We will demonstrate POS tagging using OpenNLP, Stanford API, and LingPipe. Each of the examples will use the following sentence. It is the first sentence of Chapter 5, At A Venture of Twenty Thousands Leagues Under the Sea by Jules Verne:

private String[] sentence = {"The", "voyage", "of", "the", 
    "Abraham", "Lincoln", "was", "for", "a", "long", "time", "marked", 
    "by", "no", "special", "incident."};

The text to be processed may not always be defined in this fashion. Sometimes the sentence will be available as a single string:

String theSentence = "The voyage of the Abraham Lincoln was for a " 
    + "long time marked by no special incident.";

We might need to convert a string to an array of strings. There are numerous techniques for converting this string to an array of words. The following tokenizeSentence method performs this operation:

public String[] tokenizeSentence(String sentence) {
    String words[] = sentence.split("S+");
    return words;
}

The following...