How to extend an abstract Syntax Analyzer Java class for a simple programming language like Ada

I need to write a Syntax Analyser Java class. To do so, I am supposed to extend an Abstract Syntax Analyzer java class that is provided.

I know this should be quite straightforwards, but I've spent quite a healthy amount of time trying to get started and just feel... stuck.

This is the abstract class I have been provided with.

public abstract class AbstractSyntaxAnalyser
{

    LexicalAnalyser lex ;

    Token nextToken ;

    Generate myGenerate = null;
 

    public abstract void _statementPart_() throws IOException, CompilationException;
 

    public abstract void acceptTerminal(int symbol) throws IOException, CompilationException;
 

       
    public void parse( PrintStream ps ) throws IOException
    {
        ps.println( lex.getFilename() );
        myGenerate = new Generate();
        try {
            nextToken = lex.getNextToken() ;
            _statementPart_() ;
            acceptTerminal(Token.eofSymbol) ;
            myGenerate.reportSuccess() ;
            ps.println( "OK\n" );
        }
        catch( CompilationException ex )
        {
            ps.println( "Compilation Exception" );
            ps.println( ex.toTraceString() );
            ps.println( "STOP\n" );
        }
    }
}

As a new Java user, I would really appreciate help and guidance on how to get this project moving as this is merely the first step in a whole list of things to do and I just can't seem to make any headway..

All the best!

To extend that class you need to provide an implementation of all the abstract methods. A do-nothing example would be

public class MySyntaxAnalyzer extends AbstractSyntaxAnalyzer{

   public void _statementPart_() throws IOException, CompilationException{
   }

   public void acceptTerminal(int symbol) throws IOException, CompilationException{    
   }
}