Initialize a static map in Java with Examples

Initialize a static map in Java with Examples

Last Updated : 27 Oct, 2021

In this article, a static map is created and initialized in Java. A static map is a map which is defined as static. It means that the map becomes a class member and can be easily used using class.

Method 1:

Creating a static map variable.
Instantiating it in a static block.

Below is the implementation of the above approach:

Java

// Java program to create a static map

import java.util.*;

class GFG {

    // Declaring the static map
    private static Map<Integer, String> map;

    // Instantiating the static map
    static
    {
        map = new HashMap<>();
        map.put(1, "GFG");
        map.put(2, "Geek");
        map.put(3, "GeeksForGeeks");
    }

    // Driver code
    public static void main(String[] args)
    {
        System.out.println(map);
    }
}

Output:

{1=GFG, 2=Geek, 3=GeeksForGeeks}

Method 2: Creating a static map variable and instantiating it together. Below is the implementation of the above approach:

Java

// Java program to create a static map

import java.util.*;

class GFG {

    // Declaring the static map
    private static Map<Integer, String> map
        = new HashMap<>() {
              map.put(1, "GFG");
              map.put(2, "Geek");
              map.put(3, "GeeksForGeeks");
          }

    // Driver code
    public static void main(String[] args)
    {
        System.out.println(map);
    }
}

Output:

{1=GFG, 2=Geek, 3=GeeksForGeeks}

Initialize a static map in Java with Examples

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