Java program uses Lambda expression to traverse ArrayList

Java Examples Comprehensive

In this example, we will learn how to traverse each element of an ArrayList using lambda expressions in Java.

To understand this example, you should understand the followingJava programmingTopic:

• Java ArrayList class

• Java Lambda Expressions

Example: Passing ArrayList as a function parameter

import java.util.ArrayList;
class Main {
　　public static void main(String[] args) {
　　　　//Create an ArrayList
　　　　ArrayList<String> languages = new ArrayList<>();
　　　　//Add elements to the ArrayList
　　　　languages.add("Java");
　　　　languages.add("Python");
　　　　languages.add("JavaScript");
　　　　//Print the array list
　　　　System.out.print("ArrayList: ");
　　　　//traverse each element of the array list
　　　　//Using the forEach() method
　　　　languages.forEach((e　-> {
　　　　　　System.out.print(e　+　"	,");
　　　　});
　　}
}

Output Result

ArrayList: Java, Python, JavaScript,

In the above example, we created an array list named languages. Note the code,

languages.forEach((e　-> {
　　System.out.print(e　+　"	,");
});

In this example, we pass a lambda expression as a parameter toArrayList forEach().

Java Examples Comprehensive