有了接口，就应该有实现，其具体的实现类如代码清单21-4所示。
代码清单21-4 分支的节点实现
public class Branch implements IBranch {
//存储子节点的信息
private ArrayList subordinateList = new ArrayList();
//树枝节点的名称
private String name="";
//树枝节点的职位
private String position = "";
//树枝节点的薪水
private int salary = 0;
//通过构造函数传递树枝节点的参数
public Branch(String name,String position,int salary){
this.name = name;
this.position = position;
this.salary = salary;
}
//增加一个子树枝节点
public void add(IBranch branch) {
this.subordinateList.add(branch);
}
//增加一个叶子节点
public void add(ILeaf leaf) {
this.subordinateList.add(leaf);
}
//获得自己树枝节点的信息
public String getInfo() {
String info = "";
info = "名称：" + this.name;
info = info + "\t职位："+ this.position;
info = info + "\t薪水："+this.salary;
return info;
}
//获得下级的信息
public ArrayList getSubordinateInfo() {
return this.subordinateList;
}
}
//存储子节点的信息
private ArrayList subordinateList = new ArrayList();
//树枝节点的名称
private String name="";
//树枝节点的职位
private String position = "";
//树枝节点的薪水
private int salary = 0;
//通过构造函数传递树枝节点的参数
public Branch(String name,String position,int salary){
this.name = name;
this.position = position;
this.salary = salary;
}
//增加一个子树枝节点
public void add(IBranch branch) {
this.subordinateList.add(branch);
}
//增加一个叶子节点
public void add(ILeaf leaf) {
this.subordinateList.add(leaf);
}
//获得自己树枝节点的信息
public String getInfo() {
String info = "";
info = "名称：" + this.name;
info = info + "\t职位："+ this.position;
info = info + "\t薪水："+this.salary;
return info;
}
//获得下级的信息
public ArrayList getSubordinateInfo() {
return this.subordinateList;
}
}
不管是总经理还是部门经理都是有子节点的存在，最终的子节点就是叶子节点，其接口如代码清单21-5所示。
代码清单21-5 叶子节点的接口
public interface ILeaf {
//获得自己的信息呀
public String getInfo();
}
//获得自己的信息呀
public String getInfo();
}
叶子节点的接口简单，实现也非常容易，如代码清单21-6所示。
代码清单21-6 叶子节点的实现
public class Leaf implements ILeaf {
//叶子叫什么名字
private String name = "";
//叶子的职位
private String position = "";
//叶子的薪水
private int salary=0;
//通过构造函数传递信息
public Leaf(String name,String position,int salary){
this.name = name;
this.position = position;
this.salary = salary;
}
//最小的小兵只能获得自己的信息了
public String getInfo() {
String info = "";
info = "名称：" + this.name;
info = info + "\t职位："+ this.position;
info = info + "\t薪水："+this.salary;
return info;
}
}
//叶子叫什么名字
private String name = "";
//叶子的职位
private String position = "";
//叶子的薪水
private int salary=0;
//通过构造函数传递信息
public Leaf(String name,String position,int salary){
this.name = name;
this.position = position;
this.salary = salary;
}
//最小的小兵只能获得自己的信息了
public String getInfo() {
String info = "";
info = "名称：" + this.name;
info = info + "\t职位："+ this.position;
info = info + "\t薪水："+this.salary;
return info;
}
}
