Lamda_Expression

 Lamda Expression

package test;

 

import java.util.ArrayList;

import java.util.Arrays;

import java.util.List;

import java.util.function.Consumer;

 

public class forEach {

 

       public static void main(String[] args) {

 

             List<String> alist = Arrays.asList("TX", "NY", "CA");// ArrayList

 

             // 1. for loop

             System.out.println("-------Using For Loop--------");

             for (int i = 0; i < alist.size(); i++) {

                    System.out.println(alist.get(i));

             }

 

             // 2. for loop another way

             System.out.println("-------Using For Loop with semicolon--------");

             for (String x : alist) {

                    System.out.println(x);

             }

 

             // 3. with anonymous class

             System.out.println("-------Anonymous class--------");

             alist.forEach(new Consumer<String>() {

 

                    @Override

                    public void accept(String str) {

                           System.out.println(str);

                           // System.out.println("The names is : " + str);

                    }

             });

 

             // 4. above block of code can also be written as below

             System.out.println("-------Delta expression--------");

             alist.forEach(str -> System.out.println(str));

 

             // 5. above blocks of code can also be written as below

             System.out.println("-------Method References--------");

             alist.forEach(System.out::println);

 

             // with number list

             List<Integer> blist = Arrays.asList(1, 5, 6, 3);// Integer Array List

             System.out.println("-------with integer arraylist--------");

             blist.forEach(x -> System.out.println(x));

             System.out.println("---------------------------");

             blist.forEach(System.out::println);

       }

}

Output:

-------Using For Loop--------

TX

NY

CA

-------Using For Loop with semicolon--------

TX

NY

CA

-------Anonymous class--------

TX

NY

CA

-------Delta expression--------

TX

NY

CA

-------Method References--------

TX

NY

CA

-------with integer arraylist--------

1

5

6

3

---------------------------

1

5

6

3