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Professional Java Homework helper

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Lincoln, B

Master’s Degree in Programming, University of Greenwich, UK


Professional Java Homework helper


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Data types in Java

class Artifact { private String Name; private int ArtifactID; private int ArtifactYear; private int AcquiredYear; private double Value; public Artifact() { Name = "ARTIFACT"; ArtifactID = 0; ArtifactYear = 0; AcquiredYear = 0; Value = 0; } public Artifact(String Name, int ArtifactID, int ArtifactYear, int AcquiredYear, double Value) { setName(Name); setArtifactID(ArtifactID); setArtifactYear(ArtifactYear); setAcquiredYear(AcquiredYear); setValue(Value); } public void setName(String Name) { this.Name = Name; } public void setArtifactID(int ArtifactID) { this.ArtifactID = ArtifactID; } public void setArtifactYear(int ArtifactYear) { this.ArtifactYear = ArtifactYear; } public void setAcquiredYear(int AcquiredYear) { this.AcquiredYear = AcquiredYear; } public void setValue(double Value) { this.Value = Value; } public String getName() { return Name; } public int getArtifactID() { return ArtifactID; } public int getArtifactYear() { return ArtifactYear; } public int getAcquiredYear() { return AcquiredYear; } public double getValue() { return Value; } public String toString() { return "*********************************************************\nName: " + Name + "\nArtifactID: " + ArtifactID + "\nArtifactYear: " + ArtifactYear + "\nAcquiredYear: " + AcquiredYear + "\nValue: " + Value+"\n"; } } import java.io.File; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.Scanner; import java.io.FileWriter; import java.io.IOException; public class Lab09MuseumArtifacts { public static void main(String[] args) { ArrayList< Artifact > artifacts = new ArrayList< Artifact > (); try { File ArtifactData = new File("D:\\My Stuff\\eclipse\\temp\\src\\temp\\ArtifactData.txt"); Scanner ArtifactDataReader = new Scanner(ArtifactData); while (ArtifactDataReader.hasNextLine()) { String data = ArtifactDataReader.nextLine(); String[] dataArray = data.split(" "); artifacts.add(new Artifact(dataArray[0], Integer.parseInt(dataArray[1]), Integer.parseInt(dataArray[2]), Integer.parseInt(dataArray[3]), Double.parseDouble(dataArray[4]))); } ArtifactDataReader.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } try { FileWriterArtifactMaster = new FileWriter("D:\\My Stuff\\eclipse\\temp\\src\\temp\\ArtifactMaster.txt"); FileWriterArtifactError = new FileWriter("D:\\My Stuff\\eclipse\\temp\\src\\temp\\ArtifactError.txt"); int errorRecordCount=0; int validRecordCount=0; for (int i = 0; i 2020) { errors = errors + "Artifact Year must be less than 2020\n"; } if (artifact.getAcquiredYear() <= 1899) { errors = errors + "Acquired Year must be greater than 1899\n"; } if (artifact.getAcquiredYear() 2020) { errors = errors + "Acquired Year must be less than or equal to 2020\n"; } if (artifact.getValue() < 0) { errors = errors + "Artifact value must be greater than zero\n"; } if(!errors.equals("")) { if(errorRecordCount==0) { ArtifactError.write(artifact.toString()+"##########ERRORS########\n"+errors); } else { ArtifactError.append(artifact.toString()+"##########ERRORS########\n"+errors); } System.out.print(artifact.toString()+"##########ERRORS########\n"+errors); errorRecordCount++; } else { if(validRecordCount==0) { ArtifactMaster.write(artifact.toString()); } else { ArtifactMaster.append(artifact.toString()); } System.out.print(artifact.toString()); validRecordCount++; } } System.out.println("\nGood Records: "+validRecordCount); System.out.println("Records with errors: "+errorRecordCount); ArtifactMaster.close(); ArtifactError.close(); } catch (IOException e) { e.printStackTrace(); } } }

Varuable Contolled While LOOP

import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub // First of all, define the scanner Scanner sc = new Scanner(System.in); // Define helper variables String userName = ""; int user_option; int stop = 0; // this variable will tell the while-loop when to end // In order to keep asking the user for the name (in case h/she wants to re-enter it), we have // to use a while loop, that will be cancelled when the user enters "No" while(stop == 0) { // User user for name System.out.print("Please enter your name: "); userName = sc.next(); // Ask if user wants to re-enter its name int invalid_option = 1; // variable equals to 1 if the option entered is invalid while(invalid_option == 1) { System.out.print(userName + " do you want to re-enter your name? Yes=1/No=0: "); user_option = sc.nextInt(); if(user_option == 1) // user entered Yes invalid_option = 0; else if(user_option == 0) // user entered No { invalid_option = 0; stop = 1; // stop the main loop } else System.out.println("Invalid option. Please enter Yes=1/No=0"); } } // If user do not want to re-enter its name, the program terminates and the farewell message is displayed System.out.println("Have a great day " + userName); // close scanner sc.close(); } } /* */