StrLenCommand.java

public class StrLenCommand extends Node
{
    public Parser parser;
    
    public StrLenCommand() {}
    
    public StrLenCommand(Parser parser)
    {
        this.parser = parser;
    }
           
    public Object eval()
    {
        return new Integer(((String) parser.getVariable("str")).length());
    }
}