Sep 25

Static methods cannot access non-static member variables. An instance of the class is required to access its member variable and static methods are not associated with an instance (they are class methods). To fix it you have a few choices depending on your exact needs.


/**
*  Will not compile
*/

public class StaticReferenceToNonStatic
{
   protected int x;

   public static void myMethod()
   {
      // Cannot make a static reference
      // to the non-static field
      x = 6; 
   }
}

/**
* you can make your method non-static
*/

public class MyClass
{
   protected int x;

   public void myMethod()
   {
      x = 6;
   }
}

/**
*  you can provide an instance of the 
*  class to your static method for it 
*  to access member variables from
*/

public class MyClass
{
   protected int x;

   public static void myMethod(MyClass myClass)
   {
      myClass.x = 6;
   }
}

/**
*  you can make the member variable static
*/

public class MyClass
{
   protected static int x;

   public static void myMethod()
   {
      x = 6;
   }
} 

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