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 it. You could do this with your code:

A a = new A();
A b = new A(); // Wrong... x is already initialised

The correct ways to initialise x are:

public class A 
{    
    private static final int x = 5;
}

or

public class A 
{    
    private static final int x;

    static
    {
        x = 5;
    }
}