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Add code to count unique vehicles

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This commit is contained in:
DjBushido 2014-01-22 13:49:24 -05:00
parent 46b45f5cd3
commit ab678065fb
2 changed files with 54 additions and 3 deletions
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53
HW1/src/edu/uncc/itcs4180/PartTwo/PartTwo.java
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@ -1,12 +1,17 @@
package edu.uncc.itcs4180.PartTwo;
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
/* Assignment: Homework 1
* File name: PartOne.java
@ -21,6 +26,7 @@ public class PartTwo {
// Set up reading the actual data
String filename = "raw_data.csv";
String outputFilename = "distinct_vehicles.csv";
List<Vehicle> vehicles;
// Read in all of our data
@ -32,6 +38,7 @@ public class PartTwo {
while ((line = reader.readLine()) != null)
vehicles.add(readVehicle(line));
reader.close();
} catch (FileNotFoundException e) {
System.out.println("Could not open file: " + filename);
return;
@ -40,7 +47,43 @@ public class PartTwo {
return;
}
// If we've made it here, we have the final list of all our vehicles
// If we've made it here, we have the final list of all our vehicles,
// but we need to find just the unique ones.
Set<Vehicle> uniqueVehicles = new HashSet<Vehicle>(vehicles);
// Write the unique vehicles to another CSV file
try {
BufferedWriter writer = new BufferedWriter(new FileWriter(outputFilename));
for (Vehicle v : uniqueVehicles)
writer.write(v.toCSV() + "\n");
writer.close();
} catch (IOException e) {
System.err.println("Error writing unique vehicles to CSV");
// Don't return here, we can still complete the rest of the program
}
// Count the vehicles by modelYear and manufacturerName
Map<String, Integer> vehicleCount = new HashMap<String, Integer>();
for (Vehicle v : uniqueVehicles)
if (vehicleCount.containsKey(vehicleMapString(v)))
vehicleCount.put(vehicleMapString(v), vehicleCount.get(vehicleMapString(v)) + 1);
// Print out the results of our counting
// Convert to Set for iteration - http://stackoverflow.com/questions/1066589/java-iterate-through-hashmap
int counter = 1;
for (Map.Entry<String, Integer> v : vehicleCount.entrySet()) {
System.out.println(counter + "-" + v.getKey() + ":" + v.getValue());
counter++;
}
System.out.println("--------------------------------------------------" +
"------------------------------");
System.out.println("Total: " + (counter - 1));
System.out.println("--------------------------------------------------" +
"------------------------------");
// Now we need to sort our counting, and get the top 10 results.
}
private static Vehicle readVehicle(String line) {
@ -57,5 +100,9 @@ public class PartTwo {
return null;
}
}
private static String vehicleMapString(Vehicle v) {
return v.getModelName() + " - " + v.getManufacturerName();
}
}

4
HW1/src/edu/uncc/itcs4180/PartTwo/Vehicle.java
View File

@ -63,4 +63,8 @@ public class Vehicle {
this.noGears = noGears;
}
public String toCSV() {
return this.modelYear + this.manufacturerName + this.modelName +
this.horsePower + this.noCylinders + this.noGears;
}
}