Assignment #12 The attached file (attendance.txt)

Assignment #12
1)    The attached file (attendance.txt) is a list of email addresses you collected for a conference your company hosted.  Create a program that will parse each email address by its name and company.  (Note: email parser object below).   The company should be sorted in the first column and the person’s name associated with the company should be sorted in the second column; separated with tab character.  (first sort is by company; secondary sort is by firstname.lastname).  
public class Email {

              private String emailStr;

              Email() {  }
 
Email(String str) {
                    emailStr = str;
              }

              public String parseEmailName() {
                     String name;
                     int pos = emailStr.indexOf('@');

                     name = emailStr.substring(0,pos);

                     return name;

             }

              public String parseCompanyName() {
                    String company;
                     pos = emailStr.indexOf('@');
                     dot = emailStr.lastIndexOf('.');
    
                    company = emailStr.substring(pos+1, dot);
                    return company;

}

              public String parseExtension() {
                   int ext;
                   int dot = emailStr.lastIndexOf('.');
  
                   ext = emailStr.substring(dot+1,emailStr.length());
                   return ext;
              }

}


Sample output is listed below:  

amzn    bob.freed
amzn    caitlin.thomas
amzn    edward.flak
amzn    jill.bennet
amzn    mike.reade
fb        chris.booker
fb        fred.smith
fb        jane.bland
fb        megan.hill
goog    gary.teafer
goog    john.kohl
goog    larry.page
goog    phil.heal
goog    zara.war
msft    alan.gret
msft    darlene.neddle
msft    don.shaffer
msft    ken.smith
msft    sue.flemming
orcl        heidi.opal
orcl        john.voy
orcl        larry.lee
orcl        mark.lite


2)    Create a histogram on the number of attendees per company for the conference.  (can be in same program as #1)

3)    Check if bill.gates attended the conference.  Output that Bill Gates attended conference.  (can be in same program as #1)








4)    [Optional] Create an output text file for the output above so that it can be imported in Excel for further analysis.  One method of code to write text to an output file:  (can be in same program as #1)

    String text = "my text\r\n";
            BufferedWriter output = null;
            try {
                    File file = new File("example.txt");
                    output = new BufferedWriter(new FileWriter(file));
                    output.write(text);
            } catch ( IOException e ) {
                    e.printStackTrace();
            } finally {
                         if ( output != null ) {
                                  output.close();  // need to close file to write to a file
              }
        }