public class zazhi extends Book{
private String zazhi;
zazhi zz=new zazhi();
public String getZazhi() {
return zazhi;
}
public void setZazhi(String zazhi) {
this.zazhi = zazhi;
}
public zazhi(){
}
public zazhi(String bianhao){
super getBianhao;
}
}
super.getBianhao();