Lambda Expression
As we have seen in our last article Functional interface is introduced in Java 8 to support Lambda expression.
today we will understand lambda expression : Lambda expression implement Functional Interfaces , it save lot of code.
Check Example : WITHOUT LAMBDA EXPRESSION :
below is same example , but using lambda expression ,in this lot of code is saved as below
Lambda expression is nothing but method without name , access modifier and return type , it contain 3 main parts :
1.Parenthesis ( ) for method arguments , it can be non-empty or empty as per requirement.
2.Arrow Symbol -> indicates lambda expression (to link method parameters or parenthesis with body).
3.Body (use curly braces for multiple lines , or if only one statement is there then curly braces are optional)
Syntax :
1.Syntax without method arguments : () -> { }
1.Syntax with arguments : (a1,a2) -> { }
Example :check one more example to understand lambda expression :
Java Lambda Expression : Filter Collection Data
