これでどうよ？
public class Gen {
public static void main(String[] args) {
Gen.Super sub1 = new Gen.Sub1();;
Gen.Super sub2 = new Gen.Sub2();
write(sub1);
write(sub2);
}
public static <T extends Super> void write(T t){
System.out.println(t);
}
static class Super {
@Override
public String toString() {
return "superだよ";
}
}
static class Sub1 extends Super{
@Override
public String toString() {
return "sub1だよ";
}
}
static class Sub2 extends Super{
@Override
public String toString() {
return "sub2だよ";
}
}
}