In Java™ 2 SDK (J2SDK), Standard Edition, version 1.2 and higher, the jarsigner tool signs JAR files and verifies signatures on signed JAR files.
The jarsigner tool accesses the keystore, which the keytool creates and manages, when it needs to find the private key for signing a JAR file. In J2SDK, the jarsigner and keytool tools replace the javakey tool. It is compatible with the jarsigner tool that is supplied by Sun Microsystems, Inc.
The jarsigner tool is available using the Qshell Interpreter.
For more information about the jarsigner tool, see the jarsigner tool by Sun Microsystems, Inc.