Keytool: Project
· Project to invoke the the keytool program bundled with Sun's Java SDK. Allows to manipulate keystores.
the project includes a java api to inkove the program and also a maven plugin.
Download JD-GUI to open JAR file and explore Java source code file (.class .java)
Click menu "File → Open File..." or just drag-and-drop the JAR file in the JD-GUI window keytool-1.6.0.jar file.
Once you open a JAR file, all the java classes in the JAR file will be displayed.