WS07

src/main/java/dev/Main.java

@@ -37,27 +37,33 @@ public class Main {
 
                     // Split data into 3 parts
 
-                    List<String> part1 = null;
+                    int size = data.size();
+                    int chunk = (size + 2) / 3;
 
-                    List<String> part2 = null;
+                    List<String> part1 = data.subList(0, Math.min(chunk, size));
 
-                    List<String> part3 = null;
+                    List<String> part2 = data.subList(Math.min(chunk, size), Math.min(2 * chunk, size));
+
+                    List<String> part3 = data.subList(Math.min(2 * chunk, size), size);
 
                     // TODO:
 
-                    StudentLoader t1 = null;
-
-                    StudentLoader t2 = null;
-
-                    StudentLoader t3 = null;
+                    StudentLoader t1 = new StudentLoader(part1);
+                    StudentLoader t2 = new StudentLoader(part2);
+                    StudentLoader t3 = new StudentLoader(part3);
 
                     // TODO:
+                    t1.start();
+                    t2.start();
+                    t3.start();
 
-                    // start()
+                    t1.join();
+                    t2.join();
+                    t3.join();
 
-                    // join()
-
-                    // merge results
+                    manager.addStudents(t1.getStudents());
+                    manager.addStudents(t2.getStudents());
+                    manager.addStudents(t3.getStudents());
 
                 }
 
@@ -96,4 +102,4 @@ public class Main {
 
     }
 
-}
+}

src/main/java/dev/model/Student.java

@@ -47,7 +47,7 @@ public class Student {
         // Example:
         // return id % 97;
 
-        return 0;
+        return id % 97;
     }
 
     @Override
@@ -64,7 +64,9 @@ public class Student {
         // Step 3:
         // Compare IDs
 
-        return false;
+        if (obj == null) return false;
+        Student other = (Student) obj;
+        return this.id == other.id;
     }
 
     @Override
@@ -78,4 +80,4 @@ public class Student {
                 '}';
     }
 
-}
+}

src/main/java/dev/service/StudentManager.java

@@ -18,6 +18,8 @@ public class StudentManager {
         // Hint:
         // addAll()
 
+        students.addAll(newStudents);
+
     }
 
     public Student searchStudent(int id) {
@@ -28,6 +30,12 @@ public class StudentManager {
 
         // Compare IDs
 
+        for (Student student : students) {
+            if (student.getId() == id) {
+                return student;
+            }
+        }
+
         return null;
     }
 
@@ -39,6 +47,13 @@ public class StudentManager {
 
         // Remove student
 
+        for (Student student : students) {
+            if (student.getId() == id) {
+                students.remove(student);
+                return true;
+            }
+        }
+
         return false;
     }
 
@@ -52,4 +67,4 @@ public class StudentManager {
 
     }
 
-}
+}

src/main/java/dev/thread/StudentLoader.java

@@ -27,26 +27,30 @@ public class StudentLoader extends Thread {
 
         // TODO:
 
-        /*
-        Example line:
-
-        1001,Aryan,Computer Science,3.7
-         */
-
         for (String line : lines) {
 
             // TODO:
             // split line
+            String[] parts = line.split(",");
 
             // TODO:
             // read values
 
+            int id = Integer.parseInt(parts[0]);
+            String name = parts[1];
+            String major = parts[2];
+            double gpa = Double.parseDouble(parts[3]);
+
             // TODO:
             // create Student
 
+            Student student = new Student(id, name, major, gpa);
+
             // TODO:
             // add to students list
 
+            students.add(student);
+
         }
 
     }
@@ -56,4 +60,4 @@ public class StudentLoader extends Thread {
         return students;
     }
 
-}
+}

src/main/java/dev/utils/FileManager.java

@@ -19,14 +19,10 @@ public class FileManager {
         while ((line = reader.readLine()) != null) {
 
             // TODO:
-
             // Add line to list
-
+            lines.add(line);
         }
-
         reader.close();
-
         return lines;
     }
-
-}
+}