CODEWITHSUNDEEP
java
EmiDemi
EmiDemi

Reputation: 61

Could not find the main class. Program will exit

I made a Java application with netbeans and i made a jar file of it (with Build project button)

The .jar file is running on my pc.I tried to run it on other pc (i have installed java jre) and i have the error message "Could not find the main class. Program will exit"

my main class is called login.class I opened the manifest.mf of jar file and it look's ok

Manifest-Version: 1.0
Ant-Version: Apache Ant 1.8.2
Created-By: 1.7.0_02-b13 (Oracle Corporation)
Class-Path: lib/mysql-connector-java-3.1.14-bin.jar lib/beansbinding-1
 .2.1.jar lib/jcalendar-1.4.1.v201109071408.jar lib/jgoodies-common-1.
 2.0.jar lib/jgoodies-looks-2.4.1.jar lib/junit-4.6.jar
X-COMMENT: Main-Class will be added automatically by build
Main-Class: login

Upvotes: 1

Views: 2746

Answers (1)

Andreas Dolk
Andreas Dolk

Reputation: 114767

(1) Check, if the application starts if you call it from a console:

java -jar myjar.jar

If that works (and you tried it with starting the application from an explorer window before), then it is most likely a configuration problem with windows (or whatever OS you use)

(2) inspect your jar file with any zip tool - it needs to contain a file login.class in the jars root directory.

(3) If you added the last line to your manifest manually: make sure that the manifest file ends with an empty line, otherwise, the last line will not be parsed.

Upvotes: 2

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