Java™ Application Development on Linux - Dator

162Chapter 5The Sun Microsystems Java Software <strong>Development</strong> Kit5.11.1.2 Putting a Compiled <strong>Application</strong> in a JAR FileLet’s assume we are going to manually put a Java application in a JAR file. Wewill want to specify the name of the class that contains the main() method ofthe application. First off, you want the JAR’s directory hierarchy to begin atthe folder that contains the first node of each package’s name. Our sample applicationhere is in the package net.multitool.Payback, so we want ourpresent working directory to be the one which contains the net subdirectory.Here’s a dump of the directory tree from that point after compilation of oursample application:$ find . -print../net./net/multitool./net/multitool/Payback./net/multitool/Payback/Account.class./net/multitool/Payback/Purchase.class./net/multitool/Payback/Cost.class./net/multitool/Payback/DebtAccount.class./net/multitool/Payback/Payback.class./net/multitool/Payback/SavingsAccount.class./net/multitool/util./net/multitool/util/SAMoney.class./net/multitool/util/SAMoneyTest$1.class./net/multitool/util/SAMoneyTest$2.class./net/multitool/util/SAMoneyTest.class$We now want to specify which class contains the application’s main()method. It happens to be the Payback class, so we create a file calledmanifest 28 with the following contents:$ cat manifestMain-Class: net.multitool.Payback.PaybackNext, we use the jar utility to create the JAR file:28. It can have any name. The key/value pairs from the file will be placed by the jar utility intothe standard manifest called META-INF/MANIFEST.MF no matter what name you give tothis file.