Difference between revisions of "Kava Lambda Expressions"

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Reference - https://www.freecodecamp.org/news/learn-these-4-things-and-working-with-lambda-expressions-b0ab36e0fffc/<br>
 
Functional Interface<br>
 
Functional Interface<br>
 
<source lang="java">
 
<source lang="java">

Latest revision as of 21:00, 10 April 2020

Reference - https://www.freecodecamp.org/news/learn-these-4-things-and-working-with-lambda-expressions-b0ab36e0fffc/
Functional Interface

interface MyName{
  String computeName(String str);
}

Example1 - Numeric Test

interface NumericTest {
	boolean computeTest(int n); 
}
 
public static void main(String args[]) {
	NumericTest isEven = (n) -> (n % 2) == 0;
	NumericTest isNegative = (n) -> (n < 0);
 
	// Output: false
	System.out.println(isEven.computeTest(5));
 
	// Output: true
	System.out.println(isNegative.computeTest(-5));
}

Example2 - Greeting Lambda

interface MyGreeting {
	String processName(String str);
}
 
public static void main(String args[]) {
	MyGreeting morningGreeting = (str) -> "Good Morning " + str + "!";
	MyGreeting eveningGreeting = (str) -> "Good Evening " + str + "!";
 
  	// Output: Good Morning Luis! 
	System.out.println(morningGreeting.processName("Luis"));
 
	// Output: Good Evening Jessica!
	System.out.println(eveningGreeting.processName("Jessica"));	
}