Initialize a static final field in the constructor

Question

public class A 
{    
    private static final int x;

    public A() 
    {
        x = 5;
    }
}

• final means the variable can

Answer 1

Think about what happens the second time you instantiate an object. It tries to set it AGAIN, which is expressly prohibited by being a static final. It can only be set one time for the entire class, not instance.

You should set the value when you declare it

private static final x=5;

If you need additional logic, or more complex instantiation, this can be done in a static initializer block.