Setting Command Line Arguments for my Class

Question

HI,
How do I set the command line arguments for my debug class. For example , I would like my user to type :
java Debug -LEVEL1
What should I do to implement this behaviour.
Thanks in advance...

Answer 1

     public static void main (String[] args){
          if(args.length > 0){
               int j = 0;
               BMsearch search = new BMsearch();
               try{
                    while (j < args.length){
                         if(args[j].equalsIgnoreCase(ONE_PATERN)){
                              search.addPaternForSearch(args[j+1]);
                              j = j+2;
                         else if (args[j].equalsIgnoreCase(PATERNLIST)){
                              j++;
                              while( ! (args[j].startsWith("-")) ){
                                   search.addPaternForSearch(args[j]);
                                   j++;
                              }//end while
                         else if (args[j].equalsIgnoreCase(PATERNFILE)){
                              j++;
                              search.readPaternFile(args[j]);
                              j++;
                         else if(args[j].equalsIgnoreCase(MATCH_H)){
                              search.heuristic = MATCH_HEURISTIC;
                              j++;
                         else if(args[j].equalsIgnoreCase(MATCH_H2)){
                              search.heuristic = MATCH_HEURISTIC_TWO;
                              j++;
                         else if(args[j].equalsIgnoreCase(OCC_H)){
                              search.heuristic = OCC_HEURISTIC;
                              j++;
                         else if(args[j].equalsIgnoreCase(COMB_H)){
                              search.heuristic = COMBINED_HEURISTIC;
                              j++;
                         else if(args[j].equalsIgnoreCase(JAVA_S)){
                              search.heuristic = JAVA_NATIVE;
                              j++;
                         else if(args[j].equalsIgnoreCase(TEXTFILE)){
                              j++;
                              search.readFileIn(args[j]);
                              j++;
                         else if(args[j].equalsIgnoreCase(TEXTURL)){
                              j++;
                              search.readURLFileIn(args[j]);
                              j++;
                         else if(args[j].equalsIgnoreCase(STOPatFIRST)){
                              search.searchall = false;
                              j++;
                         else if(args[j].equalsIgnoreCase(STOPatLAST)){
                              search.searchall = true;
                              j++;
                         else if(args[j].equalsIgnoreCase(VERBOSE)){
                              search.verbose = true;
                              j++;
                         else if(args[j].equalsIgnoreCase("-h") || args[j].equalsIgnoreCase("-help")){
                              printHelp();
                              Start = false;
                              break;
                         else{
                              System.out.println(" Error while parsing Parameter. ");
                              System.out.println(" type java BMsearch -help for all Options");
                              Start = false;
                              break;
                    }// end outer while
               catch(Exception e){
                    System.out.println(" Error while parsing Parameter. ");
                    System.out.println(" type java BMsearch -help for all Options");
                    Start = false;
                    j = args.length;
               if(Start){
                    if(search.verbose)System.out.println(" Parameter parsed, beginning with search ...");
                         search.starttimeTotal = System.currentTimeMillis();
                    search.search();
                    search.stoptimeTotal = System.currentTimeMillis();
                    System.out.println(" Whole search took:  " + (search.stoptimeTotal - search.starttimeTotal) + " milliseconds.(Brutto) ");
          else{
               System.out.println(" Error while parsing Parameter. ");
               System.out.println(" type java BMsearch -help for all Options");
     }//end MAINThis is takem from one of my command line classe (a Boyer Moore Pattern-Matching application from an exercise). I don't know if this is the best way, but thats what I have done there for passing some arguments, where the order of them isn't pre-given (you can pass the params in the order you want).
The CAPITAL vars are pre-defined final Strings holding the param-names, e.g.
public static final String ONE_PATERN = "-p";
public static final String PATERNLIST = "-plist";
public static final String PATERNFILE = "-pfile";Another trick sometimes used in Linux/Unix, if you have only false/true combinations, are numbers from pow 2 (2,4,8,16). In C they are used because of the binary representation, but it has some benefits. E.g. a value of 2 (0010) and another true set on 4 (0100) results binary in 6 (0110), so you can mix parameters in only one value, and with a byte - array you could check, if the flag for a given param is set. But this way is a little tricky for the end-user.