Initialize a static map in Java with Examples

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:
  1. Creating a static map variable.
  2. Instantiating it in a static block.

  Below is the implementation of the above approach:

  
  

  
  
  

  // 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 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}