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I need help making Lowest price grocery program in Java

My code below
import java.util.*;
import java.io.*;
public class main {
public int finalcost;
public static void main(String[] args) throws FileNotFoundException, IOException {
Scanner input = new Scanner(System.in);
int totalAdd = 0;
boolean done = false;
// to store specific properties ex item size and price
HashMap<String, String> specificPropsMap = new HashMap<String, String>();
// stores an array list of all the sizes and price
ArrayList<HashMap<String, String>> propsList = new ArrayList<HashMap<String, String>>();
// the item list stores the name of the item as the KEY and item size and price
// as data
HashMap<String, ArrayList<HashMap<String, String>>> itemsMap = new HashMap<String, ArrayList<HashMap<String, String>>>();
// this stores the service name than the cost.this is the one we will be adding
// too after getting the data;
HashMap<String, Integer> cartMap = new HashMap<String, Integer>();
BufferedReader br = new BufferedReader(new FileReader("PA2.txt"));
String line = br.readLine();
while ((line = br.readLine()) != null) {
// stores the data base on commas
String[] fields = line.split(",");
String serviceName = fields[0];
String fileName = fields[1];
String cost = fields[2];
if (specificPropsMap.containsKey(serviceName)) {
// do nothing
} else {
specificPropsMap.put(serviceName, null);
}
// gets the file name from the first reader
BufferedReader brCVS = new BufferedReader(new FileReader(fileName));
String lineCVS = brCVS.readLine();
while ((lineCVS = brCVS.readLine()) != null) {
String[] cvsFields = lineCVS.split(",");
String brandName = cvsFields[0];
String nameItem = cvsFields[1];
String itemSize = cvsFields[2];
String itemPrice = cvsFields[3];
// check if itemname is in specificPropsMap
if (specificPropsMap.containsKey(cvsFields[1])) {
// do nothing
} else {
specificPropsMap.put(itemSize, nameItem);
}
propsList.add(specificPropsMap);
if (itemsMap.containsKey(nameItem)) {
// do nothing
} else {
itemsMap.put(nameItem, null);
}
} // end inner while loop
int stringCosttoInt = Integer.parseInt(cost.trim());
if (cartMap.containsKey(serviceName)) {
// do nothing
} else {
cartMap.put(serviceName, stringCosttoInt);
}
} // end outer while loop
System.out.println("Welcome to Assisgnment two app");
while (done == false) {
System.out.println("Enter the item you are looking for or enter done check out: ");
String key = input.nextLine(); // use key to find if item is in the itemsMap;
if (key == "done") {
done = true;
} else {
if (itemsMap.containsKey(key)) {
System.out.println("Enter the Size you want :");
// now check for the item name, than size, if not return item not there;
int sizeKey = input.nextInt(); // use key to find item in the area
if (itemsMap.containsValue(specificPropsMap.containsKey(sizeKey))) {
System.out.println("How many of " + key + " do you want:");
int numOfProduct = input.nextInt();
// add it to the cart;
} else {
System.out.println("No: " + sizeKey + " in the system");
}
} else {
System.out.println("No item by the name of: " + key + " in the system");
}
}
}
br.close();
input.close();
}
}
Question: How do I set the user input to search the item class to return the lowest total cost. The user enters item name, size and the amount. I know in storing the name in item, but I don't know how to match it with user input or how to get that data if that makes sense.2nd in also little confused when I read the file and i'm storing it as a String, I don't know how to make it into an int so I can do math with it..

Just to give you some help with the approach, I won't be going into detail about parsing, I think you got that covered.
Look at it from another perspective, from the input. What is the flow of the program?
User enters required item and size
Look if item is present
User enters quantity
Add to cart
Repeat
When 'done', check which Service offers lowest total price
Note: Assuming an item present in one Brand is present in all
So let's devise a Data Structure that can support this:
We need to maintain a Cart for each Service. In the end, we can cycle through each cart and return the lowest.
Maintain a Map<String, Integer> where String is the Service, and Integer is the total price
Whenever an Item is added by the user, add the price of that Item to each respective Service
Eg. If Lays is added, add price of Lays in Prime to total price of Prime, price of Lays in InstaCart to total price of InstaCart, etc
First thing you need to look up is if the Item is present; we can store it in a Map, say itemsMap.
What specific properties does each item have? There's service, brand, size, price. We can store it in another Map, say specificPropsMap.
Each Item can have multiple specific properties. i.e., There can be different combination of size, service, etc. for the same Item. So each Item needs to store multiple specific properties, which can be a List, say propsList.
To understand the above:
//Starting from the bottom-up
//To store specific properties
//Contains key-value pairs like: service = Amazon, brand = Nestle, size = 10g, price = 2
HashMap<String, String> specificPropsMap; //Has one set of specific props
//Consider an Item; it can have multiple specific properties, which we'll store as a List
//Eg: For Item = 'dark chocolate'
//specificProps1: service = Amazon, brand = Nestle, size = 10, price = 2
//specificProps1: service = InstaCart, brand = Cadbury, size = 10, price = 3
//Required: List<specificPropsMap>
ArrayList<HashMap<String, String>> propsList; //Has a list of specificPropsMaps for one item
//Now we need to store all Items; it can be a Map
//Required: Map<ItemName, propsList for that Item>
HashMap<String, ArrayList<HashMap<String, String>>> itemsMap;
//Initialize cart Map while parsing services
HashMap<String, Integer> cartMap; //Has initial values "Amazon" = 0, InstaCart = 0
//To find if an Item is present:
itemsMap.contains("Dark chocolate");
//Find prices from each service for that Item and size, and quantity
int reqSize = 10; //Assume req. size = 10
int reqQuantity = 5;
ArrayList<HashMap<String, String>> propsList = itemsMap.get("Dark chocolate")
for (HashMap<String, String> specificPropsMap : propsList) { //For each set of props
int size = Integer.parseInt(specificPropsMap.get("size"));
if (size == reqSize) {
String service = specificPropsMap.get("service"); //Say Amazon
int price = Integer.parseInt(specificPropsMap.get("price")); //Say 2
int initialPriceInCart = cartMap.get(service); //Initially 0
int finalPriceInCart = initialPriceInCart + price * reqQuantity;
cartMap.put(service, finalPriceInCart); //Cart price updated
}
}
//Find lowest priced service
String lowestPrice = Integer.MAX_VALUE; //Initially set as high as possible
String lowestService = "";
for (String key : cartMap.keySet()) {
if (cartMap.get(key) < lowestPrice) {
lowestPrice = cartMap.get(key);
lowestService = key;
}
}
General pointers that I can think of:
Population: Populate all these values initially while reading from the files.
Conversion : Convert values such as size, price to a standard (kg, cents/dollars, etc)
Naming : It's better to keep it descriptive (brand or brandName instead of bName)
Error handling : Add checks/try-catch blocks wherever necessary
Edit: Added steps. Might look a bit complex since we have some entries in the txt and some in the csv, but it's actually easy:
Read txt file; you now have a service and a csv file. Thus, for each service(outer loop)
Add the service as a key to cartMap if it's not already present
Create a new specificPropsMap, add service to this
Read the csv corresponding to that service. For each item(inner loop)
Store all props in the same specificPropsMap
You now have the prop item from the csv
Check if item is present in itemsMap
If present, skip to next step. If not, add item to the itemsMap as a key, with an empty List as value
Do itemsMap.get(item), you'll have the propsList
Add specificPropsMap to the propsList
Repeat for all items and all services.

asking about non-primitives arraylist

I have created ArrayList. How can i use this list to get method or attribute from the class. I tried but i could not reach any solution.
I tried to get into element in array list and get some attributes but i can't.
public static void printOptions() {
System.out.println("Welcome to our university!");
System.out.println("Operations:");
System.out.println("1- College");System.out.println("a) Number of Departments");System.out.println("b) Number of Courses");System.out.println("c) Number of Professors");System.out.println("d) Number of Students");System.out.println("e) Report");
System.out.println("2- Department");System.out.println("a) New");System.out.println("b) Number of Courses");System.out.println("c) Number of Students");System.out.println("d) Is Full");System.out.println("e) Enroll");System.out.println("f) Report");
System.out.println("3- Course");System.out.println("a) New");System.out.println("b) Number of Students");System.out.println("c) Assign");System.out.println("d) Is assigned");System.out.println("e) Professor Name");System.out.println("f) Is Full");System.out.println("g) Enroll");System.out.println("h) Report");
System.out.println("4- Professor");System.out.println("a) New");System.out.println("b) Display Salary");System.out.println("c) Get Raise");System.out.println("d) Report");
System.out.println("5- Student");System.out.println("a) New");System.out.println("b) Report");
System.out.println("6- Quit");
}
/**
* #param args the command line arguments
*/
public static void main(String[] args) {
// TODO code application logic here
printOptions() ;
List<Department> departmentList;departmentList = new ArrayList<>();
List<Course> courseList ;courseList = new ArrayList<>();
List<Professor> proffList = new ArrayList<>() ;
List<Student> studentList;studentList = new ArrayList<>() ;
Scanner in = new Scanner(System.in) ;
int d = 0 , c = 0 , p = 0 , s=0 ;
College AinShams = new College() ;
while (true){
String option = in.nextLine() ;
if(!"6".equals(option)) {
if ("2a".equals(option)) { // Define new department
System.out.println("Department Name:");
String depName = in.nextLine() ;
System.out.println("Department Description:");
String depDescripe = in.nextLine() ;
System.out.println("Department Max Students:");
int max_num = in.nextInt() ;
in.nextLine() ;
Department Department_Name = new Department(depName, depDescripe, max_num);
// departmentList.add(Department_Name);
departmentList.add(d, Department_Name);
d++ ;
AinShams.setDepart(departmentList);
}
else if ("4a".equalsIgnoreCase(option)) {//new proff
System.out.println("Professor Firstname:");
String firstName = in.nextLine() ;
System.out.println("Professor Lastname:");
String lastName = in.nextLine();
System.out.println("Professor telephone:");
String telephone = in.nextLine();
System.out.println("Professor address:");
String address = in.nextLine();
System.out.println("Professor salary:");
double salary = in.nextDouble() ;
Professor proff = new Professor(firstName, lastName, telephone, address, salary);
proffList.add(p,proff) ;
p++ ;
AinShams.setProf(proffList);
}
else if ("2e".equalsIgnoreCase(option)) {//add student in department
System.out.println("Department:");
String dep= in.nextLine() ;
System.out.println("Student:");
String stu= in.nextLine();
// System.out.println(AinShams.getDepart());
AinShams.getDepart().
/*for (int i = 0; i < AinShams.getDepart().size(); i++) {
}*/
}
System.out.println("============");
System.out.println("Enter Operation");
System.out.println("============");
}else {break ;}
}
}
}
In condition (2e), I need to get methods and attributes in class which I assigned in array List

AinShams.getDepart() is referring to an object which you defined as data type College:
College AinShams = new College();
The rest of the College code is not in this fragment so I cannot tell whether the .getDepart() method exists. Either way, the College is not an ArrayList.
If you want to reach the methods and fields of objects inside an ArrayList something like the following would work. As an example I take the ArrayList called departmentlist, and use the get() method to return the 0th element from that list. Assuming the 0th element of that class is an object of type Department, the .name asks for the name field (again, assuming this name variable exists in the Department class). The .getName() would be a better way to get the name value but requires you coding this method in the Department class.
departmentlist.get(0).name
departmentlist.get(0).getName()
By the way, consider reducing some of the "System.out.println()" clutter in the top of your code by formatting your output with the "\n" new line key. Try these two examples using 1 system.out.println call to print two lines of text:
System.out.println("Welcome to our university!" + "\n" + "Operations:");
System.out.println("Welcome to our university! \nOperations:");

You want to add a new student to a department. Your College class has other attributes like list of departments, professors, etc.
Approach:
You can get the Department object from the array list, by the department name (property) passed by the user in case-2e. Then use that object to insert new student to its student's list.
Code:
Your code can be something like below (Pardon any compilation error as I haven't used any IDE. Follow the approach):
String dept = in.nextLine();
Department department = AinShams.getDepart().stream().filter(department -> department.getName().contentEquals(dept)).limit(1);
department.getStudentList().add(new Student());
Follow the link for non-stream version:
How to find an object in an ArrayList by property
OR Use the following method:
Department findDepartment(List<Department> deptList, String dept) {
for(Department department : deptList) {
if(department.getName().equals(dept)) {
return department;
}
}
return null;
}

How to select random text value from specific row using java

I have three input fields.
First Name
Last item
Date Of Birth
I would like to get random data for each input from a property file.
This is how the property file looks. Field name and = should be ignored.
- First Name= Robert, Brian, Shawn, Bay, John, Paul
- Last Name= Jerry, Adam ,Lu , Eric
- Date of Birth= 01/12/12,12/10/12,1/2/17
Example: For First Name: File should randomly select one name from the following names
Robert, Brian, Shawn, Bay, John, Paul
Also I need to ignore anything before =
FileInputStream objfile = new FileInputStream(System.getProperty("user.dir "+path);
in = new BufferedReader(new InputStreamReader(objfile ));
String line = in.readLine();
while (line != null && !line.trim().isEmpty()) {
String eachRecord[]=line.trim().split(",");
Random rand = new Random();
//I need to pick first name randomly from the file from row 1.
send(firstName,(eachRecord[0]));

If you know that you're always going to have just those 3 lines in your property file I would get put each into a map with an index as the key then randomly generate a key in the range of the map.
// your code here to read the file in
HashMap<String, String> firstNameMap = new HashMap<String, String>();
HashMap<String, String> lastNameMap = new HashMap<String, String>();
HashMap<String, String> dobMap = new HashMap<String, String>();
String line;
while (line = in.readLine() != null) {
String[] parts = line.split("=");
if(parts[0].equals("First Name")) {
String[] values = lineParts[1].split(",");
for (int i = 0; i < values.length; ++i) {
firstNameMap.put(i, values[i]);
}
}
else if(parts[0].equals("Last Name")) {
// do the same as FN but for lastnamemap
}
else if(parts[0].equals("Date of Birth") {
// do the same as FN but for dobmap
}
}
// Now you can use the length of the map and a random number to get a value
// first name for instance:
int randomNum = ThreadLocalRandom.current().nextInt(0, firstNameMap.size(0 + 1);
System.out.println("First Name: " + firstNameMap.get(randomNum));
// and you would do the same for the other fields
The code can easily be refactored with some helper methods to make it cleaner, we'll leave that as a HW assignment :)
This way you have a cache of all your values that you can call at anytime and get a random value. I realize this isn't the most optimum solution having nested loops and 3 different maps but if your input file only contains 3 lines and you're not expecting to have millions of inputs it should be just fine.

Haven't programmed stuff like this in a long time.
Feel free to test it, and let me know if it works.
The result of this code should be a HashMap object called values
You can then get the specific fields you want from it, using get(field_name)
For example - values.get("First Name"). Make sure to use to correct case, because "first name" won't work.
If you want it all to be lower case, you can just add .toLowerCase() at the end of the line that puts the field and value into the HashMap
import java.lang.Math;
import java.util.HashMap;
public class Test
{
// arguments are passed using the text field below this editor
public static void main(String[] args)
{
// set the value of "in" here, so you actually read from it
HashMap<String, String> values = new HashMap<String, String>();
String line;
while (((line = in.readLine()) != null) && !line.trim().isEmpty()) {
if(!line.contains("=")) {
continue;
}
String[] lineParts = line.split("=");
String[] eachRecord = lineParts[1].split(",");
System.out.println("adding value of field type = " + lineParts[0].trim());
// now add the mapping to the values HashMap - values[field_name] = random_field_value
values.put(lineParts[0].trim(), eachRecord[(int) (Math.random() * eachRecord.length)].trim());
}
System.out.println("First Name = " + values.get("First Name"));
System.out.println("Last Name = " + values.get("Last Name"));
System.out.println("Date of Birth = " + values.get("Date of Birth"));
}
}

Reading a special txt file in java

What I want to do is read a text file that has humans and animals. It will compile but has an error when I try to run it. I think I need a for loop to read the stringtokenizer to decipher between the human and animal in the txt file so far this is my driver class.
txt file:
Morely,Robert,123 Anywhere Street,15396,4,234.56,2
Bubba,Bulldog,58,4-15-2010,6-14-2011
Lucy,Bulldog,49,4-15-2010,6-14-2011
Wilder,John,457 Somewhere Road,78214,3,124.53,1
Ralph,Cat,12,01-16-2011,04-21-2012
Miller,John,639 Green Glenn Drive,96258,5,0.00,3
Major,Lab,105,07-10-2012,06-13-2013
King,Collie,58,06-14-2012,10-05-2012
Pippy,cat,10,04-25-2015,04-25-2015
Jones,Sam,34 Franklin Apt B,47196,1,32.09,1
Gunther,Swiss Mountain Dog,125,10-10-2013,10-10-2013
Smith,Jack,935 Garrison Blvd,67125,4,364.00,4
Perry,Parrot,5,NA,3-13-2014
Jake,German Shepherd,86,11-14-2013,11-14-2013
Sweetie,tabby cat,15,12-15-2013,2-15-2015
Pete,boa,8,NA,3-15-2015
Source:
import java.util.Scanner;
import java.util.StringTokenizer;
import java.io.File;
import java.io.IOException;
/**
* This is my driver class that reads from a txt file to put into an array and uses the class refrences so it can use the menu and spit out
*
* #author ******
* #version 11/25/2015
*/
public class Driver
{
/**
* Constructor for objects of class Driver, what it does is read in the txt file gets the two class refrences and loops through to read through the whole file looking for string tokens to go to the next line
* and closes the file at the end also uses for loop to count number of string tokens to decipher between human and pets.
*/
public static void main(String[] args) throws IOException
{
Pet p;
Human h;
Scanner input;
char menu;
input = new Scanner(new File("clientdata.txt"));
int nBalance;
int id;
/**
* this while statement goes through each line looking for the string tokenizer ",". I want to count each "," to decipher between Human and Animal
*/
while(input.hasNext())
{
StringTokenizer st = new StringTokenizer(input.nextLine(), ",");
h = new Human();
h.setLastName(st.nextToken());
h.setFirstName(st.nextToken());
h.setAddress(st.nextToken());
h.setCiD(Integer.parseInt(st.nextToken()));
h.setVisits(Integer.parseInt(st.nextToken()));
h.setBalance(Double.parseDouble(st.nextToken()));
p = new Pet(st.nextToken(), st.nextToken(), Integer.parseInt(st.nextToken()), st.nextToken(), st.nextToken());
}
/**
* this is my seond while statement that loops the case switch statements and asks the user for client ID
*/
menu = 'Y';
while(menu == 'y' || menu == 'Y') {
System.out.print("\nChose one:\n A- client names and outstanding balance \n B- client's pets, name, type and date of last visit\n C-change the client's outstanding balance: ");
menu = input.next().charAt(0);
System.out.print("Enter client ID: ");
id = input.nextInt();
h = new Human();
if(id == h.getCiD())//if the id entered up top is equal to one of the id's in the txt file then it continues to the menu
{
p = new Pet();
switch(menu)
{ case 'A':
System.out.println("client name: " + h.getFirstName() + "outstanding balance: " + h.getBalance());
break;
case 'B':
System.out.println("pet's name: " + p.getName() + "type of pet: " + p.getTanimal() + "date of last visit: " + p.getLastVisit());
break;
case 'C':
System.out.println("what do you want to change the clients balances to?");
input.close();
}
}
else// if not then it goes to this If statement saying that the Client does not exist
{
System.out.println("Client does not exist.");
}
}
}
}

You have a number of issues you need to overcome...
For each line, you need to determine the type of data the line represents
You need some way to keep track of the data you've loaded (of the clients and their pets)
You need some way to associate each pet with it's owner
The first could be done in a number of ways, assuming we can change the data. You could make the first token meaningful (human, pet); you could use JSON or XML instead. But lets assume for the moment, you can't change the format.
The key difference between the two types of data is the number of tokens they contain, 7 for people, 5 for pets.
while (input.hasNext()) {
String text = input.nextLine();
String[] parts = text.split(",");
if (parts.length == 7) {
// Parse owner
} else if (parts.length == 5) {
// Parse pet
} // else invalid data
For the second problem you could use arrays, but you would need to know in advance the number of elements you will need, the number of people and for each person, the number of pets
Oddly enough, I just noticed that the last element is an int and seems to represent the number of pets!!
Morely,Robert,123 Anywhere Street,15396,4,234.56,2
------------^
But that doesn't help us for the owners.
For the owners, you could use a List of some kind and when ever you create a new Human, you would simply add them to the List, for example...
List<Human> humans = new ArrayList<>(25);
//...
if (parts.length == 7) {
// Parse the properties
human = new Human(...);
humans.add(human);
} else if (parts.length == 5) {
Thirdly, for the pets, each Pet should associated directly with the owner, for example:
Human human = null;
while (input.hasNext()) {
String text = input.nextLine();
String[] parts = text.split(",");
if (parts.length == 7) {
//...
} else if (parts.length == 5) {
if (human != null) {
// Parse pet properties
Pet pet = new Pet(name, type, age, date1, date2);
human.add(pet);
} else {
throw new NullPointerException("Found pet without human");
}
}
Okay, so all this does, is each time we create a Human, we keep a reference to the "current" or "last" owner created. For each "pet" line we parse, we add it to the owner.
Now, the Human class could use either a array or List to manage the pets, either will work, as we know the expected number of pets. You would then provide getters in the Human class to get a reference to the pets.
Because out-of-context code can be hard to read, this is an example of what you might be able to do...
Scanner input = new Scanner(new File("data.txt"));
List<Human> humans = new ArrayList<>(25);
Human human = null;
while (input.hasNext()) {
String text = input.nextLine();
String[] parts = text.split(",");
if (parts.length == 7) {
String firstName = parts[0];
String lastName = parts[1];
String address = parts[2];
int cid = Integer.parseInt(parts[3]);
int vists = Integer.parseInt(parts[4]);
double balance = Double.parseDouble(parts[5]);
int other = Integer.parseInt(parts[6]);
human = new Human(firstName, lastName, address, cid, vists, balance, other);
humans.add(human);
} else if (parts.length == 5) {
if (human != null) {
String name = parts[0];
String type = parts[1];
int age = Integer.parseInt(parts[2]);
String date1 = parts[3];
String date2 = parts[4];
Pet pet = new Pet(name, type, age, date1, date2);
human.add(pet);
} else {
throw new NullPointerException("Found pet without human");
}
}
}

What about using split() function instead of using StringTokenizer?
Say, You can change your first while loop like below:
while (input.hasNext()) {
// StringTokenizer st = new StringTokenizer(input.nextLine(), ",");
String[] tokens = input.nextLine().split(",");
if (tokens.length == 7) {
h = new Human();
h.setLastName(tokens[0]);
h.setFirstName(tokens[1]);
h.setAddress(tokens[2]);
h.setCiD(Integer.parseInt(tokens[3]));
h.setVisits(Integer.parseInt(tokens[4]));
h.setBalance(Double.parseDouble(tokens[5]));
} else {
p = new Pet(tokens[0], tokens[1], Integer.parseInt(tokens[2]), tokens[3], tokens[4]);
}
}
And for keeping track of which pet belongs to which human, you can append an arrayList of type Pet in Human class like below:
ArrayList<Pet> pets = new ArrayList<>();
And say you have another ArrayList of type Human named humans in the main function. So, you could append in if block like:
humans.add(h);
and in the else section, you could append in else block:
humans.get(humans.size()-1).pets.add(p);

You can try something like this -
Populate a map and then using that you can assign values according to your requirement.
public void differentiate(){
try {
Scanner scan=new Scanner(new BufferedReader(new FileReader("//your filepath")));
Map<String,List<String>> map=new HashMap<String, List<String>>();
while(scan.hasNextLine()){
List<String> petList=new ArrayList<String>();
String s=scan.nextLine();
String str[]=s.split(",");
String name=str[1]+" "+str[0];
int petCount=Integer.parseInt(str[str.length-1]);
for(int i=1;i<=petCount;i++){
String petString=scan.nextLine();
petList.add(petString);
}
map.put(name, petList);
}
Set<String> set=map.keySet();
for(String str:set){
System.out.println(str+" has "+map.get(str)+" pets");
}
}
catch (FileNotFoundException e) {
System.out.println(e.getMessage());
}
}

Ignore duplicate in string and print string once

Pretty much for my assignment I have to List all the courses (just the course code) that have classes in a given building on a given day such that any part of the class is between the given times. Each course involved should only be listed once, even if it has several classes. I have done everything except listing the course once, even if it has several classes. How do I ignore duplicate strings from a file?
public void potentialDisruptions(String building, String targetDay, int targetStart, int targetEnd){
UI.printf("\nClasses in %s on %s between %d and %d%n",
building, targetDay, targetStart, targetEnd);
UI.println("=================================");
boolean containsCourse = false;
try {
Scanner scan = new Scanner(new File("classdata.txt"));
while(scan.hasNext()){
String course = scan.next();
String type= scan.next();
String day = scan.next();
int startTime = scan.nextInt();
int endTime = scan.nextInt();
String room = scan.next();
if(room.contains(building)){
if(day.contains(targetDay)){
if(endTime >= targetStart){
if( startTime<= targetEnd){
UI.printf("%s%n", course);
containsCourse = true;
}
}
}
}
}
if(!containsCourse){
UI.println("error");
}
}
catch(IOException e){
UI.println("File reading failed");
}
UI.println("=========================");
}

You can put all the string token in Set and check if that token contain in Set befor you process further as below :-
// Declration
....
Set courseSet = new HashSet();
...
// Check befor you process further
if(!courseSet.contains(course))
{
...
// Your Code...
...
courseSet.add(course)
}

You could put the courses in a Set and loop over them since a Set always contains unique values.