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Java LinkedHashMap forEach() Method with Example

LinkedHashMap Class forEach() method: Here, we are going to learn about the forEach() method of LinkedHashMap Class with its syntax and example.
Submitted by Preeti Jain, on March 09, 2020

LinkedHashMap Class forEach() method

• forEach() method is available in java.util package.
• forEach() method is used to perform the specified action for every entry (key-value) pairs in the LinkedHashMap till all the entries have been executed.
• forEach() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• forEach() method does not throw an exception at the time of acting.

Syntax:

    public void forEach(BiConsumer actions);

Parameter(s):

• BiConsumer actions – represents the action to be performed.

Return value:

The return type of the method is void, it returns nothing.

Example:

// Java program to demonstrate the example 
// of void forEach(BiConsumer actions)  method 
// of LinkedHashMap 

import java.util.*;

public class ForEachOfLinkedHashMap {
    public static void main(String[] args) {
        // Instantiates a LinkedHashMap object
        Map < Integer, String > map = new LinkedHashMap < Integer, String > () {};

        // By using put() method is to add
        // key-value pairs in a LinkedHashMap
        map.put(10, "C");
        map.put(20, "C++");
        map.put(50, "JAVA");
        map.put(40, "PHP");
        map.put(30, "SFDC");

        // Display LinkedHashMap
        System.out.println("LinkedHashMap: " + map);

        // By using forEach() method is to
        // iterate the objects exists
        // in this LinkedHashMap
        map.entrySet().stream().forEach((bi) -> {
            System.out.println(bi.getKey() + " " + bi.getValue());
        });
    }
}

Output

LinkedHashMap: {10=C, 20=C++, 50=JAVA, 40=PHP, 30=SFDC}
10 C
20 C++
50 JAVA
40 PHP
30 SFDC