Error:unreported exception java.io.IOexception; must be caught or declared to be thro

[misterbreadcrum]

My class assigned me to write a fractions class.

//Colin Steele
//CSC2310
import java.io.*;
import java.util.*;
import java.awt.*;
public class Fractions
{
public static void main(String[] args)
{
Fraction f1 = new Fraction(1,1);
int x;
InputStreamReader input = new InputStreamReader(System.in);
x=input.read();
}
}

--------------------Configuration: <Default>--------------------
C:\Users\Colin\Desktop\Stuff\CSC2310\Colinsteele.j ava:13: unreported exception java.io.IOException; must be caught or declared to be thrown
x=input.read();
^
1 error

Process completed.

I get the unreported exception: java.io.IOException;must be caught or declared to be thrown

The method read is overloaded into the following
read(char[]) int
read(char[],int,int) int
read(CharBuffer) int
read() int

This may be a simple answer but I just can't figure it out!

[sehudson]

when you call read() on the InputStreamReader, you have to catch a java.io.IOException.

Basically putting in a catch so that if an IOException was to occur, you can handle it however you want to (maybe log something, let the user know, etc), as opposed to having the code stop running.

[misterbreadcrum]

And how do I implement a catch for the method??

[Fubarable]

And how do I implement a catch for the method??

Please look at the Java tutorials for questions like these. They have an excellent section on exception handling.

Edit: if you haven't yet found it on Google, the link is here: Exceptions

[coasterguy10]

add "throws IOException" to your main line so it reads, "public static void main(String[] args) throws IOException"

[Fubarable]

add "throws IOException" to your main line so it reads, "public static void main(String[] args) throws IOException"

No. In general it is not a good idea to throw an exception from the main method. Again, read the tutorial, learn to catch the exception and handle it.

[Tolls]

And, when handling it, at least do a printStackTrace().

[ankiit]

Hi,

you can try this one:-

import java.io.*;
import java.util.*;
import java.awt.*;
public class Fractions
{
public static void main(String[] args)
{
Fraction f1 = new Fraction(1,1);
int x;
InputStreamReader input = new InputStreamReader(System.in);

try
{
x=input.read();
}

catch(IOException io)
{
System.out.println("IOException" + e.getMessage());
}
}
}