Pledged Lab Quiz

This lab quiz is pledged.  You may use your textbook, the online String or Scanner references, and NOTHING ELSE.  However, you should still save your file into your home directory.  This includes any files in your home directory, previous assignments, slides, etc.  Note that there is a String class reference on page 877 of your textbook; Scanner reference on page 870.

You will need to submit a single file called LabQuiz1.java.  No skeleton code is being provided.

The TAs cannot help you with Java-related issues on this quiz.  If you are having problems getting JCreator to work, can't log in to the machines, etc., then you are welcome to ask the TAs for assistance.  If you do not understand what the lab is asking, the TAs may be able to help you (meaning if it's a problem with our explanation, then they can help you -- if you've been skipping the lectures so far and have no idea what any of this means, you are on your own).

Advice

• To maximize your points, make sure your programs compile successfully.
   
• If towards the end things are not going as well as you would want (i.e., the program does not compile), it might be best to try commenting out errant statements (i.e., put a // in front of them)
   
• If you run out of time, submit what you have -- there will be partial credit for this quiz.  Also remember that you can submit a file as many times as you want -- only the most recent submission is graded.  So once you have it working, submit what you have.

String Manipulation

The program you are to write will read in three values: two ints (we'll call them i and j), and one String (we'll call it s).  You should use .next() to read in the String.  And each value should be prompted for and read in separately.

The program must do a number of String operations:

1. The program will print the substring of s from i to the character right before j.  See below for an example of this execution part.
2. The program will print the first index of the character 'a' in s
3. The program will print the last index of 'a' in s
4. The program will print the upper case version of String s
5. The program will print the length of String s
6. Lastly, the program will print if the String is a "long" String or a "short" String.  Any String of 10 or more characters is considered "long"

Your program needs to be in a public class LabQuiz1, with the file being named LabQuiz1.java.

You are welcome to look at the online String or Scanner references, as well as the String class reference on page 877 of your textbook; Scanner reference on page 870.

Sample output

Note that your program should prompt for (and obtain) input on 3 separate lines (what's shown below compacts the input into one line).  And the numbering below is to show what output corresponds to the steps listed above; you don't have to print the numbers.

If the input is "2 5 asdfasdf", the program will print the following values

1. dfa
2. 0
3. 4
4. ASDFASDF
5. 8
6. short

Other Requirements

You are REQUIRED to include most of the good programming practices discussed in HW J1 (all but the test code).  For your reference, they are included below.

• Header: The comments at the very beginning of the file, and need to include your name, e-mail ID, 101 section (or 101-E, if appropriate), and a line or two about what this program does.
   
• Comments: A line or two before each major "block" (section of code, class, method, variable, etc.) describing what it does.
   
• Whitespace: A line or two between separate elements of the code (methods, code segments, etc.) and good indentation.
   
• Legend: The program should print out a line or two that states what the purpose of the program is (i.e. "This is a BMI calculator", or "Are you ready for an Ironman Triathlon? Let's find out!"). This should be the first line(s) printed to the screen.
   
• Echoing input: All user input should be echoed back to the screen. This can be a line saying "you entered 5" after the user enters each input, but can also be a single line saying, "You entered: Swim: 0.5, Bike: 1.3, Run: 0.7".
   
• Variable names: All final variables should be in all caps with underscores between the words, such as BOX_WIDTH. Non-final variable names should have the firstLetterOfEachWordCaptilized in the variable name (excepting the very first letter). Variable names should be relevant and informative, such as mileage and not m.
   
• Line length: The lines should not go over about 72 characters. Essentially, when displayed on an 80-character wide screen (what we are using), the line should not go past the end of the screen. You can have a println() statement, for example, use multiple lines (as long as each string starts and ends on the same line). JCreator tells you the column that the cursor is currently in (at the bottom on the status bar), so you can use that to gauge how long your lines are.

Submission

When you are finished, submit your LabQuiz1.java file.  You will have to "sign" a pledge on the submission.

Lastly, you should be able to pick up your test at the end of your lab quiz.  If it's not ready, then you can pick it up next week in lab.  Either way, your score will be available on the website by the end of the day tomorrow (you'll receive and e-mail about it).