Static interface?

Question

I'm writing some classes that have only static methods. I would like to have them all implement an interface which has these methods, like so:public class AImpl implements A {
  public static void someMethod() {
    // do something
public interface A {
  static void someMethod();
}This isn't allowed. Is there anyway to do something similar? Or is it just not a possibility?
Thanks in advance,
m

Answer 1

This is one of the cases where the benefits of singleton over classes with static methods is vivid. you can turn your class with static methods into a singleton and take benefot of the interfaces you already defined. Here is some simple code to show it,
public interface A {
public void methodA();
//This is the class that had only static methods
public class Foo implements A{
private static Foo instance = new Foo();
private Foo() {}
public static Foo getInstance() {
return instance;
//previously it was a static method
public void methodA(){
usage:
rathern than calling
Foo.methodA()
you have to call
Foo.getInstance().mathodA()
you can use Foo.getIntance() anywhere where an A object is expected.
If it is still not clear, feel free to ask.