Standard Options filename Reads options and file names from a file. In the following lists of options, an argument of path represents a search path, composed of a list of file system locations separated by the platform path separator character, (semicolon on Windows, or colon : on other systems.) Depending on the option, the file system locations may be directories, JAR files or JMOD files. If the option begins with a double dash ( -), the argument may be separated either by whitespace or by an equals ( =) character with no additional whitespace. If the option begins with a single dash ( -) the argument should either directly follow the option name, or should be separated with a colon ( :) or whitespace, depending on the option. If an argument contains spaces or other whitespace characters, the value should be quoted according to the conventions of the environment being used to invoke javac. Javac provides standard options, and extra options that are either non-standard or are for advanced use. Javac supports Compiling for Earlier Releases Of The Platform and can also be invoked from Java code using one of a number of APIs Options Upgrading and patching modules in the compile-time environment.Processing annotations in source files and class files.Checking for problems in javadoc comments ( /**.Checking for stylistic issues in Java source code.Compiling code to run under a debugger.Compiling code to run on earlier releases of the JDK.However, it is recommended to specify a separate destination directory with the -d option.Ĭommand-line options and environment variables also control how javac performs various tasks: The options, which all have names ending in "path", are described in Standard Options, and further described in Configuring a Compilation and Searching for Module, Package and Type Declarations.īy default, javac compiles each source file to a class file in the same directory as the source file. If you have compiled those source files previously, you can use options to tell javac where to search for the corresponding class files. 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. This lets javac check that the code has the right to access those classes and interfaces. 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. Javac expects that source files are arranged in one or more directory hierarchies on the file system, described in Arrangement of Source Code.
javac will compile the files together, as a group, and will automatically resolve any dependencies between the declarations in the various source files. The order of source files specified on the command line or in an argument file is not important. See Standard Options for a description of the option and Command-Line Argument Files for a description of javac argument files. There are two ways to specify source files to javac:įor a small number of source files, you can list their file names on the command line.įor a large number of source files, you can use the filename option on the command line to specify an argument file that lists their file names. For example, a class called Shape would be declared in a source file called Shape.java, and compiled into a class file called Shape.class. Both source and class files normally have file names that identify the contents. Class files have a file name extension of. Source files must have a file name extension of. The javac command can also process annotations in Java source files and classes. 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. Sourcefiles-or-classnames Source files to be compiled (for example, Shape.java) or the names of previously compiled classes to be processed for annotations (for example, geometry.MyShape). Javac - read Java declarations and compile them into class files Synopsis Compiling for Earlier Releases of the Platform.Compilation Environment and Runtime Environment.Searching for the Declaration of a Type When the Reference is in a Module.Searching for the Declaration of a Type When the Reference is not in a Module.Searching for the Declaration of a Module.Searching for Module, Package and Type Declarations.Example of Specifying a User Class Path.Example of Compiling Multiple Source Files.Arrangement of Source Code for a Module.Arrangement of Source Code for a Package.Examples of Using javac Arrangement of Source Code.
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