家庭作业不会……60分求解

[suxing1982]

两个class，分别叫Family和MyBackpacker，一个interface，叫Backpacker。
class MyBackpacker和interface Backpacker两者，与class Family之间的
关系均为uses。class MyBackpacker与interface Backpacker之间的关系是
inheritance。
两个class都是未完成，interface不能作改动。老师的要求是，完成class
Family,使其正常工作，另外完成class MyBackpacker，使其implements
interface Backpacker。我已经写完了class Family，但不知道对不对，
而class Mybackpacker，写了点，实在是写不下去了。
所有的代码如下，大侠们要有时间，就帮我改改、完成吧，先写了。
Code:
---------------------interface Backpacker-------------------------

/**
* This is a family backpacker accomodation.
*
* @author (Uncle Dave)
* @version (March 27, 2003)
*/

public interface Backpacker
{
//setters
String setMaxOccupants(int max); //set number of maximum occupants
// must be > 0 and < 100
// return "OK" or "ERROR"
//getters
int getMaxOccupants(); //get maximum number of occupants
int getNumOccupants(); //get number of current occupants

//other methods
String increaseNumOccupants (Family family); //Increase the number of occupants
//The backpacker must have sufficient capacity to
// add the enrire family
//This method updates the details of the current occupants
// if any error occurs, return "ERROR" or "OK"

String decreaseNumOccupants (Family family); //Decrease the number of occupants
//The entire family must be deleted for any change to occur
//This method updates the details of the current occupants
// if any error occurs, return "ERROR" or "OK"
}



----------------------------class Family--------------------------------

/**
* Room accomodation
*
* @author
* @version
*/
public class Family
{
private String lastName;
private int numPeople;

//null constructor
public Family()
{
lastName = "";
numPeople = 0;
}

//full constructor
public Family(String lastName, int numPeople)
{
setLastName(lastName);
setNumPeople(numPeople);
}

//setters

//length of lastName must be >0 and <10
//lastName must not contain a space
// return "OK" or "ERROR"
public String setLastName(String lastName)
{
int spaceLoc = lastName.indexOf(" ");
int len;
len = lastName.length();
if (( len <= 0 ) || ( len >= 10 ))
{
return "ERROR";
}
else
{
if ( spaceLoc == -1 )
{
return "ERROR";
}
else
{
return "OK";
}
}
}

//number of people must be >0 and <75
// return "OK" or "ERROR"
public String setNumPeople(int numPeople)
{
this.numPeople = numPeople;
if (( numPeople <= 0) || ( numPeople >= 75 ))
{
return "ERROR";
}
else
{
return "OK";
}
}

//getters
public String getLastName()
{
return lastName;
}

public int getNumPeople()
{
return numPeople;
}

}

-------------------------class MyBackpacker------------------------

/**
* must implement the Backpacker interface.
*
* @author (your name)
* @version (a version number or a date)
*/
public class MyBackpacker implements Backpacker
{


public MyBackpacker ()
{

}

public String setMaxOccupants (int max)
{
if (( max > 0 ) && ( max < 100 ))
{
return "OK";
}
else
{
return "ERROR";
}
}

public int getMaxOccupants()
{
return max;
}

public int getNumOccupants()
{
reurn numOccupants;
}



}

[suxing1982]

没有哪个大侠出来给点idea吗？

[suxing1982]

………………………………

[cowboy1114]

//---------------------interface Backpacker-------------------------

/**
* This is a family backpacker accomodation.
*
* @author (Uncle Dave)
* @version (March 27, 2003)
*/
import java.util.*;

public interface Backpacker
{
//setters
String setMaxOccupants(int max); //set number of maximum occupants
// must be > 0 and < 100
// return "OK" or "ERROR"
//getters
int getMaxOccupants(); //get maximum number of occupants
int getNumOccupants(); //get number of current occupants

//other methods
String increaseNumOccupants (Family family); //Increase the number of occupants
//The backpacker must have sufficient capacity to
// add the enrire family
//This method updates the details of the current occupants
// if any error occurs, return "ERROR" or "OK"

String decreaseNumOccupants (Family family); //Decrease the number of occupants
//The entire family must be deleted for any change to occur
//This method updates the details of the current occupants
// if any error occurs, return "ERROR" or "OK"
}



----------------------------class Family--------------------------------

/**
* Room accomodation
*
* @author
* @version
*/
class Family
{
private String lastName;
private int numPeople;

//null constructor
public Family()
{
lastName = "";
numPeople = 0;
}

//full constructor
public Family(String lastName, int numPeople)
{
setLastName(lastName);
setNumPeople(numPeople);
}

//setters

//length of lastName must be >0 and <10
//lastName must not contain a space
// return "OK" or "ERROR"
public String setLastName(String lastName)
{
int spaceLoc = lastName.indexOf(" ");
int len;
len = lastName.length();
if (( len <= 0 ) || ( len >= 10 ))
{
return "ERROR";
}
else
{
if ( spaceLoc == -1 )
{
return "ERROR";
}
else
{
return "OK";
}
}
}

//number of people must be >0 and <75
// return "OK" or "ERROR"
public String setNumPeople(int numPeople)
{
this.numPeople = numPeople;
if (( numPeople <= 0) || ( numPeople >= 75 ))
{
return "ERROR";
}
else
{
return "OK";
}
}

//getters
public String getLastName()
{
return lastName;
}

public int getNumPeople()
{
return numPeople;
}

//我添加了这个函数判断两个Family对象是否相等
//是不是只要判断lastName就可以了？
//不合要求的话可以自行修改
public boolean equals(Object o)
{
Family temp=(Family)o;
if(o.lastName.equals(lastName))
return true;
else
return false;
}

}

-------------------------class MyBackpacker------------------------

/**
* must implement the Backpacker interface.
*
* @author (your name)
* @version (a version number or a date)
*/
public class MyBackpacker implements Backpacker
{
//分配100个Family对象空间给familyCapactiy
private Family familyCapacity=new Family[100];

//familyCapactiy的上限，初始值为50
private int familyMaxCount=50;

//当前familyCapacity中的Family对象个数
private int familyCount=0;



public MyBackpacker ()
{

}

public String setMaxOccupants (int max)
{
if (( max > 0 ) && ( max < 100 ))
{
familyMaxCount=max;
return "OK";
}
else
{
return "ERROR";
}
}

public int getMaxOccupants()
{
return familyMaxCount;
}

public int getNumOccupants()
{
reurn familyCount;
}

String increaseNumOccupants(Family family)
{
if(familyCount<familyMaxCount)
{
familyCapacity[familyCount]=family;
familyCount++;
return "OK";
}
else
{
return "ERROR";
}


}

String decreaseNumOccupants (Family family)
{
Iterator itr=familyCapacity.iterator();
String modified="ERROR";
while(itr.hasNext())
{
Family temp=(Family)ite.next();
if(temp.equals(family))
{
modified="OK";
itr.remove()
}
}

return modified;

}



}

[cowboy1114]

不明白还可以发短消息给我

[wuhandong125]

不好意思 我不会 来给你捧个场吧