JAVA EXAMPLE PROGRAMS

JAVA EXAMPLE PROGRAMS

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Java 8 - forEach method example with List


forEach is a new method introduced in Java 8 to iterate over collections. Here is an example on forEach method to iterate over List.

package com.java2novice.java8;

import java.util.ArrayList;
import java.util.List;

public class ForEachListEx {

        public static void main(String a[]) {

                List<String> countryList = new ArrayList<>();
                countryList.add("India");
                countryList.add("USA");
                countryList.add("Japan");
                countryList.add("Canada");

                // iterate through List normal way
                ForEachListEx.iterateList(countryList);

                // iterate through List using forEach method
                ForEachListEx.iterateListUsingForEach(countryList);
        }

        public static void iterateList(List<String> countryList) {

                System.out.println("<-----Iterating in normal way----->");
                for(String country:countryList) {
                        System.out.println(country);
                }
        }

        public static void iterateListUsingForEach(List<String> countryList) {

                System.out.println("\n<---Iterating using forEach method--->");
                countryList.forEach(country->System.out.println(country));

                countryList.forEach(country->{
                        // you can implement some business logic here..
                });
        }
}

Output:
<-----Iterating in normal way----->
India
USA
Japan
Canada

<---Iterating using forEach method--->
India
USA
Japan
Canada
<< Previous Program 

Java 8 forEach method examples

  1. Java 8 forEach example with Map
  2. Java 8 forEach example with List
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In System.out, out is an instance of PrintStream. It is a static member variable in System class. This is called standard output stream, connected to console.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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