Assignment 1 & 2

assignment-01/Student.java

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+import java.util.Map;
+import java.util.Random;
+public class Student{
+    private String id;
+    private String firstName;
+    private String lastName;
+
+    private String email;
+    private int registerYear;
+    private String faculty;
+    private String departemen;
+    private String major;
+
+    public void setId(Map<String, String>facultyMap, Map<String, String>majorMap){
+    Random randoms = new Random();
+    this.id = facultyMap.get(faculty) + majorMap.get(major) + "1" + String.valueOf(registerYear).substring(2) + "1" + String.format("%03d", randoms.nextInt(061));
+    }
+    public String getId(){
+        return id;
+    }
+    public void setFirstName(String firstName){
+
+        this.firstName = firstName;
+    }
+    public void setLastName(String lastName){
+        this.lastName = lastName;
+    }
+    public String getFullName(){
+        String fullName[] = (firstName.toLowerCase() + " " + lastName.toLowerCase()).split(" ");
+        String Name = "";
+        for (int i = 0; i < fullName.length;i++) {
+            Name+= fullName[i].substring(0,1).toUpperCase()+ fullName[i].substring(1) + " ";
+        }
+        return Name;
+    }
+    public void setRegisterYear(Integer registerYear){
+        this.registerYear = registerYear;
+    }
+    public void setFaculty(String faculty){
+        this.faculty = faculty;
+    }
+    public String getFaculty(String faculty){
+        return faculty;
+    }
+    public void setDepartment(String departemen){
+        this.departemen = departemen;
+    }
+    public String getDepartment(String departemen){
+        return departemen;
+    }
+    public void setMajor(String major){
+        this.major = major;
+    }
+    public String getMajor(){
+        return major;
+    }
+    public void setEmail(Map<String, String>facultyMap){
+        String fullName[] = (firstName.toLowerCase() + " " + lastName.toLowerCase()).split(" ");
+        String Name = "";
+        for (int i = 0; i < fullName.length -1;i++) {
+            Name+= fullName[i].substring(0,1);
+        }
+        this.email = (fullName[fullName.length - 1]+ Name + String.valueOf(registerYear).substring(2) + facultyMap.get(faculty) + "@gmail.com").toLowerCase();
+    }
+    public String getEmail(String email){
+        return email;
+    }
+    public void description() {
+        System.out.println("Nama            : " + getFullName() );
+        System.out.println("NIM             : " + getId());
+        System.out.println("Email Mahasiswa : " + getEmail(email));
+        System.out.println("Fakultas        : " + getFaculty(faculty));
+        System.out.println("Departemen      : " + getDepartment(departemen));
+        System.out.println("Program Studi   : " + getMajor());
+        System.out.println();
+    }
+}

assignment-01/main.java

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+import java.util.*;
+public class main{
+    public static void main(String[] args) {
+        Map<String, String> facultyMap = new HashMap<>();
+        Map<String, String> majorMap = new HashMap<>();
+        facultyMap.put("Nama Fakultas Lain", "A");
+        facultyMap.put("Nama Fakultas Lain", "B");
+        facultyMap.put("Nama Fakultas Lain", "C");
+        facultyMap.put("Nama Fakultas Lain", "D");
+        facultyMap.put("Nama Fakultas Lain", "E");
+        facultyMap.put("Nama Fakultas Lain", "F");
+        facultyMap.put("Nama Fakultas Lain", "G");
+        facultyMap.put("MIPA", "H");
+        majorMap.put("Prodi Lain", "01");
+        majorMap.put("Prodi Lain", "02");
+        majorMap.put("Prodi Lain", "03");
+        majorMap.put("Prodi Lain", "04");
+        majorMap.put("Prodi Lain", "05");
+        majorMap.put("Prodi Lain", "06");
+        majorMap.put("Ilmu Komputer", "07");
+
+        Student student1 = new Student();
+        Student student2 = new Student();
+        Student student3 = new Student();
+
+        student1.setFirstName("mUHammAd");
+        student1.setLastName("fITRAH");
+        student1.setRegisterYear(2017);
+        student1.setFaculty("MIPA");
+        student1.setDepartment("Matematika");
+        student1.setMajor("Ilmu Komputer");
+        student1.setId(facultyMap, majorMap);
+        student1.setEmail(facultyMap);
+
+        student2.setFirstName("KENNEDY");
+        student2.setLastName("");
+        student2.setRegisterYear(2017);
+        student2.setFaculty("MIPA");
+        student2.setDepartment("Matematika");
+        student2.setMajor("Ilmu Komputer");
+        student2.setId(facultyMap, majorMap);
+        student2.setEmail(facultyMap);
+
+        student3.setFirstName("Khawaritzmi");
+        student3.setLastName("abdallah ahmad");
+        student3.setRegisterYear(2017);
+        student3.setFaculty("MIPA");
+        student3.setDepartment("Matematika");
+        student3.setMajor("Ilmu Komputer");
+        student3.setId(facultyMap, majorMap);
+        student3.setEmail(facultyMap);
+
+        student1.description();
+        student2.description();
+        student3.description();
+
+    }
+}

assignment-02/DataSource.java

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+import java.util.HashMap;
+import java.util.Map;
+import java.io.FileReader;
+import java.io.BufferedReader;
+
+
+public class DataSource {
+
+    private static DataSource dataSource;
+    private Map<String, User> userMap = new HashMap<>();
+    private Map<Integer, UserDetail> userDetailMap = new HashMap<>();
+
+    private DataSource() {
+        try{
+            putUserDetail();
+            putUser();
+        } catch(Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static DataSource getInstance() {
+        if(dataSource == null){
+            dataSource = new DataSource();
+        }
+        return dataSource;
+    }
+
+    private void putUserDetail() throws Exception{
+        // This Method Reads data from the UserDetail.txt file, then saves the data
+        // into UserDetailMap
+        BufferedReader br = new BufferedReader(new FileReader("UserDetail.txt"));
+        String data[];
+        while(br.ready()){
+            data = br.readLine().split(";");
+            //inputs user detail into user detail Map if the data starts with a valid id
+            if(isInteger(data[0])){
+                userDetailMap.put(Integer.valueOf(data[0]),
+                        new UserDetail(Integer.valueOf(data[0]), data[1], data[2], data[3]));
+
+            }
+        }
+        data = null;
+        br.close();
+    }
+
+    private void putUser() throws Exception{
+        // This Method Reads data from the User.txt file, then saves the data
+        // into UserMap
+        BufferedReader br = new BufferedReader(new FileReader("User.txt"));
+        String data[];
+        while(br.ready()){
+            data = br.readLine().split(";");
+            // inputs user into userMap if the data starts with a valid id
+            if(isInteger(data[0])){
+                userMap.put(data[1], new User(Integer.valueOf(data[0]), data[1], data[2],
+                        userDetailMap.get(Integer.valueOf(data[0]))));
+            }
+        } 
+        data = null;
+        br.close();
+    }
+
+    public User getUser(String key) {
+        return userMap.get(key);
+    }
+    public UserDetail getUserDetail(int key) {
+        return userDetailMap.get(key);
+    }
+
+    public static boolean isInteger(String s) {
+        //This method checks if a string is an integer
+        boolean isValidInteger = false;
+        try {
+            Integer.parseInt(s);
+            // s is a valid integer
+
+            isValidInteger = true;
+        } catch (NumberFormatException ex) {
+            // s is not an integer
+        }
+
+        return isValidInteger;
+    }
+
+}