The options in this page indicate the settings for the Java project properties.
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The build class path is a list of paths visible to the compiler when building the project.
Source folders are the root of packages containing .java files. The compiler will translate the contained files to .class files that will be written to the output location (see below). Resources existing in source folders are also copied to the output location unless the setting in the Compiler preference page (Window > Preferences > Java > Compiler > Other) specifies that the resource is filtered.
You can choose whether to use the project itself as source folder or to use folders in the project.
Option | Description |
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Create New Folder | Creates a new folder to contain source |
Add Existing Folders | Allows to add from a list of existing folders |
Edit | Allows to modify the currently selected source folder |
Remove | Removes the selected folders from the class path. This does not delete the folders nor their contents. |
In the Required projects on the build path list, you can add project dependencies by selecting other workbench projects to add to the build path for this new project. TheSelect All and Deselect All buttons can be used to add or remove all other projects to or from the build path.
Adding a required project indirectly adds all its classpath entries marked as 'exported'. Setting a classpath entry as exported is done in the Order and Export tab.
The projects selected here are automatically added to the referenced projects list. The referenced project list is used to determine the build order. A project is always build after all its referenced projects are built.
On this page, you can add libraries to the build path. You can add:
JAR files can also be added indirectly as class path variables.
By default, the library list contains an entry representing the Java runtime library. Typically this is a variable entry called JRE_LIB. This entry points to the JRE selected as the default JRE. The default JRE is configured in the Installed JREs preferences page (Window > Preferences > Java > Installed JREs)
Option | Description |
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Add JARs | Allows you to navigate the workbench hierarchy and select JAR files to add to the build path. |
Add External JARs | Allows you to navigate the file system (outside the workbench) and select JAR files to add to the build path. |
Add Variable | Allows you to add classpath variables to the build path. Classpath variables are an indirection to JARs with the benefit of avoiding local
file system paths in a classpath. This is needed when projects are shared in a team. Variables can be created and edited in the Classpath Variable preference page (Window > Preferences > Java > Classpath Variables) |
Advanced | Opens the Advanced selection dialog. The advanced selection dialog offers to add class folder and classpath containers. These options are described in the next section. |
Edit | Allows you to modify the currently selected library entry. |
Attach Source | Allows you to select a source JAR file to attach to the selected JAR file or classpath variable. |
Remove | Removes the selected element from the build path. This does not delete the resource. |
Option | Description |
---|---|
Create New Class Folder | Creates a new class folder for the build path. |
Add Existing Class Folders | Allows you to navigate the workbench hierarchy and select folders to serve as class containers on the build path. |
Add Container | Allows you add a classpath container. Classpath containers can stand for an arbitrary number of entries. Typical usages are the representation of a set of JRE entries. The JRE container is an alternative to the JRE_LIB classpath entry. |
In the Build classpath list, you can click the Up and Down buttons to move the selected path entry up or down in the build path order for this new project.
Checked list entries are marked as exported. Exported entries are visible to projects that require the project. Use the Select All and Deselect All to change the checked state of all entries. Source folders are always exported, and can not be deselected.
At the bottom of this page, the Build output folder field allows you to enter a path to a folder path where the compilation output for this project will reside. Use Browse to select an existing location from the current project. The default for this field is configured in the New Project preference page (Window > Preferences > Java > New Project).
Build classpath
Classpath variables
Working with build paths
Attaching source to variables
Attaching source to a JAR file
Frequently asked questions on JDT
Classpath Variables preferences
Java Build Path properties