How can I use a class like this?

Question

public class Test<N, T extends Test<N, T>> {
public static void main(String[] args) {
Test<String, Test<String, Test>> test = null; //compile failed...
}

Answer 1

I could suggest the following example:public class Test<N, T extends Test<N, T>> {
    public void op(T t){
        System.out.println("T: " + t.getClass().getName());
    public static void main(String[] args) {
        SubTest<String> subTest = new SubTest<String>();
        subTest.op(subTest);
class SubTest<N> extends Test<N, SubTest<N>>{   
}The problem is that T parameter should be a descendant of Test class