From a5a99c28b1e5c3229cb6d2765a85c64bb35fdef6 Mon Sep 17 00:00:00 2001 From: Liesheng Long Date: Thu, 23 May 2019 20:09:03 -0400 Subject: [PATCH] formatting the source code --- .../HandleOptionalTypeExample.java | 64 +++++++++---------- .../OptionalToJsonExample.java | 25 ++++---- .../PersistOptionalTypeExample.java | 32 +++++----- .../PersistOptionalTypeExample2.java | 28 ++++---- .../PersistUserExample.java | 28 ++++---- .../SerializeOptionalTypeExample.java | 61 +++++++++--------- .../com/baeldung/optionalReturnType/User.java | 36 +++++------ .../optionalReturnType/UserOptional.java | 40 ++++++------ .../optionalReturnType/UserOptionalField.java | 34 +++++----- 9 files changed, 173 insertions(+), 175 deletions(-) diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/HandleOptionalTypeExample.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/HandleOptionalTypeExample.java index a49909901b..c472bab077 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/HandleOptionalTypeExample.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/HandleOptionalTypeExample.java @@ -5,37 +5,37 @@ import java.util.Map; import java.util.Optional; public class HandleOptionalTypeExample { - static Map usersByName = new HashMap(); - static { - User user1 = new User(); - user1.setUserId(1l); - user1.setFirstName("baeldung"); - usersByName.put("baeldung", user1); - } - - public static void main(String[] args) { - changeUserName("baeldung", "baeldung-new"); - changeUserName("user", "user-new"); - } - - public static void changeUserName(String oldFirstName, String newFirstName) { - Optional userOpt = findUserByName(oldFirstName); - if(userOpt.isPresent()){ - User user = userOpt.get(); - user.setFirstName(newFirstName); - - System.out.println("user with name "+oldFirstName+" is changed to "+ user.getFirstName()); - } else { - //user is missing - System.out.println("user with name "+oldFirstName+" is not found."); - } - } - - public static Optional findUserByName(String name){ - //look up the user in the database, the user object below could be null - User user=usersByName.get(name); - Optional opt = Optional.ofNullable(user); + static Map usersByName = new HashMap(); + static { + User user1 = new User(); + user1.setUserId(1l); + user1.setFirstName("baeldung"); + usersByName.put("baeldung", user1); + } - return opt; - } + public static void main(String[] args) { + changeUserName("baeldung", "baeldung-new"); + changeUserName("user", "user-new"); + } + + public static void changeUserName(String oldFirstName, String newFirstName) { + Optional userOpt = findUserByName(oldFirstName); + if (userOpt.isPresent()) { + User user = userOpt.get(); + user.setFirstName(newFirstName); + + System.out.println("user with name " + oldFirstName + " is changed to " + user.getFirstName()); + } else { + // user is missing + System.out.println("user with name " + oldFirstName + " is not found."); + } + } + + public static Optional findUserByName(String name) { + // look up the user in the database, the user object below could be null + User user = usersByName.get(name); + Optional opt = Optional.ofNullable(user); + + return opt; + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/OptionalToJsonExample.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/OptionalToJsonExample.java index cec5ba5ce1..b44a35fae1 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/OptionalToJsonExample.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/OptionalToJsonExample.java @@ -4,17 +4,16 @@ import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; public class OptionalToJsonExample { - public static void main(String[] args) { - UserOptional user = new UserOptional(); - user.setUserId(1l); - user.setFirstName("Bael Dung"); - - ObjectMapper om = new ObjectMapper(); - try { - System.out.print("user in json is:"+om.writeValueAsString(user)); - } catch (JsonProcessingException e) { - // TODO Auto-generated catch block - e.printStackTrace(); - } - } + public static void main(String[] args) { + UserOptional user = new UserOptional(); + user.setUserId(1l); + user.setFirstName("Bael Dung"); + + ObjectMapper om = new ObjectMapper(); + try { + System.out.print("user in json is:" + om.writeValueAsString(user)); + } catch (JsonProcessingException e) { + e.printStackTrace(); + } + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample.java index 681fae565b..85c96b9bc3 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample.java @@ -7,20 +7,20 @@ import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class PersistOptionalTypeExample { - static String persistenceUnit = "com.baeldung.optionalReturnType"; - static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); - - static EntityManager entityManager = emf.createEntityManager(); - - //to run this app, uncomment the follow line in META-INF/persistence.xml - //com.baeldung.optionalReturnType.UserOptionalField - public static void main(String[] args) { - UserOptionalField user1 = new UserOptionalField(); - user1.setUserId(1l); - user1.setFirstName(Optional.of("Bael Dung")); - entityManager.persist(user1); - - UserOptional user2 = entityManager.find(UserOptional.class, 1l); - System.out.print("User2.firstName:"+user2.getFirstName()); - } + static String persistenceUnit = "com.baeldung.optionalReturnType"; + static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); + + static EntityManager entityManager = emf.createEntityManager(); + + // to run this app, uncomment the follow line in META-INF/persistence.xml + // com.baeldung.optionalReturnType.UserOptionalField + public static void main(String[] args) { + UserOptionalField user1 = new UserOptionalField(); + user1.setUserId(1l); + user1.setFirstName(Optional.of("Bael Dung")); + entityManager.persist(user1); + + UserOptional user2 = entityManager.find(UserOptional.class, 1l); + System.out.print("User2.firstName:" + user2.getFirstName()); + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample2.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample2.java index 0662b692a8..3114e7cefb 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample2.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample2.java @@ -5,18 +5,18 @@ import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class PersistOptionalTypeExample2 { - static String persistenceUnit = "com.baeldung.optionalReturnType"; - static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); - - static EntityManager em = emf.createEntityManager(); - - public static void main(String[] args) { - UserOptional user1 = new UserOptional(); - user1.setUserId(1l); - user1.setFirstName("Bael Dung"); - em.persist(user1); - - UserOptional user2 = em.find(UserOptional.class, 1l); - System.out.print("User2.firstName:"+user2.getFirstName()); - } + static String persistenceUnit = "com.baeldung.optionalReturnType"; + static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); + + static EntityManager em = emf.createEntityManager(); + + public static void main(String[] args) { + UserOptional user1 = new UserOptional(); + user1.setUserId(1l); + user1.setFirstName("Bael Dung"); + em.persist(user1); + + UserOptional user2 = em.find(UserOptional.class, 1l); + System.out.print("User2.firstName:" + user2.getFirstName()); + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistUserExample.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistUserExample.java index af17f83c6e..f1284958e7 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistUserExample.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistUserExample.java @@ -5,18 +5,18 @@ import javax.persistence.EntityManagerFactory; import javax.persistence.Persistence; public class PersistUserExample { - static String persistenceUnit = "com.baeldung.optionalReturnType"; - static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); - - static EntityManager em = emf.createEntityManager(); - - public static void main(String[] args) { - User user1 = new User(); - user1.setUserId(1l); - user1.setFirstName("Bael Dung"); - em.persist(user1); - - User user2 = em.find(User.class, 1l); - System.out.print("User2.firstName:"+user2.getFirstName()); - } + static String persistenceUnit = "com.baeldung.optionalReturnType"; + static EntityManagerFactory emf = Persistence.createEntityManagerFactory(persistenceUnit); + + static EntityManager em = emf.createEntityManager(); + + public static void main(String[] args) { + User user1 = new User(); + user1.setUserId(1l); + user1.setFirstName("Bael Dung"); + em.persist(user1); + + User user2 = em.find(User.class, 1l); + System.out.print("User2.firstName:" + user2.getFirstName()); + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/SerializeOptionalTypeExample.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/SerializeOptionalTypeExample.java index 7ad4a5325e..d67337ad98 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/SerializeOptionalTypeExample.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/SerializeOptionalTypeExample.java @@ -6,37 +6,36 @@ import java.io.ObjectOutputStream; import java.util.Optional; public class SerializeOptionalTypeExample { - public static void main(String[] args) { - User user1 = new User(); - user1.setUserId(1l); - user1.setFirstName("baeldung"); - - serializeObject(user1, "user1.ser"); - + public static void main(String[] args) { + User user1 = new User(); + user1.setUserId(1l); + user1.setFirstName("baeldung"); - UserOptionalField user2 = new UserOptionalField(); - user2.setUserId(1l); - user2.setFirstName(Optional.of("baeldung")); - - serializeObject(user2, "user2.ser"); + serializeObject(user1, "user1.ser"); - } - - public static void serializeObject(Object object, String fileName) { - // Serialization - try { - FileOutputStream file = new FileOutputStream(fileName); - ObjectOutputStream out = new ObjectOutputStream(file); - - out.writeObject(object); - - out.close(); - file.close(); - - System.out.println("Object "+object.toString()+ " has been serialized to file "+fileName); - - } catch(IOException e) { - e.printStackTrace(); - } - } + UserOptionalField user2 = new UserOptionalField(); + user2.setUserId(1l); + user2.setFirstName(Optional.of("baeldung")); + + serializeObject(user2, "user2.ser"); + + } + + public static void serializeObject(Object object, String fileName) { + // Serialization + try { + FileOutputStream file = new FileOutputStream(fileName); + ObjectOutputStream out = new ObjectOutputStream(file); + + out.writeObject(object); + + out.close(); + file.close(); + + System.out.println("Object " + object.toString() + " has been serialized to file " + fileName); + + } catch (IOException e) { + e.printStackTrace(); + } + } } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/User.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/User.java index 42bedb4817..7aa11d78cb 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/User.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/User.java @@ -7,25 +7,25 @@ import javax.persistence.Id; @Entity public class User implements Serializable { - @Id - private long userId; - - private String firstName; - - public long getUserId() { - return userId; - } + @Id + private long userId; - public void setUserId(long userId) { - this.userId = userId; - } + private String firstName; - public String getFirstName() { - return firstName; - } + public long getUserId() { + return userId; + } + + public void setUserId(long userId) { + this.userId = userId; + } + + public String getFirstName() { + return firstName; + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + } - public void setFirstName(String firstName) { - this.firstName = firstName; - } - } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptional.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptional.java index c48781ea80..0138a84ab9 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptional.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptional.java @@ -9,27 +9,27 @@ import javax.persistence.Id; @Entity public class UserOptional implements Serializable { - @Id - private long userId; - - @Column(nullable = true) - private String firstName; - - public long getUserId() { - return userId; - } + @Id + private long userId; - public void setUserId(long userId) { - this.userId = userId; - } + @Column(nullable = true) + private String firstName; - public Optional getFirstName() { - return Optional.ofNullable(firstName); - } + public long getUserId() { + return userId; + } + + public void setUserId(long userId) { + this.userId = userId; + } + + public Optional getFirstName() { + return Optional.ofNullable(firstName); + } + + public void setFirstName(String firstName) { + this.firstName = firstName; + Optional.ofNullable(firstName); + } - public void setFirstName(String firstName) { - this.firstName = firstName; - Optional.ofNullable(firstName); - } - } diff --git a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptionalField.java b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptionalField.java index 0778a8bb99..c02430b1ba 100644 --- a/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptionalField.java +++ b/core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/UserOptionalField.java @@ -8,24 +8,24 @@ import javax.persistence.Id; @Entity public class UserOptionalField implements Serializable { - @Id - private long userId; - - private Optional firstName; - - public long getUserId() { - return userId; - } + @Id + private long userId; - public void setUserId(long userId) { - this.userId = userId; - } + private Optional firstName; - public Optional getFirstName() { - return firstName; - } + public long getUserId() { + return userId; + } - public void setFirstName(Optional firstName) { - this.firstName = firstName; - } + public void setUserId(long userId) { + this.userId = userId; + } + + public Optional getFirstName() { + return firstName; + } + + public void setFirstName(Optional firstName) { + this.firstName = firstName; + } }