java class can only extend one parent class. Multiple inheritance is not allowed. Interfaces are not classes, however, and an interface can extend more than one parent interface. The extends keyword is used once, and the parent interfaces are declared in a comma-separated list.What is an interface?
In computing, an interface is a shared boundary across which two or more separate components of a computer system exchange information. The exchange can be between software, computer hardware, peripheral devices, humans, and combinations of these.What are abstract methods?
An abstract method is a method that is declared, but contains no implementation. Abstract classes may not be instantiated, and require subclasses to provide implementations for the abstract methods. Let's look at an example of an abstract class, and an abstract method.Can we extend 2 classes in Java?
Java does not support multiple inheritance, that's why you can't extend a class from two different classes at the same time. Rather, use a single class to extend from, and use interfaces to include additional functionality.What is an interface in OOP?
Interfaces in Object Oriented Programming Languages. An interface is a programming structure/syntax that allows the computer to enforce certain properties on an object (class). For example, say we have a car class and a scooter class and a truck class.Can we create object of interface?
NO we cant create an object of an Interface ,we use an Interface to hide the implementations from user. Interface contains only abstract methods and as abstract methods do not have a body (of implementation code) we can not create an object without constructor also .Why pointers are not used in Java?
The very first reason for this is Pointers cannot be used in Java because pointers don't exist in Java . Yes pointer is a reference operator as it is for the address storage. The only real use for pointers is direct memory manipulation. One of the key feature of java is security, since pointers don't ensure security.Can you use this () and super () both in a constructor?
Both this() and super() are constructor calls. Constructor call must always be the first statement. So we can not have two statements as first statement, hence either we can call super() or we can call this() from the constructor, but not both.What is Polymorphism in Java?
Polymorphism in Java is a concept by which we can perform a single action in different ways. We can perform polymorphism in java by method overloading and method overriding. If you overload a static method in Java, it is the example of compile time polymorphism. Here, we will focus on runtime polymorphism in java.What is ambiguity in Java?
The ambiguities are those issues that are not defined clearly in the Java language specification. The different results produced by different compilers on several example programs support our observations. KEY WORDS: Java; language design; language. definition; object-oriented programming; 1.Can we override static method?
Answer is, No, you can not override static method in Java, though you can declare method with same signature in sub class. It won't be overridden in exact sense, instead that is called method hiding. As per Java coding convention, static methods should be accessed by class name rather than object.What is static in Java?
In Java, a static member is a member of a class that isn't associated with an instance of a class. Instead, the member belongs to the class itself. As a result, you can access the static member without first creating a class instance. The value of a static field is the same across all instances of the class.What is diamond problem in Java?
The “diamond problem” is an ambiguity that can arise as a consequence of allowing multiple inheritance. It is a serious problem for languages (like C++) that allow for multiple inheritance of state. In Java, however, multiple inheritance is not allowed for classes, only for interfaces, and these do not contain state.What is string in Java?
String is a sequence of characters, for e.g. “Hello” is a string of 5 characters. In java, string is an immutable object which means it is constant and can cannot be changed once it has been created.Is it possible to override the main method?
Well, you can call it just like any other method. In short, main method can be overloaded but cannot be overridden in Java. That's all about overloading and overriding main method in Java. Now you know that its possible to overload main in Java but its not possible to override it, simply because its a static method. 
