Test review

app.java

@@ -0,0 +1,85 @@
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+class Student {
+    private String name;
+    private List<Double> scores;
+
+    public Student(String name, List<Double> scores) {
+        this.name = name;
+        this.scores = scores;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public double averageScore() {
+        if (scores.isEmpty()) {
+            return 0;
+        }
+        double sum = 0;
+        for (double score : scores) {
+            sum += score;
+        }
+        return sum / scores.size();
+    }
+}
+
+public class StudentReport {
+
+    public static List<Student> readStudentsFromCSV(String filePath) {
+        List<Student> students = new ArrayList<>();
+        try (BufferedReader br = new BufferedReader(new FileReader(filePath))) {
+            String line;
+            br.readLine();
+            while ((line = br.readLine()) != null) {
+                String[] data = line.split(",");
+                String name = data[0];
+                List<Double> scores = new ArrayList<>();
+                for (int i = 1; i < data.length; i++) {
+                    scores.add(Double.parseDouble(data[i]));
+                }
+                students.add(new Student(name, scores));
+            }
+        } catch (IOException e) {
+            System.err.println("Error reading file: " + e.getMessage());
+        }
+        return students;
+    }
+
+    public static List<String> generateReport(List<Student> students) {
+        List<String> reportLines = new ArrayList<>();
+        reportLines.add("Student Name, Average Score");
+        for (Student student : students) {
+            reportLines.add(student.getName() + ", " + String.format("%.2f", student.averageScore()));
+        }
+        return reportLines;
+    }
+
+    public static void saveReportToFile(List<String> reportLines, String outputFile) {
+        try (BufferedWriter bw = new BufferedWriter(new FileWriter(outputFile))) {
+            for (String line : reportLines) {
+                bw.write(line);
+                bw.newLine();
+            }
+            System.out.println("Report saved to " + outputFile);
+        } catch (IOException e) {
+            System.err.println("Error writing to file: " + e.getMessage());
+        }
+    }
+
+    public static void main(String[] args) {
+        String inputFile = "students_scores.csv";
+        String outputFile = "students_report.csv";
+
+        List<Student> students = readStudentsFromCSV(inputFile);
+        List<String> reportLines = generateReport(students);
+        saveReportToFile(reportLines, outputFile);
+    }
+}

code-opt.java

@@ -0,0 +1,29 @@
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class WordCounter {
+    public static void main(String[] args) {
+        List<String> words = new ArrayList<>();
+        words.add("apple");
+        words.add("banana");
+        words.add("apple");
+        words.add("orange");
+        words.add("banana");
+        words.add("banana");
+
+        Map<String, Integer> wordCount = new HashMap<>();
+        for (String word : words) {
+            int count = 0;
+            for (String w : words) {
+                if (w.equals(word)) {
+                    count++;
+                }
+            }
+            wordCount.put(word, count);
+        }
+
+        System.out.println(wordCount);
+    }
+}