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
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
food = str;
}
这个方法有问题,改成
public void eat(String str) {
food = str;
}
{
food=str;
}
改为:
public void eat(String str)
{
food=str;
}
public void sleep()
{
isSleeping=true;
isEating=false;
return;
}改为:
public void sleep()
{
isSleeping=true;
isEating=false;
}
可能是我理解错误了.....
带一个String参数的新eat()
我就改了变成了 String 的返回的了.....