Does Java have a using statement?

by

Java 7 introduced Automatic Resource Block Management which brings this feature to the Java platform. Prior versions of Java didn’t have anything resembling using.

As an example, you can use any variable implementing java.lang.AutoCloseable in the following way:

try(ClassImplementingAutoCloseable obj = new ClassImplementingAutoCloseable())
{
    ...
}

Java’s java.io.Closeable interface, implemented by streams, automagically extends AutoCloseable, so you can already use streams in a try block the same way you would use them in a C# using block. This is equivalent to C#’s using.

As of version 5.0, Hibernate Sessions implement AutoCloseable and can be auto-closed in ARM blocks. In previous versions of Hibernate Session did not implement AutoCloseable. So you’ll need to be on Hibernate >= 5.0 in order to use this feature.

More Related Contents:

  1. java.lang.ClassCastException: java.lang.String cannot be cast to
  2. Hibernate Unknown entity (I know it has been asked before…) [duplicate]
  3. JPA JoinColumn vs mappedBy
  4. Hibernate 5 :- org.hibernate.MappingException: Unknown entity
  5. Turning off hibernate logging console output
  6. What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association?
  7. The server time zone value ‘AEST’ is unrecognized or represents more than one time zone
  8. Difference between @OneToMany and @ElementCollection?
  9. Automatic reserved word escaping for Hibernate tables and columns
  10. What’s the use of session.flush() in Hibernate
  11. What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
  12. @GeneratedValue polymorphic abstract superclass over MySQL
  13. JPA/Hibernate Static Metamodel Attributes not Populated — NullPointerException
  14. JPA: Implementing Model Hierarchy – @MappedSuperclass vs. @Inheritance
  15. Hibernate Criteria Query to get specific columns
  16. Hibernate generates negative id values when using a sequence
  17. Hibernate HQL Query : How to set a Collection as a named parameter of a Query?
  18. Disable the log from specific class/jar via logback.xml
  19. How to prevent SQL Injection with JPA and Hibernate?
  20. How to escape reserved words in Hibernate’s HQL
  21. Specifying an Index (Non-Unique Key) Using JPA
  22. Hibernate: Create Mysql InnoDB tables instead of MyISAM
  23. IN-clause in HQL or Java Persistence Query Language
  24. How does Hibernate detect dirty state of an entity object?
  25. Persist collection of interface using Hibernate
  26. Configure hibernate to connect to database via JNDI Datasource
  27. What is the MariaDB dialect class name for Hibernate?
  28. compatibility of spring 4.0.0 with hibernate 4.30 [duplicate]
  29. Hibernate throws strange error: Class is not mapped
  30. Why HibernateTemplate isn’t recommended? [duplicate]

Leave a Comment