Examples of java.util.regex.Pattern.split()

java.util.regex.Pattern.split()

Splits the given input sequence around matches of this pattern.

The array returned by this method contains each substring of the input sequence that is terminated by another subsequence that matches this pattern or is terminated by the end of the input sequence. The substrings in the array are in the order in which they occur in the input. If this pattern does not match any subsequence of the input then the resulting array has just one element, namely the input sequence in string form.

The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resulting array. If the limit n is greater than zero then the pattern will be applied at most n - 1 times, the array's length will be no greater than n, and the array's last entry will contain all input beyond the last matched delimiter. If n is non-positive then the pattern will be applied as many times as possible and the array can have any length. If n is zero then the pattern will be applied as many times as possible, the array can have any length, and trailing empty strings will be discarded.

The input "boo:and:foo", for example, yields the following results with these parameters:

Regex

Limit

Result

: 2 { "boo", "and:foo" }

: 5 { "boo", "and", "foo" }

: -2 { "boo", "and", "foo" }

o 5 { "b", "", ":and:f", "", "" }

o -2 { "b", "", ":and:f", "", "" }

o 0 { "b", "", ":and:f" }

@param input The character sequence to be split @param limit The result threshold, as described above @return The array of strings computed by splitting the inputaround matches of this pattern

Regex	Limit	Result
:	2	`{ "boo", "and:foo" }`
:	5	`{ "boo", "and", "foo" }`
:	-2	`{ "boo", "and", "foo" }`
o	5	`{ "b", "", ":and:f", "", "" }`
o	-2	`{ "b", "", ":and:f", "", "" }`
o	0	`{ "b", "", ":and:f" }`

    }


    static List<String> splitPath(String path, OperatingSystemFamily os) {
        Pattern s = os == WINDOWS ? WINDOWS_PATH_SPLITTER : UNIX_PATH_SPLITTER;
        List<String> l = new ArrayList<String>();
        for (String p : s.split(path)) {
            if (p.isEmpty()) continue;
            l.add(p);
        }
        return l;
    }

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        Pattern pattern = patternCache.get(regex);
        if (pattern == null) {
            pattern = Pattern.compile(regex);
            patternCache.put(regex, pattern);
        }
        return  pattern.split(toSplit, 0);
    }


     public synchronized static String[] split(ServletContext sc,
             String toSplit, String regex) {
        Map<String, Pattern> patternCache = getPatternCache(sc);

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        Pattern pattern = patternCache.get(regex);
        if (pattern == null) {
            pattern = Pattern.compile(regex);
            patternCache.put(regex, pattern);
        }
        return  pattern.split(toSplit, 0);
    }




    /**
     * <p>Returns the URL pattern of the

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      boolean deprel = false;
      for (int j=0; j < orderFileLines.size(); j++) {
        deprel = false;
        featureText.setLength(0);
        splitfeats = "";
        items = tabPattern.split(orderFileLines.get(j));
        if (items.length < 2) {
          throw new FeatureException("The feature specification file '"+specModelURL.toString()+"' must contain at least two columns.");
        }
        if (!(columnNameMap.containsKey(ColumnNames.valueOf(items[0].trim())) || columnNameMap.containsValue(items[0].trim()))) {
          throw new FeatureException("Column one in the feature specification file '"+specModelURL.toString()+"' contains an unknown value '"+items[0].trim()+"'. ");

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      final BufferedReader in = new BufferedReader(getGuide().getConfiguration().getConfigurationDir().getInputStreamReaderFromConfigFile(getModelName()+".dsm"));
      final Pattern tabPattern = Pattern.compile("\t");
      while(true) {
        String line = in.readLine();
        if(line == null) break;
        String[] cols = tabPattern.split(line);
        if (cols.length != 2) { 
          throw new GuideException("");
        }
        int code = -1;
        int freq = 0;

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        }
        int j = 0;
        try {
          problem.y[i] = Integer.parseInt(columns[j]);          
          for(j = 1; j < columns.length; j++) {
            final String[] items = pipePattern.split(columns[j]);
            for (int k = 0; k < items.length; k++) {
              try {
                int colon = items[k].indexOf(':');
                if (colon == -1) {
                  if (Integer.parseInt(items[k]) != -1) {

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        try {
          problem.y[i] = 
            Integer.parseInt(columns[j]);
          int p = 0;
          for(j = 1; j < columns.length; j++) {
            final String[] items = pipePattern.split(columns[j]);  
            for (int k = 0; k < items.length; k++) {
              try {
                if (Integer.parseInt(items[k]) != -1) {
                  xlist.add(p, new FeatureNode(Integer.parseInt(items[k])+offset, 1));
                  p++;

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      BufferedReader br = new BufferedReader(isr);
      String line = null;
      Option option = null;
      Pattern tabPattern = Pattern.compile("\t");
      while ((line = br.readLine()) != null) {
        String[] items = tabPattern.split(line);
        if (items.length < 3 || items.length > 4) {
          throw new OptionException("Could not load the saved option. ");
        }
        option = optionDescriptions.getOption(items[1], items[2]);
        Object ovalue;

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        if (fileLine.length() == 0 || fileLine.charAt(0) != '\t') {
          break;
        }
        String items[];
        try {
          items = tabPattern.split(fileLine.substring(1));
        } catch (PatternSyntaxException e) {
          throw new SymbolException("The header line of the symbol table  '"+fileLine.substring(1)+"' could not split into atomic parts. ", e);
        }
        if (items.length != 3) {
          throw new SymbolException("The header line of the symbol table  '"+fileLine.substring(1)+"' must contain four columns. ");

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        int j = 0;
        try {
          prob.y[i] = (double)Integer.parseInt(columns[j]);
          int p = 0;
          for(j = 1; j < columns.length; j++) {
            final String[] items = pipePattern.split(columns[j]);  
            for (int k = 0; k < items.length; k++) {
              try {
                if (Integer.parseInt(items[k]) != -1) {
                  xlist.add(p, new svm_node());
                  xlist.get(p).value = 1;

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