题目我以用Exception做了，不过总是出错，大家可不可以帮我看看！！
import java.io.*;
class openException extends Exception
{
};
class depositException extends Exception
{
};
class fetchException extends Exception
{
};
class Deposit
{
private float depositmoney;
public void openanaccount(float n)
{
if(n<1)
{
throw new openException();
}
else
{
depositmoney=n;
}
}
public void deposit(float m)
{
if(m<0)
{
throw new depositException();
}
else
{
depositmoney+=m;
}
}
public void fetch(float x)
{
if(x>depositmoney)
{
throw new fetchException();
}
else
{
depositmoney-=x;
}
}
public void quit()
{
System.out.println("welcome come in!");
}
};
class depositTest
{
public static void main(String[] args) //throws Exception
{
Deposit a=new Deposit();
String openstr,depositstr,fetchstr;
BufferedReader openbr=new BufferedReader(new InputStreamReader(System.in));
BufferedReader depositbr=new BufferedReader(new InputStreamReader(System.in));
BufferedReader fetchbr=new BufferedReader(new InputStreamReader(System.in));
try
{
System.out.print("input open an accout money:");
openstr=openbr.readLine();
float openmoney=Integer.parseInt(openstr);
a.openanaccount(openmoney);
System.out.print("input deposit:");
depositstr=depositbr.readLine();
float dep=Integer.parseInt(depositstr);
a.deposit(dep);
System.out.print("input fetch:");
fetchstr=fetchbr.readLine();
float fet=Integer.parseInt(fetchstr);
a.fetch(fet);
}
catch(openException e1)
{
System.out.println("open an account of money can not less 1 yuan!");
}
catch(depositException e2)
{
System.out.println("deposit can not less 0 yuan!");
}
catch(fetchException e3)
{
System.out.println("fetch more than deposit");
}
finally
{
a.quit();
}
}
};
编译时提示：
---------- javac -d . ----------
depositTest.java:21: unreported exception openException; must be caught or declared to be thrown
throw new openException();
^
depositTest.java:32: unreported exception depositException; must be caught or declared to be thrown
throw new depositException();
^
depositTest.java:43: unreported exception fetchException; must be caught or declared to be thrown
throw new fetchException();
^
3 errors
Normal Termination
Output completed (2 sec consumed).
