Cannot instantiate the type Foo

From JavaErrors

One way to get the error

 Cannot instantiate the type Foo

is if you are trying to instantiate an abstract class.

WRONG

 public abstract class Foo {
   public Foo() {
     // stuff
   }
 }
 public class Main {
   public static void main {
     Foo aFoo = new Foo();         // Foo is abstract; you can't instantiate it
     // stuff 
   }
 }

RIGHT

 public abstract class Foo {
   public Foo() {
     // stuff
   }
 }
 public class FooSubclass extends Foo {
   public FooSubclass() {
     // stuff
   }
 }
 public class Main {
   public static void main {
     FooSubclass aFoo = new FooSubclass();       // you need some subclass
     // stuff 
   }
 }