Lambdas in Java(1.8) - 2 - Lambda Passed as method argument Example

LambdaInterface 

(or) 

Lambda Expression as Method Argument

public class PassingLambdaAsMethodArgument {

void printGreeting(GreetingLambdaInterface greetingLambdaInterface){
System.out.println(greetingLambdaInterface.printGreetingStrLength("hallo") );//print the length of string "hallo"
}

public static void main(String[] args) {
PassingLambdaAsMethodArgument plafp = new PassingLambdaAsMethodArgument();

//Pass lambda Interface object as method argument
GreetingLambdaInterface gli = s->s.length();
plafp.printGreeting( gli );

//(OR) 

               //pass the lambda expression as method argument
plafp.printGreeting(s->s.length());
}
}

interface GreetingLambdaInterface {
int printGreetingStrLength(String s);
}