Constructor References

Java-Constructor References

Constructor References It is also possible to create references to constructors. This is the general form of the syntax that you will use : className::new. This reference can be assigned to any functional interface reference that defines a method compatible with the constructor. For example, in the following program, the MyMethod( ) method of MyInterface returns a reference of … Read more…

Method References to Generics

Java-Method References to Generics

Method References to Generics You can use method references with generic classes and/or generic methods. For example, in the following program, MyClass is a non-generic class that contains a static generic method called showData( ). This method print the elements in an specified array. Notice how the generic type argument is specified. For example, its first call … Read more…

Variable Capture

Java-Variable Capture

Variable Capture A lambda expression can use an instance or static variable defined by its enclosing class. A lambda expression also has access to this keyword, which refers to the invoking instance of the lambda expression’s enclosing class. Thus, a lambda expression can obtain or set the value of an instance or static variable and call … Read more…

Instance Method References with Class Name

Java-Instance Method References with Class Name

Instance Method References with Class Name It is also possible to handle a situation in which you want to specify an instance method that can be used with any object of a given class, not just a specified object. In this case, you will create a method reference as ClassName::instanceMethodName. The name of the class is … Read more…

Method References to Instance Methods

Java-Method References to Instance Methods

Method References to Instance Methods To pass a reference to an instance method on a specific object, use the syntax: objRefName::methodName. This syntax is similar to that used for a static method, except that an object reference is used instead of a class name. The following program demonstrates a static method reference. In the program, notice that … Read more…

Method-References

Java-Method References

Method References A method reference provides a way to refer to a method without executing it. It relates to lambda expressions because it, too, requires a target type context that consists of a compatible functional interface. When evaluated, a method reference also creates an instance of the functional interface. There are different types of method references, Method … Read more…