Main.java:3: error: cannot find symbol
public static void main(String args[])throws IoException;
^
symbol: class IoException
location: class demo
Main.java:3: error: missing method body, or declare abstract
public static void main(String args[])throws IoException;
^
Main.java:5: error: cannot find symbol
int n =Integer.parseInt(args[0]);
^
symbol: variable args
location: class demo
3 errors