7.6 protected关键字

protected：对类用户来说，是private的，即无法访问；但对于任何继承于此类的导出类或其他任何位于同一包内的类来说，是可以访问的。

class Villain{
  private String name;
  protected void setName(String nm){
    name = nm;
  }
  Villain(String name){
    this.name = name;
  }
  @Override
  public String toString() {
    return "I'm a Villian and my name is "+name;
  }
}
public class Orc extends Villain{
  private int orcNumber;
  public Orc(String name,int orcNumber) {
    super(name);
    this.orcNumber = orcNumber;
  }
  //Orc功能具备增加、修改的权限
  public void change(String name,int orcNumber){
    setName(name);
    this.orcNumber = orcNumber;
  }
  @Override
  public String toString() {
    return "Orc{" +
        "orcNumber=" + orcNumber +'}' + super.toString();
  }
  public static void main(String[] args) {
    Orc orc = new Orc("Orc",12);
    System.out.println(orc);
    orc.change("change",11);
    System.out.println(orc);
  }
}
//=========其他包====================
/**
 * 仅仅有一个查看的权限
 */
public class OrcOther {
  public static void main(String[] args) {
    final Orc orc = new Orc("orc",88);
    System.out.println(orc);
  }
}