Day 2 Lab 1

SimonHGR · SimonHGR · commit 718843aea2de · 2021-09-09T09:40:44.000-06:00
diff --git a/src/main/java/superiterable/SILab.java b/src/main/java/superiterable/SILab.java
@@ -0,0 +1,68 @@
+package superiterable;
+
+import students.Student;
+
+import java.util.List;
+import java.util.Map;
+
+public class SILab {
+  private static final SuperIterable<Student> roster =
+      new SuperIterable<>(List.of(
+      students.Student.of("Fred", 3.4, "Math", "Physics"),
+      students.Student.of("Jim", 2.4, "Journalism"),
+      Student.of("Sheila", 3.9, "Math", "Physics", "Quantum Mechanics", "Astrophysics")
+  ));
+  private static final Map<String, Integer> courseLevel = Map.of(
+      "Physics", 100,
+      "Math", 200,
+      "Journalism", 300,
+      "Astrophysics", 300,
+      "Quantum Mechanics", 400
+      );
+
+  private static final Map<String, Integer> creditHours = Map.of(
+      "Physics", 4,
+      "Math", 3,
+      "Journalism", 4,
+      "Astrophysics", 3,
+      "Quantum Mechanics", 2
+      );
+
+  public static void main(String[] args) {
+    System.out.println("All students");
+    roster
+        // Add code HERE ONLY, so as to print
+        // "Student: <name> has gpa: <gpa>" for all students
+
+        .forEach(s -> System.out.println(s));
+
+    System.out.println("gpa below 3.5");
+    roster
+        // Add code HERE ONLY, so as to print
+        // "Student: <name> has gpa: <gpa>" for all students with gpa less than 3.5
+
+        .forEach(s -> System.out.println(s));
+
+    System.out.println("Takes more than 1 course");
+    roster
+        // Add code HERE ONLY, so as to print
+        // "Student: <name> takes <count> courses" for all students taking more than 1 course
+
+        .forEach(s -> System.out.println(s));
+
+    System.out.println("Studying advanced courses");
+    roster
+        // Add code HERE ONLY, so as to print
+        // "Student: <name> takes advanced courses" for all students taking a course at 300+ level
+
+        .forEach(s -> System.out.println(s));
+
+    System.out.println("Course load");
+    roster
+        // Add code HERE ONLY, so as to print
+        // "Student: <name> takes <total> credit hours" for all students
+
+        .forEach(s -> System.out.println(s));
+
+  }
+}
diff --git a/src/main/java/superiterable/Student.java b/src/main/java/superiterable/Student.java
@@ -0,0 +1,57 @@
+package superiterable;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+public class Student {
+  private String name;
+  private double gpa;
+  private List<String> courses;
+
+  private Student(String name, double gpa, List<String> courses) {
+    if (!isValidStudent(name, gpa)) throw new IllegalArgumentException();
+    this.name = name;
+    this.gpa = gpa;
+    this.courses = new ArrayList<>(courses);
+  }
+  private Student(String name, double gpa, String ... courses) {
+    if (!isValidStudent(name, gpa)) throw new IllegalArgumentException();
+    this.name = name;
+    this.gpa = gpa;
+    this.courses = List.of(courses);
+  }
+
+  public static boolean isValidStudent(String name, double gpa) {
+    return ((name != null) && (gpa >= 0 && gpa <= 4.0));
+  }
+  public static Student of(String name, double gpa, String ... courses) {
+    return new Student(name, gpa, courses);
+  }
+  public String getName() {
+    return name;
+  }
+  public double getGpa() {
+    return gpa;
+  }
+  public Student withGpa(double gpa) {
+    if (isValidStudent(this.name, gpa)) {
+      return new Student(this.name, gpa, this.courses);
+    } else {
+      throw new IllegalArgumentException("bad gpa");
+    }
+  }
+  public List<String> getCourses() {
+    return Collections.unmodifiableList(courses);
+  }
+
+  @Override
+  public String toString() {
+    return "Student{" +
+        "name='" + name + '\'' +
+        ", gpa=" + gpa +
+        ", courses=" + courses +
+        '}';
+  }
+}
