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}