diff --git a/me/day05/practice/AuthMethod.java b/me/day05/practice/AuthMethod.java
new file mode 100644
index 0000000..874b313
--- /dev/null
+++ b/me/day05/practice/AuthMethod.java
@@ -0,0 +1,5 @@
+package me.day05.practice;
+
+public enum AuthMethod {
+ FINGERPRINT_AUTHENTICATION, PATTERN_AUTHENTICATION, PIN_AUTHENTICATION, FACIAL_AUTHENTICATION
+}
diff --git a/me/day05/practice/Company.java b/me/day05/practice/Company.java
new file mode 100644
index 0000000..eaf295f
--- /dev/null
+++ b/me/day05/practice/Company.java
@@ -0,0 +1,5 @@
+package me.day05.practice;
+
+public enum Company {
+ SAMSUNG, LG, APPLE
+}
diff --git a/me/day05/practice/Electronic.java b/me/day05/practice/Electronic.java
new file mode 100644
index 0000000..bcb9b20
--- /dev/null
+++ b/me/day05/practice/Electronic.java
@@ -0,0 +1,95 @@
+package me.day05.practice;
+
+import java.time.LocalDate;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.Objects;
+
+public class Electronic {
+ private static Long registerNo;
+ private String productNo;
+ private String modelName;
+ private Company companyName;
+ private LocalDate dateOfMade;
+ private AuthMethod[] authMethods;
+
+ public Electronic() {
+ if (registerNo == null) {
+ registerNo = 0L;
+ }
+ this.productNo = LocalDate.now().format(DateTimeFormatter.ofPattern("YYMMdd"))
+ + (String.format("%04d", ++registerNo));
+ }
+
+ public static Long getRegisterNo() {
+ return registerNo;
+ }
+
+ public String getProductNo() {
+ return productNo;
+ }
+
+ public void setProductNo(String productNo) {
+ this.productNo = productNo;
+ }
+
+ public String getModelName() {
+ return modelName;
+ }
+
+ public void setModelName(String modelName) {
+ this.modelName = modelName;
+ }
+
+ public Company getCompanyName() {
+ return companyName;
+ }
+
+ public void setCompanyName(Company companyName) {
+ this.companyName = companyName;
+ }
+
+ public LocalDate getDateOfMade() {
+ return dateOfMade;
+ }
+
+ public void setDateOfMade(LocalDate dateOfMade) {
+ this.dateOfMade = dateOfMade;
+ }
+
+ public AuthMethod[] getAuthMethods() {
+ return authMethods;
+ }
+
+ public void setAuthMethods(AuthMethod[] authMethods) {
+ this.authMethods = authMethods;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o)
+ return true;
+ if (o == null || getClass() != o.getClass())
+ return false;
+ Electronic that = (Electronic)o;
+ return productNo.equals(that.productNo) && Objects.equals(modelName, that.modelName)
+ && companyName == that.companyName && Objects.equals(dateOfMade, that.dateOfMade)
+ && Arrays.equals(authMethods, that.authMethods);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(productNo);
+ }
+
+ @Override
+ public String toString() {
+ return "Electronic{" +
+ "productNo='" + productNo + '\'' +
+ ", modelName='" + modelName + '\'' +
+ ", companyName=" + companyName +
+ ", dateOfMade=" + dateOfMade +
+ ", authMethods=" + Arrays.toString(authMethods) +
+ '}';
+ }
+}
diff --git a/me/day05/practice/Electronics.java b/me/day05/practice/Electronics.java
new file mode 100644
index 0000000..cfb6971
--- /dev/null
+++ b/me/day05/practice/Electronics.java
@@ -0,0 +1,48 @@
+package me.day05.practice;
+
+import java.util.Arrays;
+
+public class Electronics {
+ private static Electronics electronics;
+ private Electronic[] electronicList;
+
+ private Electronics() {
+
+ }
+
+ public static Electronics getInstance() {
+ if (electronics == null) {
+ electronics = new Electronics();
+ }
+ return Electronics.electronics;
+ }
+
+ public Electronic findByProductNo(String productNo) {
+ return Arrays.stream(this.electronicList)
+ .filter(electronic -> electronic.getProductNo().equals(productNo))
+ .findFirst()
+ .orElse(null);
+ }
+
+ Electronic[] groupByCompany(Company company) {
+ return Arrays.stream(this.electronicList)
+ .filter(electronic -> electronic.getCompanyName().equals(company))
+ .toArray(Electronic[]::new);
+ }
+
+ Electronic[] groupByAuthMethod(AuthMethod authMethod) {
+ return Arrays.stream(this.electronicList)
+ .filter(
+ electronic -> Arrays.stream(electronic.getAuthMethods())
+ .anyMatch(authMethods -> authMethods.equals(authMethod))
+ ).toArray(Electronic[]::new);
+ }
+
+ public Electronic[] getElectronicList() {
+ return electronicList;
+ }
+
+ public void setElectronicList(Electronic[] electronicList) {
+ this.electronicList = electronicList;
+ }
+}
diff --git a/me/day05/practice/User.java b/me/day05/practice/User.java
new file mode 100644
index 0000000..e7709ab
--- /dev/null
+++ b/me/day05/practice/User.java
@@ -0,0 +1,109 @@
+package me.day05.practice;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.util.Arrays;
+import java.util.Objects;
+
+public class User implements Cloneable {
+ private String userId;
+ private String userPassword;
+ private String userPhoneNumber;
+ private String email;
+ private LocalDate userBirthDate;
+ private Electronic[] electronicDevices;
+ private LocalDateTime registerTime;
+
+ public User() {
+ this.registerTime = LocalDateTime.now();
+ }
+
+ public String getUserId() {
+ return userId;
+ }
+
+ public void setUserId(String userId) {
+ this.userId = userId;
+ }
+
+ public String getUserPassword() {
+ return userPassword;
+ }
+
+ public void setUserPassword(String userPassword) {
+ this.userPassword = userPassword;
+ }
+
+ public String getUserPhoneNumber() {
+ return userPhoneNumber;
+ }
+
+ public void setUserPhoneNumber(String userPhoneNumber) {
+ this.userPhoneNumber = userPhoneNumber;
+ }
+
+ public String getEmail() {
+ return email;
+ }
+
+ public void setEmail(String email) {
+ this.email = email;
+ }
+
+ public LocalDate getUserBirthDate() {
+ return userBirthDate;
+ }
+
+ public void setUserBirthDate(LocalDate userBirthDate) {
+ this.userBirthDate = userBirthDate;
+ }
+
+ public Electronic[] getElectronicDevices() {
+ return electronicDevices;
+ }
+
+ public void setElectronicDevices(Electronic[] electronicDevices) {
+ this.electronicDevices = electronicDevices;
+ }
+
+ public LocalDateTime getRegisterTime() {
+ return registerTime;
+ }
+
+ public void setRegisterTime(LocalDateTime registerTime) {
+ this.registerTime = registerTime;
+ }
+
+ @Override
+ public boolean equals(Object o) {
+ if (this == o)
+ return true;
+ if (o == null || getClass() != o.getClass())
+ return false;
+ User user = (User)o;
+ return userId.equals(user.userId);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(userId);
+ }
+
+ @Override
+ protected Object clone() throws CloneNotSupportedException {
+ return super.clone();
+ }
+
+ @Override
+ public String toString() {
+ return "User{" +
+ "userId='" + userId + '\'' +
+ ", userPassword='" + userPassword + '\'' +
+ ", userPhoneNumber='" + userPhoneNumber + '\'' +
+ ", email='" + email + '\'' +
+ ", userBirthDate=" + userBirthDate +
+ ", electronicDevices=" + Arrays.toString(electronicDevices) +
+ ", registerTime=" + registerTime +
+ '}';
+ }
+}
diff --git a/me/day05/practice/Users.java b/me/day05/practice/Users.java
new file mode 100644
index 0000000..487f485
--- /dev/null
+++ b/me/day05/practice/Users.java
@@ -0,0 +1,46 @@
+package me.day05.practice;
+
+import java.util.Arrays;
+
+import me.day05.practice.exception.DuplicateUserException;
+
+public class Users {
+ private static final int DEFAULT_CAPACITY = 20;
+ private static Users users;
+ private User[] userList;
+
+ private Users() {
+ userList = new User[DEFAULT_CAPACITY];
+ }
+
+ public static Users getInstance() {
+ if (users == null) {
+ Users.users = new Users();
+ }
+ return Users.users;
+ }
+
+ public User findByUserId(String userId) {
+ return Arrays.stream(this.userList)
+ .filter((user -> user.getUserId().equals(userId)))
+ .findFirst()
+ .orElse(null);
+ }
+
+ public User copy(User user) throws CloneNotSupportedException {
+ return (User)(user.clone());
+ }
+
+ public User[] getUserList() {
+ return userList;
+ }
+
+ public void setUserList(User[] userList) {
+ this.userList = userList;
+ }
+
+ private boolean isDuplicateUser(User user) {
+ return Arrays.stream(this.userList)
+ .anyMatch(users -> users.getUserId().equals(user.getUserId()));
+ }
+}