WS07

.idea/.gitignore

@@ -0,0 +1,10 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Ignored default folder with query files
+/queries/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

.idea/compiler.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CompilerConfiguration">
+    <annotationProcessing>
+      <profile name="Maven default annotation processors profile" enabled="true">
+        <sourceOutputDir name="target/generated-sources/annotations" />
+        <sourceTestOutputDir name="target/generated-test-sources/test-annotations" />
+        <outputRelativeToContentRoot value="true" />
+        <module name="WS-07-Multithreading-Basics-and-Hashing" />
+      </profile>
+    </annotationProcessing>
+  </component>
+</project>

.idea/encodings.xml

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="Encoding">
+    <file url="file://$PROJECT_DIR$/src/main/java" charset="UTF-8" />
+    <file url="file://$PROJECT_DIR$/src/main/resources" charset="UTF-8" />
+  </component>
+</project>

.idea/jarRepositories.xml

@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RemoteRepositoriesConfiguration">
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Maven Central repository" />
+      <option name="url" value="https://repo1.maven.org/maven2" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="jboss.community" />
+      <option name="name" value="JBoss Community repository" />
+      <option name="url" value="https://repository.jboss.org/nexus/content/repositories/public/" />
+    </remote-repository>
+    <remote-repository>
+      <option name="id" value="central" />
+      <option name="name" value="Central Repository" />
+      <option name="url" value="https://mirror-maven.runflare.com/maven2" />
+    </remote-repository>
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="MavenProjectsManager">
+    <option name="originalFiles">
+      <list>
+        <option value="$PROJECT_DIR$/pom.xml" />
+      </list>
+    </option>
+  </component>
+  <component name="ProjectRootManager" version="2" project-jdk-name="23" project-jdk-type="JavaSDK" />
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

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 t1 = new StudentLoader(part1);
-
+                    StudentLoader t2 = new StudentLoader(part2);
-                    StudentLoader t2 = null;
+                    StudentLoader t3 = new StudentLoader(part3);
-
-                    StudentLoader t3 = null;
 
                     // TODO:
+                    t1.start();
+                    t2.start();
+                    t3.start();
 
-                    // start()
+                    t1.join();
+                    t2.join();
+                    t3.join();
 
-                    // join()
+                    manager.addStudents(t1.getStudents());
-
+                    manager.addStudents(t2.getStudents());
-                    // merge results
+                    manager.addStudents(t3.getStudents());
 
                 }
 

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

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;
     }
 

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);
+
         }
 
     }

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;
     }
-
 }

students.txt

@@ -1,60 +1,5 @@
-1001,Dimitri,Computer Science,3.7
+1001,Ali,Computer Science,3.7
 1002,Sara,Physics,3.9
 1003,John,Mathematics,3.5
 1004,Alice,Chemistry,3.2
 1005,David,Computer Science,3.8
-1006,Emma,Biology,3.6
-1007,Tom,Physics,3.1
-1008,Lina,Mathematics,4.0
-1009,Alex,Computer Science,3.4
-1010,Sophia,Chemistry,3.8
-1011,Daniel,Physics,3.2
-1012,Mary,Biology,3.9
-1013,Kevin,Computer Science,3.5
-1014,Nina,Mathematics,3.7
-1015,Jack,Chemistry,3.0
-1016,Olivia,Computer Science,3.9
-1017,Michael,Physics,3.3
-1018,Ethan,Mathematics,3.8
-1019,Grace,Biology,3.4
-1020,Lucas,Chemistry,3.6
-1021,Emily,Computer Science,4.0
-1022,Henry,Physics,3.5
-1023,Amelia,Mathematics,3.9
-1024,Benjamin,Biology,3.1
-1025,Charlotte,Chemistry,3.7
-1026,James,Computer Science,3.2
-1027,Abigail,Physics,3.8
-1028,William,Mathematics,3.4
-1029,Ella,Biology,3.9
-1030,Noah,Chemistry,3.3
-1031,Isabella,Computer Science,3.8
-1032,Logan,Physics,3.0
-1033,Mia,Mathematics,4.0
-1034,Mason,Biology,3.5
-1035,Ava,Chemistry,3.6
-1036,Elijah,Computer Science,3.7
-1037,Harper,Physics,3.4
-1038,Jacob,Mathematics,3.2
-1039,Evelyn,Biology,3.8
-1040,Alexander,Chemistry,3.1
-1041,Scarlett,Computer Science,3.9
-1042,Sebastian,Physics,3.6
-1043,Aria,Mathematics,3.5
-1044,Matthew,Biology,3.7
-1045,Chloe,Chemistry,4.0
-1046,Samuel,Computer Science,3.3
-1047,Victoria,Physics,3.8
-1048,Joseph,Mathematics,3.1
-1049,Lily,Biology,3.9
-1050,David,Chemistry,3.4
-1051,Hannah,Computer Science,3.8
-1052,Carter,Physics,3.5
-1053,Zoey,Mathematics,3.7
-1054,Owen,Biology,3.2
-1055,Penelope,Chemistry,3.9
-1056,Wyatt,Computer Science,4.0
-1057,Riley,Physics,3.3
-1058,Luke,Mathematics,3.6
-1059,Layla,Biology,3.4
-1060,Gabriel,Chemistry,3.8