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 to Instance Methods

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…

Lambda Expressions as Arguments

Java-Lambda Expressions as Arguments

Lambda Expressions as Arguments A lambda expression can be used in any context that provides a target type. One of these is when a lambda expression is passed as an argument. In fact, passing a lambda expression as an argument is a common use of lambdas. Moreover, it is a very powerful use because it gives … Read more…

Generic Functional Interfaces

Java-Generic Functional Interfaces

Generic Functional Interfaces It is possible to declare generic functional interfaces. To understand the value of generic functional interfaces, consider the two different functional interfaces, one called StringYear and the other called IntYear : Both interface defined a method called getYear( ) that returned a result. In the first case, the return type was String. In the second case, the return … Read more…

Lambda Block

Java-Lambda Block

Lambda Block The body of the lambda shown in the following example consist of a single expression. These types of lambda bodies are referred to as expression bodies, and lambdas that have expression bodies are sometimes called expression lambdas. In an expression body, the code on the right side of the lambda operator must consist of a … Read more…