forEach

Java provides a new method forEach() to iterate the elements. It is defined in the Iterable and Stream interface. It is a default method defined in the Iterable interface. Collection classes which extend Iterable interface can use the forEach loop to iterate elements

This method takes a single parameter which is a functional interface. So, you can pass a lambda expression as an argument.

forEach() Signature in Iterable Interface 

default void forEach(Consumeraction) 


import java.util.ArrayList;  
import java.util.List;  
  
public class Example1 {  
    public static void main(String[] args) {  
        List gamesList = new ArrayList();  
        gamesList.add("Football");  
        gamesList.add("Cricket");  
        gamesList.add("Chess");  
        gamesList.add("Hocky");  
        System.out.println("Iterating by passing lambda expression");  
        gamesList.forEach(games -> System.out.println(games));  
          
    }  
}  
  output
  
Iterating by passing lambda expression
Football
Cricket
Chess
Hocky

Example2 

import java.util.ArrayList;  
import java.util.List;
  
public class Example2 {  
    public static void main(String[] args) {  
        List gamesList = new ArrayList();  
        gamesList.add("Football");  
        gamesList.add("Cricket");  
        gamesList.add("Chess");  
        gamesList.add("Hocky");  
        System.out.println("Iterating by passing method reference");  
        gamesList.forEach(System.out::println);  
    }  
}  

Iterating by passing method reference
Football
Cricket
Chess
Hocky

Java Stream forEachOrdered() Method Along with forEach() method, Java provides one more method forEachOrdered(). It is used to iterate elements in the order specified by the stream. Signature: 

void forEachOrdered(Consumer action) 
import java.util.ArrayList;  
import java.util.List;  
public class ForEachOrderedExample {  
    public static void main(String[] args) {  
        List gamesList = new ArrayList();  
        gamesList.add("Football");  
        gamesList.add("Cricket");  
        gamesList.add("Chess");  
        gamesList.add("Hocky");  
        System.out.println("------------Iterating by passing lambda expression---------------");  
        gamesList.stream().forEachOrdered(games -> System.out.println(games));  
        System.out.println("------------Iterating by passing method reference---------------");  
        gamesList.stream().forEachOrdered(System.out::println);  
    }  
  
}  
 
output:
Football
Cricket
Chess
Hocky
Iterating by passing method reference
Football
Cricket
Chess
Hocky