Suppose that we want to help physicians to diagnose illnesses. A physician obser
ID: 3716993 • Letter: S
Question
Suppose that we want to help physicians to diagnose illnesses. A physician observes a patient's symptoms and considers the illnesses that could be associated with those symptoms. Design and implement a class PhysiciansHelper that provide a list of those illnesses.
PhysiciansHelper should contain a dictionary of illnesses and symptoms. A method should read a text file of illnesses and their symptoms into the dictionary. See format in sample data file.
PhysiciansHelper should read a list of symptoms for a patient. A method should read a list of symptoms and store into a list. Then, it finds a list illnesses that are associated with those symptoms. See format in sample run output.
Note: I have modified specification and requirements of this project
Project requirements:
? You will need to complete two methods in PhysiciansHelper class:
public void processDatafile();
public void processSymptoms();
Refer to PhysiciansHelper for detailed info.
? You must use the predefined private Map<String, List<String>> symptomChecker to store symptoms to illnesses mapping info. See format in sample run output.
? All string data are not case sensitive, i.e. should work for either uppercase or lowercase letters.
? In processSymptoms() methods, you must
o list possible symptoms in sorted order.
o read user input symptoms in single line
o check for invalid symptoms and eliminate duplicated symptoms
o display result in format as shown in sample output (must count number of matched symptoms)
? Use Java API Map and List in your project
https://docs.oracle.com/javase/8/docs/api/java/util/Map.html
https://docs.oracle.com/javase/8/docs/api/java/util/List.html
Here are some methods that you may need:
Map: get(), put(), containsKey(), keySet(), entrySet()
List: add(), contains(), size()
Compile program: javac PhysiciansHelper.java
Sample Run: Note: I expect similar output from your program
$ cat sample_data.txt // contents of sample data file
cold: runny nose, cough, sore throat
flu: runny nose, cough, sore throat, muscle aches, fever
mumps: high fever, rash, swelling
whooping cough: cough, rash, high fever
acid reflux: chest pain, burping
chickenpox: fever, blister
measles : runny nose, cough, fever, rash
norovirus : nausea, diarrhea, vomiting
ague: sweatiness, achy, high fever
$ javac PhysiciansHelper.java
$ java PhysiciansHelper
Enter data filename: sample_data.txt
============================================
symptomChecker map: // display contents of map
achy=[ague]
blister=[chickenpox]
burping=[acid reflux]
chest pain=[acid reflux]
cough=[cold, flu, whooping cough, measles]
diarrhea=[norovirus]
fever=[flu, chickenpox, measles]
high fever=[mumps, whooping cough, ague]
muscle aches=[flu]
nausea=[norovirus]
rash=[mumps, whooping cough, measles]
runny nose=[cold, flu, measles]
sore throat=[cold, flu]
sweatiness=[ague]
swelling=[mumps]
vomiting=[norovirus]
============================================
The possible symptoms are: // display symptoms in sorted order
achy
blister
burping
chest pain
cough
diarrhea
fever
high fever
muscle aches
nausea
rash
runny nose
sore throat
sweatiness
swelling
vomiting
============================================
Enter symptoms: cough,rash,cough,fever,blisterx,cough,runny NOSE
=>duplicate symptom:cough
=>invalid symptom:blisterx
=>duplicate symptom:cough
============================================
PatientSymptoms list: [cough, rash, fever, runny nose]
Possible illnesses that match any symptom are:
==> Disease(s) match 1 symptom(s)
chickenpox
mumps
==> Disease(s) match 2 symptom(s)
whooping cough
cold
==> Disease(s) match 3 symptom(s)
flu
==> Disease(s) match 4 symptom(s)
measles
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
sample_data.txt
cold: runny nose, cough, sore throat
flu: runny nose, cough, sore throat, muscle aches, fever
mumps: high fever, rash, swelling
whooping cough: cough, rash, high fever
acid reflux: chest pain, burping
chickenpox: fever, blister
measles : runny nose, cough, fever, rash
norovirus : nausea, diarrhoea, vomiting
ague: sweatiness, achy, high fever
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
PhysiciansHelper.java
import java.util.*;
import java.io.*;
public class PhysiciansHelper
{
// symptom to illnesses map
private Map<String, List<String>> symptomChecker;
/* Constructor symptomChecker map using TreeMap */
public PhysiciansHelper()
{
// use TreeMap, i.e. sorted order keys
symptomChecker = new TreeMap<String,List<String>>();
} // end default constructor
/* Reads a text file of illnesses and their symptoms.
Each line in the file has the form
Illness: Symptom, Symptom, Symptom, ...
Store data into symptomChecker map */
public void processDatafile()
{
// Step 1: read in a data filename from keybaord
// create a scanner for the file
// Step 2: process data lines in file scanner
// 2.1 for each line, split the line into a disease and symptoms
// make sure to trim() spaces and use toLowercase()
// 2.2 for symptoms, split into individual symptom
// create a scanner for symptoms
// useDelimeter(",") to split into individual symptoms
// make sure to trim() spaces and use toLowercase()
// for each symptom
// if it is already in the map, insert disease into related list
// if it is not already in the map, create a new list with the disease
// Step 3: display symptomChecker map
// implement here.....
} // end processDatafile
/* Read patient's symptoms in a line and adds them to the list.
Input format: Symptom, Symptom, Symptom,...
Shows diseases that match a given number of the symptoms. */
public void processSymptoms()
{
// Step 1: get all possible symptoms from assciatedIllnesses map
// and display them
// Step 2: process patient symptoms, add to patientSymptoms list
// read patient's symptoms in a line, separated by ','
// create a scanner for symptoms
// UseDelimeter(",") to split into individual symptoms
// make sure to trim() spaces and use toLowercase()
// display invalid/duplicate symptoms
// add valid symptoms to patientSymptoms list
// Step 3: display patientSymptoms list
// Step 4: process illnesses to frequency count
// create a map of disease name and frequency count
// for each symptom in patientSymptoms list
// get list of illnesses from symptomChecker map
// for each illness in the list
// if it is already in the map, increase counter by 1
// if it is not already in the map, create a new counter 1
// ** need to keep track of maximum counter numbers
// Step 5: display result
// for count i = 1 to maximum counter number
// display illness that has count i
// implement here.....
} // end processSymptoms
public static void main(String[] args)
{
PhysiciansHelper lookup = new PhysiciansHelper();
lookup.processDatafile();
lookup.processSymptoms();
} // end main
} // end PhysiciansHelper
Explanation / Answer
PhysicianHelper.java
import java.io.File;
import java.io.FileNotFoundException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Scanner;
import java.util.Set;
import java.util.TreeMap;
public class PhysiciansHelper
{
// symptom to illnesses map
private Map<String, List<String>> symptomChecker;
Scanner keyboard = new Scanner(System.in);
/* Constructor symptomChecker map using TreeMap */
public PhysiciansHelper()
{
// use TreeMap, i.e. sorted order keys
symptomChecker = new TreeMap<String, List<String>>();
} // end default constructor
/*
* Reads a text file of illnesses and their symptoms.
*
* Each line in the file has the form
*
* Illness: Symptom, Symptom, Symptom, ...
*
* Store data into symptomChecker map
*/
public void processDatafile()
{
// Step 1: read in a data filename from keybaord
System.out.println("Enter filename:");
String filename = keyboard.nextLine();
// create a scanner for the file
Scanner symtomsFile;
try {
symtomsFile = new Scanner(new File(filename));
// Step 2: process data lines in file scanner
while (symtomsFile.hasNextLine()) {
String line = symtomsFile.nextLine();
// 2.1 for each line, split the line into a disease and symptoms
String[] values = line.trim().toLowerCase().split(":");
String disease = values[0].trim();
ArrayList<String> symptoms = new ArrayList<String>();
// 2.2 for symptoms, split into individual symptom
// useDelimeter(",") to split into individual symptoms
// make sure to trim() spaces and use toLowercase() for each
// symptom
symptoms.addAll(Arrays.asList(values[1].trim().toLowerCase().split(",")));
// if it is already in the map, insert disease into related list
for (String symptom : symptoms) {
if (symptomChecker.containsKey(symptom.trim())) {
symptomChecker.get(symptom.trim()).add(disease);
} else {
// if it is not already in the map, create a new list
// with the disease
ArrayList<String> diseases = new ArrayList<String>();
diseases.add(disease);
symptomChecker.put(symptom.trim(), diseases);
}
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
}
// Step 3: display symptomChecker map
System.out.println("======================================================");
System.out.println("Contents of the Map: ");
for (Entry<String, List<String>> entry : symptomChecker.entrySet()) {
String key = entry.getKey().toString();
List<String> values = entry.getValue();
System.out.println(key + "=" + values);
}
} // end processDatafile
/*
* Read patient's symptoms in a line and adds them to the list.
*
* Input format: Symptom, Symptom, Symptom,...
*
* Shows diseases that match a given number of the symptoms.
*/
public void processSymptoms()
{
// Step 1: get all possible symptoms from assciatedIllnesses map and
// display them
System.out.println("======================================================");
System.out.println("The possible symptoms are:");
for (Entry<String, List<String>> entry : symptomChecker.entrySet()) {
String key = entry.getKey().toString();
System.out.println(key);
}
System.out.println("======================================================");
// Step 2: process patient symptoms, add to patientSymptoms list
System.out.println("Enter symptoms: ");
Set<String> possibleSymptoms = symptomChecker.keySet();
ArrayList<String> validSymptoms = new ArrayList<String>();
// read patient's symptoms in a line, separated by ','
// UseDelimeter(",") to split into individual symptoms
// make sure to trim() spaces and use toLowercase()
String[] symptomsEntered = keyboard.nextLine().trim().toLowerCase().split(",");
for (String symptom : symptomsEntered) {
// display invalid/duplicate symptoms
if (validSymptoms.contains(symptom)) {
System.out.println("=>duplicate " + symptom);
} else if (!possibleSymptoms.contains(symptom)) {
System.out.println("=>invalid " + symptom);
} else {
// add valid symptoms to patientSymptoms list
validSymptoms.add(symptom);
}
}
// Step 3: display patientSymptoms list
System.out.println("======================================================");
System.out.println("PatientSymptoms list: " + validSymptoms);
// Step 4: process illnesses to frequency count
System.out.println("Possible illnesses that match any symptom are:");
List<String> illnesses = new ArrayList<String>();
for (Entry<String, List<String>> entry : symptomChecker.entrySet()) {
String key = entry.getKey().toString();
List<String> values = entry.getValue();
for (String symptom : validSymptoms) {
if (key.equals(symptom)) {
illnesses.addAll(values);
}
}
}
// Step 4: process illnesses to frequency count
// create a map of disease name and frequency count
Map<Integer, String> illnessFreq =new TreeMap<Integer, String>();
for (String symptom : illnesses) {
int freq = Collections.frequency(illnesses, symptom);
illnessFreq.put(freq, symptom);
}
for (Entry<Integer, String> entry : illnessFreq.entrySet()) {
int key = entry.getKey();
String value = entry.getValue();
System.out.println("==> Disease(s) match "+key+" symptom(s)");
System.out.println(value);
}
keyboard.close();
} // end processSymptoms
public static void main(String[] args)
{
PhysiciansHelper lookup = new PhysiciansHelper();
lookup.processDatafile();
lookup.processSymptoms();
} // end main
} // end PhysiciansHelper
sample_data.txt
cold: runny nose, cough, sore throat
flu: runny nose, cough, sore throat, muscle aches, fever
mumps: high fever, rash, swelling
whooping cough: cough, rash, high fever
acid reflux: chest pain, burping
chickenpox: fever, blister
measles : runny nose, cough, fever, rash
norovirus : nausea, diarrhea, vomiting
ague: sweatiness, achy, high fever
Sample Output:
Enter filename:
D:workspaceTestsrcsample_data.txt
======================================================
Contents of the Map:
achy=[ague]
blister=[chickenpox]
burping=[acid reflux]
chest pain=[acid reflux]
cough=[cold, flu, whooping cough, measles]
diarrhea=[norovirus]
fever=[flu, chickenpox, measles]
high fever=[mumps, whooping cough, ague]
muscle aches=[flu]
nausea=[norovirus]
rash=[mumps, whooping cough, measles]
runny nose=[cold, flu, measles]
sore throat=[cold, flu]
sweatiness=[ague]
swelling=[mumps]
vomiting=[norovirus]
======================================================
The possible symptoms are:
achy
blister
burping
chest pain
cough
diarrhea
fever
high fever
muscle aches
nausea
rash
runny nose
sore throat
sweatiness
swelling
vomiting
======================================================
Enter symptoms:
cough,rash,cough,fever,blisterx,cough,runny NOSE
=>duplicate cough
=>invalid blisterx
=>duplicate cough
======================================================
PatientSymptoms list: [cough, rash, fever, runny nose]
Possible illnesses that match any symptom are:
==> Disease(s) match 1 symptom(s)
mumps
==> Disease(s) match 2 symptom(s)
cold
==> Disease(s) match 3 symptom(s)
flu
==> Disease(s) match 4 symptom(s)
measles
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