public class ConcreteClass{ String name;
String id;
int score;
public ConcreteClass(String name,String id,int score)
{
this.name=name;
this.id=id;
this.score=score;
}
public ConcreteClass(String name,String id)
{
this.name=name;
this.id=id;
}
public ...
public class ConcreteClass { // 成员变量 String name; String id; int score;// 接受三个参数的构造方法 public ConcreteClass(String _name, String _id, int _score) {name = _name;...