static blank final variable

static blank final variable

A static final variable that is not initialized at the time of declaration is known as static blank final variable. It can be initialized only in static block.

/**

 * static blank final variable must be initialized in static block.

 * Otherwise there will compile time error.

 */

public class Solution {

      //static blank final variable

      static final int staticFinal;

      public Solution() {

          // The final field Solution.staticFinal cannot be assigned

          // staticFinal=50;

      }

      static {

          staticFinal=50;

      } 

      public static void main(String args[]){ 

          System.out.println("static final blank:"

                            +Solution.staticFinal); 

      }

}

Output: static final blank:50

If you will assign in the constructor, there will be error “The final field staticFinal cannot be assigned” at compile time.