JavaBean:
public class TExample <T,S extends T> {
private T t;
private S s;
public T getT() {
return t;
}
public void setT(T t) {
this.t = t;
}
public S getS() {
return s;
}
public void setS(S s) {
this.s = s;
}
public String toString(){
return s.toString()+t.toString();
}
}
泛型类S必须继承自T