iSharkFly-Docs/java-tutorials
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

formatting the source code

Browse Source
This commit is contained in:
Liesheng Long 2019-05-23 20:09:03 -04:00
parent 2c9c96a811
commit a5a99c28b1
9 changed files with 173 additions and 175 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/HandleOptionalTypeExample.java
View File

@ -20,20 +20,20 @@ public class HandleOptionalTypeExample {
public static void changeUserName(String oldFirstName, String newFirstName) { public static void changeUserName(String oldFirstName, String newFirstName) {
Optional<User> userOpt = findUserByName(oldFirstName); Optional<User> userOpt = findUserByName(oldFirstName);
if(userOpt.isPresent()){ if (userOpt.isPresent()) {
User user = userOpt.get(); User user = userOpt.get();
user.setFirstName(newFirstName); user.setFirstName(newFirstName);
System.out.println("user with name "+oldFirstName+" is changed to "+ user.getFirstName()); System.out.println("user with name " + oldFirstName + " is changed to " + user.getFirstName());
} else { } else {
//user is missing // user is missing
System.out.println("user with name "+oldFirstName+" is not found."); System.out.println("user with name " + oldFirstName + " is not found.");
} }
} }
public static Optional<User> findUserByName(String name){ public static Optional<User> findUserByName(String name) {
//look up the user in the database, the user object below could be null // look up the user in the database, the user object below could be null
User user=usersByName.get(name); User user = usersByName.get(name);
Optional<User> opt = Optional.ofNullable(user); Optional<User> opt = Optional.ofNullable(user);
return opt; return opt;

3
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/OptionalToJsonExample.java
View File

@ -11,9 +11,8 @@ public class OptionalToJsonExample {
ObjectMapper om = new ObjectMapper(); ObjectMapper om = new ObjectMapper();
try { try {
System.out.print("user in json is:"+om.writeValueAsString(user)); System.out.print("user in json is:" + om.writeValueAsString(user));
} catch (JsonProcessingException e) { } catch (JsonProcessingException e) {
// TODO Auto-generated catch block
e.printStackTrace(); e.printStackTrace();
} }
} }

6
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample.java
View File

@ -12,8 +12,8 @@ public class PersistOptionalTypeExample {
static EntityManager entityManager = emf.createEntityManager(); static EntityManager entityManager = emf.createEntityManager();
//to run this app, uncomment the follow line in META-INF/persistence.xml // to run this app, uncomment the follow line in META-INF/persistence.xml
//<class>com.baeldung.optionalReturnType.UserOptionalField</class> // <class>com.baeldung.optionalReturnType.UserOptionalField</class>
public static void main(String[] args) { public static void main(String[] args) {
UserOptionalField user1 = new UserOptionalField(); UserOptionalField user1 = new UserOptionalField();
user1.setUserId(1l); user1.setUserId(1l);
@ -21,6 +21,6 @@ public class PersistOptionalTypeExample {
entityManager.persist(user1); entityManager.persist(user1);
UserOptional user2 = entityManager.find(UserOptional.class, 1l); UserOptional user2 = entityManager.find(UserOptional.class, 1l);
System.out.print("User2.firstName:"+user2.getFirstName()); System.out.print("User2.firstName:" + user2.getFirstName());
} }
} }

2
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistOptionalTypeExample2.java
View File

@ -17,6 +17,6 @@ public class PersistOptionalTypeExample2 {
em.persist(user1); em.persist(user1);
UserOptional user2 = em.find(UserOptional.class, 1l); UserOptional user2 = em.find(UserOptional.class, 1l);
System.out.print("User2.firstName:"+user2.getFirstName()); System.out.print("User2.firstName:" + user2.getFirstName());
} }
} }

2
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/PersistUserExample.java
View File

@ -17,6 +17,6 @@ public class PersistUserExample {
em.persist(user1); em.persist(user1);
User user2 = em.find(User.class, 1l); User user2 = em.find(User.class, 1l);
System.out.print("User2.firstName:"+user2.getFirstName()); System.out.print("User2.firstName:" + user2.getFirstName());
} }
} }

5
core-java-modules/core-java-8-2/src/main/java/com/baeldung/optionalReturnType/SerializeOptionalTypeExample.java
View File

@ -13,7 +13,6 @@ public class SerializeOptionalTypeExample {
serializeObject(user1, "user1.ser"); serializeObject(user1, "user1.ser");
UserOptionalField user2 = new UserOptionalField(); UserOptionalField user2 = new UserOptionalField();
user2.setUserId(1l); user2.setUserId(1l);
user2.setFirstName(Optional.of("baeldung")); user2.setFirstName(Optional.of("baeldung"));
@ -33,9 +32,9 @@ public class SerializeOptionalTypeExample {
out.close(); out.close();
file.close(); file.close();
System.out.println("Object "+object.toString()+ " has been serialized to file "+fileName); System.out.println("Object " + object.toString() + " has been serialized to file " + fileName);
} catch(IOException e) { } catch (IOException e) {
e.printStackTrace(); e.printStackTrace();
} }
} }