COP 2551 – Introduction to OOP Program #4Due: Wednesday, August 3rd, 2011 – midnightDrop dead: Thursday, August 4th, 2011 - midnightUsing NetBeans 6.9 or later version you are to write a Java program using OOP principles to accommodate the following functionality Assignment #4Objectives:Provide student with experience building arrays of objects Provide student with opportunity in doing file input and output.Provide student with exercises in learning UMLProvide student with exercises in Javadoc and its various formatsProvide student with exercises in searching and traversing the array of objects. Functionality:Using the external file States.txt, you are to do the following: 1. Build an array of State objects. You are to develop a class named State and create as many objects of this type – one object for each record (line) from the input file. (Take a look at the file. The first several lines describe the relative positions of the data underneath. You may eliminate those lines and start reading from Washington, etc. When you Save Target As to download this state file, you may eliminate those first lines at that time. But you need the information in your program in order to parse. Thus, onlyprocess the data lines.You are not to alter the data, however, in any way.) Each state object will have properties as shown and defined individually as Strings, ints, or whathaveyou, as appropriate for each state object. Hint: you may use substring method in class String to parse as expected. Please note that the first two lines provide the layout of the data below. 2. Display files Requirement. From main() you are to write code to display the array of objects to the screen – recommend using toString(). This is to include a nice looking header spanning the display line followed by nicely spaced columns of state attributes aligned under their respective header. Text data is to be left justified; numeric data, always right justified with commas as appropriate.3. Copy the array of objects to an external file too, and name the output file, outStates.txt. See slides for example. You will need FileWriter and similar classes / objects.For the file output, only write the records. No header line. So the individual linesshould look like what you display in #2 above – nicely spaced out; no header.4. Scan and Total the Populations Requirement. Using the array of State objects that you have built, you are to examine each state object in turn and accumulate data. You are to access each state object in turn and total up the state populations per region. (Each state belongs to a region, as you can see from the data) At the end of scanning and accumulating this data from your array of states,you are to print out a header that says State Population By Region (left justified) (see ahead)and underneath this, you are to print the region name, the number of states and the average population of states in that region. Your format for these detail lines should appear as:State Population By RegionNew England 6 321,123 (or whatever average population is)Middle Atlantic 6 x,xxx,xxxetc.(note the spacing; use the formatting links provided on my web page) Note also that I only have three regions.At the end of displaying these lines for each of the regions, you are to skip a couple of lines and display:Total State Population of the Indicated Regions is: (this will be a single line). This will look like:Total State Population for the West is 21,233,222Total State Population for the Middle_Atlantic is 212,222,222etc.At the very end, print an overall total in the format:Overall State Count nn 331,222,333 (or whatever you add up to)nn is the total number of states processed (number of objects) and the population is the total population of all those states processed.6. Search Requirement. Bonus. 20 points to be applied to your Programming Grade. Please note: This will ONLY apply if everything else meets the specifications. This cannot make up for missing UML, Javadoc, unmet specifications, etc., okay? All else must be wonderful for thisbonus to apply.You are to search through the entire array of State objects that are in region 6 and region 3. If any of those state populations exceed 5,000,000, you are to display: (for example)Region: SouthState: GeorgiaState population: 8,345,111 (include the commas!)<blank line>Region: SouthState: FloridaState capital: TallahasseeState population: 14,345,444<blank line>Region: WestState: CaliforniaState capital: SacramentoState population: 32,444,555Etc.You are to process region 3 before processing region 6.Prior to displaying these detail lines, you are to display the header:State Populations Exceeding 5,000,000 for Regions 3 and 6.The detail lines above are to appear underneath, as displayed – a single blank line separates individual sets of three lines as shown above.At the end of searching, you are to display the number of successful searches according to the format:<blank line>Summary Statistics:Number of State Populations Exceeding 5,000,000: <an integer>UMLYou are to include a UML class diagram. You may use Word or Power Point. No other technology may be used! I prefer Power Point but I will accept Word.Use the examples in your 2551 text. Each class listed in your UML diagram must have attributes listed (name, type). Methods must be shown with visibility indicator, and number /type of arguments plus the return type.Connect all classes (label the associations). Use UML format not Java. See previous lectures and your text for examples. Remember, static attributes / methods are underlined. Include Constructors in each class; ‘Drag’ your UML design file into your P4 subfolder within your COP2551 desktop folder. It will be included in the zip file to me. All other files should also be included in this folder which also must include the initial States file too.Please note that this file MUST be included within your folder – not separately submitted.JavadocAll programming is to be accompanied by appropriate Javadoc. ALL methods are to have Javadoc comments preceding them (in your source code). Appropriate documentation for methods consists of a short description (single sentence) plus any parameters and any return types specified such as @params and @returns. Appropriate documentation for classes includes several sentences describing the purpose of the class. Include @author and any other
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