帮帮我
我是个新手
照抄书上然后改点了做了个小实验
public   class     CyberPet
{
private   boolean   isEating=true;
private   boolean   isSleeping=false;
private   String   name= "noname ";
private   String   food= "nothing ";

public   CyberPet(String   str)
        {
name=str;
}
public   void   setName(String   str)
{
name=str;
}
public   String   getName()
{
return   name;
}
public   void   eat()
{
isEating=true;
isSleeping=false;
return;
}
public   void   sleep()
{
isSleeping=true;
isEating=false;
return;
}
public   String   eat(String   str)
{
food=str;
}
public   void   setFood(String   str)
{
food=str;
}
public   String   getFood()
{
return   food;
}
public   String   getState()
{
if   (isEating)
return   "Eating ";
if   (isSleeping)
return   "Sleeping ";
return     "Error   in   State ";
}
}
提示:
CyberPet.java:33   missing   return   statement
帮帮我

------解决方案--------------------
public String eat(String str) {
food = str;
}
这个方法有问题，改成
public void eat(String str) {
food = str;
}
------解决方案--------------------
public String eat(String str)
{
food=str;
}


改为：
public void eat(String str)
{
food=str;
}