Category: Categories of Modules
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Conditional Formatting 2 – Localization
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Output from the program: Click here to view code image Requested Locale: en_USArguments:[0.5] Result: There are no bananas.Arguments:[1.5] Result: There is only one banana.Arguments:[2.5, 2] Result: There are 2 bananas. Requested Locale: es_ESArguments:[0.5] Result: Ahí no hay plátanos.Arguments:[1.5] Result: Ahí es solo un plátano.Arguments:[2.5, 2] Result: Ahí son 2 plátanos.…
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Categories of Modules – Java Module System
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19.11 Categories of Modules The Java Module System is designed to allow both non-modular and modular code to work together. Types are usually bundled in JAR files. Regardless of whether it a plain JAR or a modular JAR, how its content is handled by the module system depends on the…
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Exploring Modules – Java Module System
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19.13 Exploring Modules This section provides an introduction to using the JDK tools to discover, explore, and analyze modular applications. Given the JARs main.jar, control.jar, view.jar, and model.jar for the adviceApp application in the mlib directory in Figure 19.14(c), p. 1188, we will use JDK tools to explore these archives…
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Module Graph of the JDK – Java Module System
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Module Graph of the JDK The modules in the JDK define dependencies on other modules. These dependencies can be viewed as a graph in which the modules are the nodes and the unidirectional edges between the nodes define the dependencies between the modules. A partial module graph of the JDK…
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Accessibility Rules for Members – Java Module System
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Accessibility Rules for Members Table 19.1 summarizes the accessibility rules for members of a public class A contained in a package pkg1 of module M. Note that class A is public so that it satisfies one of the three conditions discussed earlier for accessibility of a type from another module.…
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Better Performance – Java Module System
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Better Performance Modules in Java contribute to developing scalable systems with improved performance, as modules can be optimized independently. The module system guarantees that all classes of the same package are in the same module—that is, there are no split packages, and the modules describe explicit dependencies. The class loader…
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Creating the Source Files in the Exploded Modules – Java Module System
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Creating the Source Files in the Exploded Modules The classes that are in packages included in the modules are declared in their respective source files. Example 19.1 shows the source files for the adviceApp application. The source code of the AdviceModel.java file in the model module is shown at (1)…
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Parsing Values Using Patterns – Localization
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Parsing Values Using Patterns An instance of the MessageFormat class can be used both for formatting and for parsing of values. The class provides the parse() methods for parsing text. We will primarily use the one-argument method shown below to demonstrate parsing with the MessageFormat class. Click here to view…
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Creating JAR Files – Java Module System
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19.7 Creating JAR Files A JAR (Java Archive) file is a convenient way of bundling and deploying Java executable code and any other resources that are required (e.g., image or audio files). A JAR file is created by using the jar tool. The jar command has many options, akin to…
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Open Modules and the opens Directive – Java Module System
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19.8 Open Modules and the opens Directive Reflection is a powerful feature in Java that enables inspection and modification of runtime behavior of Java programs. The Reflection API is primarily in the java.lang.reflect package. Reference types (classes, interfaces, and enums) can be inspected at runtime to access information about the…