java error

I have the follwing error:

com\psol\xbe2\Final.java:11: unreported exception java.io.FileNotFoundException;
 must be caught or declared to be thrown
        BufferedReader in = new BufferedReader(new FileReader("ex.txt"));
                                               ^
com\psol\xbe2\Final.java:14: unreported exception java.io.IOException; must be c
aught or declared to be thrown
        while ((str = in.readLine()) != null)
                                 ^
com\psol\xbe2\Final.java:18: unreported exception java.io.IOException; must be c
aught or declared to be thrown
        in.close();
                ^
3 errors

java file:
"
package com.psol.xbe2;

import java.io.*;

public class Final
   
{
    public static void main (String args[])
           {
       
        BufferedReader in = new BufferedReader(new FileReader("ex.txt"));
        String str;
        System.out.println("rrrrr");
        while ((str = in.readLine()) != null)
        {
             System.out.println(str);
        }
        in.close();
        }    
}
"
badour_maAsked:
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Ajay-SinghCommented:
> public static void main (String args[])


change to

public static void main (String args[]) throws IOException
0

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