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 … Read more…

Lambda Expressions with One Parameter

Java-Lambda Expressions with One Parameter

Lambda Expressions with One Parameter When a lambda expression has only one parameter, it is not necessary to surround the parameter name with parentheses when it is specified on the left side of the lambda operator. For example, in the following program, ‘i->i*i’ is also a valid way to write the lambda expression. Program Program … Read more…

Lambda Expressions with Parameters

Java-Lambda Expressions with Parameters

Lambda Expressions with Parameters Following program shows the use of a parameter with a lambda expression. The two parameters, n and v, are specified in the parameter list, separated by commas(first line in the main()). This example can be generalized. Whenever more than one parameter is required, the parameters are specified, separated by commas, in a parenthesized … Read more…

Lambda-Expression

Java-Lambda Expressions

Lambda Expressions Key to understanding Java’s implementation of lambda expressions are two constructs. The first is the lambda expression, itself. The second is the functional interface. A lambda expression is, essentially, an anonymous (that is, unnamed) method. However, this method is not executed on its own. Instead, it is used to implement a method defined … Read more…