Google Java Style Guide Google Java Style Guide 1 Introduction This document serves as the complete definition of Google’s coding standards for source code in the Java™ Programming Language. A Java source case-sensitive name of the top-level class it contains (of which there is exactly one), plus the .java extension. 2.2 File encoding: UTF-8 Source files are encoded in UTF-8. 2.3 Special characters ) 4.3 One statement per line Each statement is followed by a line break. 4.4 Column limit: 100 Java code has a column limit of 100 characters. Except as noted below, any line that would exceed this

Java EE Product Provider Tool Provider Application Component Provider Application Assembler Deployer and System Administrator Sun GlassFish, Oracle BEA WebLogic, IBM WebSphere, JBOSS, Apache files in the Java EE Server. ︎ According to environment, modify and deploy configuration files, then manage Java EE system. ︎ Varify the conformance from structure of EAR files to Java EE standards standards. Component, JAR, WAR ——�A Java EE EAR �� ����������� ����� �� ������Applet��� Web���EJB

Annotations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143 1.12. Java-based Container Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163 Further Information About How Java-based Configuration Works Internally . . . . . . . . . . . . 165 1.12.5. Composing Java-based Configurations . . . . . . . . . . . . . . . . @Configuration Classes or @Bean Methods. . . . . . . . . . . . . . . . . . . . . . . . . 178 Combining Java and XML Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160 5.1.2. Java Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . annotations in Java 5 created opportunities (such as annotated REST controllers or unit tests), the addition of lambda expressions in Java 8 created opportunities for functional APIs in Java. This is a boon ReactiveX) that allow declarative composition of asynchronous logic. At the programming-model level, Java 8 enabled Spring WebFlux to offer functional web endpoints alongside annotated controllers. 1.1

Operators Grammar Notation Semicolons Syntax Lexical structure Java Interop Calling Java code from Kotlin Calling Kotlin from Java JavaScript Dynamic Type Calling JavaScript from Kotlin Calling Migration Guide Evolution Kotlin Evolution Stability of Different Components FAQ FAQ Comparison to Java Programming Language 226 228 229 236 240 250 250 250 254 254 255 255 259 259 266 266 allowing to write concise and expressive code while maintaining full compatibility with existing Java-based technology stacks and a smooth learning curve: Expressiveness: Kotlin's innovative language

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125 Java Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 192 1.11.13. Advanced Java Config . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . chapter covers Spring WebFlux. For baseline information and compatibility with Servlet container and Java EE version ranges, see the Spring Framework Wiki. 1.1. DispatcherServlet WebFlux Spring MVC, as

injection should make your code less dependent on the container than it would be with traditional Java EE development. The POJOs that make up your application should be testable in JUnit or TestNG tests example, JDBC DataSource instances get bound to the same JNDI names in test code as they do in a Java EE container, you can reuse both application code and configuration in testing scenarios without details. The following example shows a @ContextConfiguration annotation that refers to an XML file: Java @ContextConfiguration("/test-config.xml") ① class XmlApplicationContextTests { // class body

SimpleJdbcCall. . . . . . . . . . . . . . . . . . . . . . . . . 112 3.7. Modeling JDBC Operations as Java Objects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114 consistent programming model across different transaction APIs, such as Java Transaction API (JTA), JDBC, Hibernate, and the Java Persistence API (JPA). • Support for declarative transaction management common problems. 1.1. Advantages of the Spring Framework’s Transaction Support Model Traditionally, Java EE developers have had two choices for transaction management: global or local transactions, both

O1: Scala Dependency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.3.1.2 O2: Java gateway process exited before sending its port number . . . . . . . . . . . 22 1.3.2 Usage issues InaccessibleObjectException: Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not “opens java.lang” to unnamed module @4e4aea35 . . . . . . . . . . . . . . . 20:43 flink-shaded-zookeeper-3.5.9.jar # -rw-r--r-- 1 dianfu staff 15M 10 18 20:43 flink-table-api-java-uber-1.15.2.jar # -rw-r--r-- 1 dianfu staff 35M 10 18 20:43 flink-table-planner-loader-1.15.2.jar

O1: Scala Dependency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1.3.1.2 O2: Java gateway process exited before sending its port number . . . . . . . . . . . 22 1.3.2 Usage issues InaccessibleObjectException: Unable to make field private final byte[] java.lang.String.value accessible: module java.base does not “opens java.lang” to unnamed module @4e4aea35 . . . . . . . . . . . . . . . 20:43 flink-shaded-zookeeper-3.5.9.jar # -rw-r--r-- 1 dianfu staff 15M 10 18 20:43 flink-table-api-java-uber-1.15.2.jar # -rw-r--r-- 1 dianfu staff 35M 10 18 20:43 flink-table-planner-loader-1.15.2.jar