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How To Get Value From Map In Java

Last Updated : Mar 11, 2024

How To Get Value From Map In Java

In this article we will show you the solution of how to get value from map in java, it offers an green manner to retrieve values based totally on their corresponding keys.

Maps are broadly used in various applications and are specifically beneficial whilst coping with big quantities of information that require fast and listed get admission to.

Whether or not you are operating on a web application, a database management gadget, or any other Java task, knowledge the way to extract values from a Map is critical for manipulating and using the stored data effectively.

In this tutorial, we will discover numerous strategies and strategies to extract values from a Map in Java, empowering you to unencumber the entire ability of this essential data shape and streamline your programming duties.

To access values from a Map in Java, we are able to use the get() approach, which retrieves the price associated with a targeted key.

Moreover, we will make use of other strategies such as iteration and flow operations to extract values from a Map.

Step By Step Guide On How To Get Value From Map In Java :-

import java.util.HashMap;
import java.util.Map;
public class value {
    public static void main(String[] args) {
        // Create a map
        Map<String, Integer> ageMap = new HashMap<>();
        ageMap.put("Ram", 25);
        ageMap.put("Sham", 30);
        ageMap.put("Mini", 35);
        // Extract value using the get() method
        int RamsAge = ageMap.get("Ram");
        System.out.println("Ram’s age: " + RamsAge);
        // Extract values using iteration
        for (String name : ageMap.keySet()) {
            int age = ageMap.get(name);
            System.out.println(name + "'s age: " + age);
        // Extract values using stream operations
  1. We first import the desired instructions, along with `HashMap` and `Map`, which are part of the Java `util` package deal.
  2. We create a brand new instance of the `HashMap` magnificence named `ageMap` to keep call-age pairs. the key type is `String`, representing names, and the price type is `Integer`, representing a long time.
  3. We populate the `ageMap` with key-price pairs the use of the `positioned()` technique. In this situation, we add three entries: "Ram" with an age of 25, "Sham" with an age of 30, and "Mini" with an age of 35.
  4. To extract a specific fee from the `ageMap`, we use the `get()` approach and offer the corresponding key. In this example, we retrieve John's age by using passing the important thing "John" and assign it to the variable `johnsAge`.
  5. Next, we reveal the way to extract all values from the `ageMap` the use of iteration. We iterate over the keys of the `ageMap` the use of the `keySet()` technique, which returns a set of all keys inside the map. For each key, we retrieve the related price using the `get()` method and print it. This lets in us to output absolutely everyone's name and age.
  6. Finally, we utilize circulation operations to extract all values from the `ageMap` and print them the use of the `forEach()` method. We name the `values()` approach, which returns a set view of the values contained inside the map. using the move API, we iterate over the values and apply the `gadget.out.println()` method to print every value on a separate line.
  7. Via following those steps, you may effectively retrieve values from a Map in Java, whether it is a selected value based totally on a key or all the values contained in the map. this adaptability allows you to get right of entry to and control data stored in Maps, allowing you to create more dynamic and green Java applications.

Conclusion :-

We have explored one of a kind methods to retrieve values from a Map in Java.

We found out the way to use the `get()` method to extract a selected cost primarily based on a given key.

Moreover, we proven a way to iterate over the keys and retrieve the corresponding values using the `keySet()` and `get()` techniques.

We additionally showcased the usage of movement operations to extract all values from a Map.

With those strategies, you may correctly retrieve values from Maps and utilize them on your Java packages.

I hope this article on how to get value from map in java helps you and the steps and method mentioned above are easy to follow and implement.

Author Image About Amruta

Amruta is an Experienced web developer with 4 years for experience she completed her master's with MCA and passionate about programming Languages for creating technical contents like HTML, CSS, JavaScript, Java, Python, PHP, jQuery.

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