Reference no: EM13765501
For this Assignment, you will update an existing Java program using the NetBeans IDE. You will use the NetBeans Integrated Development Environment to make changes to an existing NetBeans Java Project. This existing program correctly sorts the data without using threads and contains a method(threadedSort) that you will update to sort the data using threads.
Other Requirements: import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
public class Sort {
* You are to implement this method. The method should invoke one or
* more threads to read and sort the data from the collection of Files.
* The method should return a sorted list of all of the String data
* contained in the files.
* @param files
* @return
* @throws IOException
public static String[] threadedSort(File[] files) throws IOException {
throw new java.lang.IllegalStateException("Method not implemented");
}
* Given an array of files, this method will return a sorted
* list of the String data contained in each of the files.
* @param files the files to be read
* @return the sorted data
* @throws IOException thrown if any errors occur reading the file
public static String[] sort(File[] files) throws IOException {
String[] sortedData = new String[0];
for (File file : files) {
String[] data = getData(file);
data = MergeSort.mergeSort(data);
sortedData = MergeSort.merge(sortedData, data);
}
return sortedData;
}
* This method will read in the string data from the specified
* file and return the data as an array of String objects.
* @param file the file containing the String data
* @return String array containing the String data
* @throws IOException thrown if any errors occur reading the file
*/
private static String[] getData(File file) throws IOException {
ArrayList<String> data = new ArrayList<String>();
BufferedReader in = new BufferedReader(new FileReader(file));
// Read the data from the file until the end of file is reached
while (true) {
String line = in.readLine();
if (line == null) {
// the end of file was reached
break;
}
else {
data.add(line);
}
}
//Close the input stream and return the data
in.close();
return data.toArray(new String[0]);
}
}