Such files should contain the names of any annotation processors to be used, listed one per line. varargs: Warns about the potentially unsafe vararg methods. Unless the module is another of the modules being compiled, javac will only look for compiled class files files. @Norm, yes, the book was trying to show how to use the -cp option but only provided an example with java and not javac. If … Warns about issues related to annotation processing. For previous releases, the Java SE API and the JDK API are as defined in that release. An argument file can include command-line options and source file names in any combination. module: Warns about the module system-related issues. When compiling code for multiple modules, the contents of the output directory will be organized in a module hierarchy, with the contents of each module in a separate subdirectory, each organized as a package hierarchy. Note: Classes found through the class path might be recompiled when their source files are also found. You can only specify one of these options: if you are not compiling code for a module, or if you are only compiling code for a single module, use the source path; if you are compiling code for multiple modules, use the module source path. For this purpose you can make use of option –d. This example compiles the Aloha.java, GutenTag.java, Hello.java, and Hi.java source files in the greetings package. It is a widely adopted convention that module names and package names begin with a lower-case letter, and that class names begin with an upper-case letter. When executing the javac command, pass in the path and name of each argument file with the at sign (@) leading character. When searching for a type that is referenced in code in a module, javac will examine the declaration of the enclosing module to determine if the type is in a package that is exported from another module that is readable by the enclosing module. The javac command reads source files that contain module, package and type declarations written in the Java programming language, and compiles them into class files that run on the Java Virtual Machine. This is similar to a module hierarchy, except that there may be intervening directories between the directory for the module and the directory that is the root of the package hierarchy for the source code of the module. Previously compiled files in the output directory. If the module contains package p.q.r, then the a.b.c directory contains the directory tree p\q\r (on Windows) or p/q/r (on other systems). When packages are organized into a module, the module is represented by one or more directories representing the packages in the module, one of which contains the module-info.java file. The javac command in Java compiles a program from a command prompt. Warns about finally clauses that cannot be completed normally, for example: The compiler generates a warning for the finally block in this example. divzero: Warns about the division by the constant integer 0. empty: Warns about an empty statement after if. Processing annotations in source files and class files. Overrides the location of the installed extensions. To compile a source file, javac needs to find the declaration of every class or interface that is used, extended, or implemented by the code in the source file. The valid versions are: 1.3, 1.4, 1.5 (or 5), 1.6 (or 6) and 1.7 (or 7). Specify source path directory. The class Y declared in package p.q is represented by the file Y.java in the q subdirectory of directory p. The class Z declared in package p.q.r is represented by the file Z.java in the r subdirectory of p\q (on Windows) or p/q (on other systems). This includes classes and interfaces not explicitly mentioned in the source file, but that provide information through inheritance. Compile a source file which depends on an external library: Compile a source file which depends on multiple libraries: The compiler will complain if the specified directory does not exist, and it won’t create one. If you specify -d C:\myclasses and the class is called com.mypackage.MyClass, then the class file is … Otherwise *.class files are saved to the directory where sources are. See Searching for Module, Package and Type Declarations. options: Warns about the issues relating to use of command line options. javac - read Java declarations and compile them into class files, javac [options] [sourcefiles-or-classnames]. You can either specify the locations for each module individually, or you can organize the source files so that you can specify the locations all together. Note that on some systems, javac doesn't au… For example, the following option checks classes and members (with all groups of checks) that have the access level of protected and higher (which includes protected and public): The following option enables all groups of checks for all access levels, except it will not check for HTML errors for classes and members that have the access level of package and higher (which includes package, protected and public): Supplies warnings to enable or disable, separated by comma. The first occurrence of a particular file shadows (hides) any subsequent occurrences of like-named files. javac -d classes src\net\codejava\StudentsInsert.java. If … Rather than specifying the source files of those classes and interfaces explicitly, you can use command-line options to tell javac where to search for their source files. Except when compiling multiple modules together, this is the source code path used to search for class or interface definitions. Unless annotation processing is disabled with the -proc:none option, the compiler searches for any annotation processors that are available. The directory, and any necessary subdirectories, will be created if they do not already exist. This option does not generate a package-info.class file if package-info.java contains only comments. For the current release, the Java SE API consists of the java. When searching for a type that is referenced in code that is not in a module, javac will look in the following places: The platform classes (or the types in exported packages of the platform modules) (This is for compiled class files only. Overrides the location of the endorsed standards path. By default, javac stores the .class files it generates in the same directory as the .java file that those classes were defined in. Enables or disables specific groups of checks. Such warnings cannot be suppressed with the @SuppressWarnings annotation. When classes and interfaces are organized into a package, the package is represented as a directory, and any subpackages are represented as subdirectories. This may be useful if you want to ensure that the code you are compiling is capable of running on a system with a limited set of modules installed.