Created
May 28, 2020 19:00
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Multi-threaded Code for generating time-complexity of elementary sorting algorithms
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import com.bma.algorithms.sort.elementary.Util; | |
import java.io.BufferedWriter; | |
import java.io.File; | |
import java.io.FileWriter; | |
import java.io.IOException; | |
import java.util.Collections; | |
import java.util.LinkedList; | |
import java.util.List; | |
import java.util.Random; | |
import static java.util.Arrays.copyOf; | |
public class SortingAlgorithmComparision { | |
private int maxInputArrSize; | |
public SortingAlgorithmComparision(int maxInputArrSize) { | |
this.maxInputArrSize = maxInputArrSize; | |
} | |
private List<String> compare(int totalRun) throws InterruptedException { | |
List<Thread> workerThreads = new LinkedList<>(); | |
List<String> stats = Collections.synchronizedList(new LinkedList<>()); | |
stats.add("Input Size,Quick,Merge,BottomUpMerge,Shell,Insertion,Selection" + System.lineSeparator()); | |
Random rand = new Random(); | |
for (int i = 0; i < totalRun; i++) { | |
int inputSize = rand.nextInt(maxInputArrSize); | |
int input[] = Util.generateUnsortedArray(inputSize); | |
Thread t = new Thread(() -> { | |
StringBuilder sb = new StringBuilder(); | |
sb.append(inputSize).append(",") | |
.append(Sort.quickSort(copyOf(input, input.length))).append("ms,") | |
.append(Sort.mergeSort(copyOf(input, input.length))).append("ms,") | |
.append(Sort.bottomUpMergeSort(copyOf(input, input.length))).append("ms,") | |
.append(Sort.shellSort(copyOf(input, input.length))).append("ms,") | |
.append(Sort.insertionSort(copyOf(input, input.length))).append("ms,") | |
.append(Sort.selectionSort(copyOf(input, input.length))).append("ms,") | |
.append(System.lineSeparator()); | |
stats.add(sb.toString()); | |
}); | |
t.start(); | |
Util.println(String.format("Thread<%d> started!", t.getId())); | |
workerThreads.add(t); | |
} | |
for (Thread workerThread : workerThreads) | |
workerThread.join(); | |
return stats; | |
} | |
public void generateReport(int totalRun, String outputFileName) throws IOException, InterruptedException { | |
try (BufferedWriter bw = new BufferedWriter(new FileWriter(new File(outputFileName)))) { | |
for (String line : compare(totalRun)) | |
bw.write(line); | |
} | |
} | |
} |
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