Compsci 100e, Fall 2009, Tagcloud Exercises

import java.io.*;

public class SimpleCloudMaker {
    public static void main(String[] args) throws IOException {
        String[] words = { "Computer", "Duke", "Fun", "Interesting",
                "Knowledge", "Science", "University", "Work", };
        int[] wordClass = { 5, 10, 20, 15, 18, 5, 3, 25 };

        CSSMaker css = new CSSMaker();
        String header = css.makeHeader();
        String footer = css.makeFooter();
        File temp = File.createTempFile("tagger", ".html");
        FileWriter fileWriter = new FileWriter(temp);
        fileWriter.write(header);
        for (int k = 0; k < words.length; k++) {
            String htm = css.makeHTML(words[k], wordClass[k]);
            fileWriter.write(htm);
        }
        fileWriter.write(footer);
        fileWriter.flush();
        BareBonesBrowserLaunch.openURL("file://" + temp.getAbsolutePath());
    }
}

Questions

1. Why are the words in the text cloud:
   1. in alphabetical order?
   2. reading left-to-right?
   3. reading top-to-bottom?

2. Why are the words Computer and Science the same size?

3. The word in the biggest font of the text cloud is Work. What changes should you make in the code so that Fun has the same emphasis/size as Work (don't change the size of Work)?

4. If you add the string Algorithm as the first entry of the array words and the number 20 as the first entry of wordClass a new tag cloud will be generated with Algorithm appearing with the same size as Fun. Why does this change work without modifying the rest of the code?

5. What is the point of the declaration FileWriter fileWriter? Why does that declaration not cause an error? Is it a good idea?

6. The class CSSMaker is used to generate the CSS/HTML that helps create the tag cloud. What are the names of the three methods called in this class and what type of value does each method return?

7. One class and one exception are made accessible in the program because of the statement import java.io.*, what are these?

8. The method openURL is a static method. How can you tell it's a static method and what class is is the method found in?

9. What is the purpose of the call fileWriter.flush()?