有关hashmap的key,该怎么处理

有关hashmap的key

Java code

package StartDiaguo;import java.io.Serializable;//import java.util.*;public class Appointment implements Serializable {    private String clientName;        private String startTime;    private String endTime;    private String date;    private Appointment next;                    public Appointment(){        clientName = null;        date = null;        startTime = null;        endTime = null;        next = null;            }    public Appointment(String name,String d, String s, String e){        clientName = name;        date = d;        startTime = s;        endTime = e;        next = null;            }        public Appointment getNext(){        return next;    }    public void setNext(Appointment ap){        next = ap;    }        public String getName(){        return clientName;    }        public void setName(String name){        clientName = name;    }    public String getTime(){        return startTime +"-"+ endTime;    }        public void setTime(String s, String e){        startTime = s;        endTime = e;    }    public String getStartTime(){        return startTime;    }    public void setStartTime(String s){        startTime = s;    }    public void setEndTime(String e){        endTime = e;    }    public String getEndTime(){        return endTime;    }    public String getDate(){        return date;    }    public void setDate(String d){        date = d;    }    public void setAppointment(String n, String d, String s, String e) {        clientName = n;        startTime = s;        endTime = e;        date = d;    }}

private Map<String, Appointment> appBook; 来存一个Appointment
Appointment 是一个linkedlist的形式  
我用hashmap来存这个自定linkedlist类，当我想改Appointment.next 的内容后 怎么返回第一个app
还是有什么办法更改hashmap的key

[解决办法]
这是我提供的 管理约会的一个解决方案，一组有序列的约会抽象为AppSeries，那里面提供了对约会事件的基本增加和删除操作
对于你关注的一次约会序列当中 找一次约会的下一次约会，可以通过查找对应的index然后index+1再通过AppSeries调用提供的API实现，下面的TestApp有演示

Java code

import java.io.Serializable;//import java.util.*;public class Appointment implements Serializable {    private String clientName;    private String startTime;    private String endTime;    private String date;//    private Appointment next;    @Override    public String toString() {        return "Appointment{" +                "clientName='" + clientName + '\'' +                ", startTime='" + startTime + '\'' +                ", endTime='" + endTime + '\'' +                ", date='" + date + '\'' +                '}';    }    public Appointment(){        clientName = null;        date = null;        startTime = null;        endTime = null;//        next = null;    }    public Appointment(String name,String d, String s, String e){        clientName = name;        date = d;        startTime = s;        endTime = e;//        next = null;    }           public String getName(){        return clientName;    }    public void setName(String name){        clientName = name;    }    public String getTime(){        return startTime +"-"+ endTime;    }    public void setTime(String s, String e){        startTime = s;        endTime = e;    }    public String getStartTime(){        return startTime;    }    public void setStartTime(String s){        startTime = s;    }    public void setEndTime(String e){        endTime = e;    }    public String getEndTime(){        return endTime;    }    public String getDate(){        return date;    }    public void setDate(String d){        date = d;    }    public void setAppointment(String n, String d, String s, String e) {        clientName = n;        startTime = s;        endTime = e;        date = d;    }} 
 
[解决办法]
楼主问题表述不清 貌似这个应该发到j2se 

 

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