[SOLVED] CS Java import java.io.IOException;

import java.io.IOException;
import org.antlr.v4.runtime.*;

public class csce322hw01pt02driver{
public static void main(String args[])
{
CharStream input = null;
if( args.length == 1 )
{
try {
input = CharStreams.fromFileName( args[0] );
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
else
{
System.err.println( File Not Provided );
System.exit(0);
}

csce322hw01pt02Lexer lexer = new csce322hw01pt02Lexer( input );
CommonTokenStream tokens = new CommonTokenStream( lexer );
csce322hw01pt02Parser parser = new csce322hw01pt02Parser( tokens );
lexer.removeErrorListeners();
parser.removeErrorListeners();
lexer.addErrorListener( new csce322hw01pt02error() );
parser.addErrorListener( new csce322hw01pt02error() );
parser.gravityGame();
}
}