How to create executable jar in Java?
Following are the step for creating executable jar file in
java:
Step: Software environments:
JDK
Eclipse
Step: crate java
project in Eclipse
Open the Eclipse
File > New > Java Project
Enter the:
Project name: Jar-Creation-In-Java-TutorialByExample
Select the JRE
JavaSE-1.7
Click on the
Next
Finish.
Step: Add ExecutableJarCreationInJava.java
in Jar-Creation-In-Java-TutorialByExample
Right click on the src folder under Jar-Creation-In-Java-TutorialByExample
Click on the
New
Class
Enter the package name: com.tutorialbyexample
Enter the Name: ExecutableJarCreationInJava
Click on the Finish.
Step: ExecutableJarCreationInJava.java
package com.tutorialbyexample; /* * Main for for Executable Jar Creation In Java process */ public class ExecutableJarCreationInJava { public void getDetails(Object object) { printLn(object); } /* * private method for print info on console */ private void printLn(Object object) { System.out.println(object); } }
Step: Add MainApp.java
in Jar-Creation-In-Java-TutorialByExample
Right click on the src folder under Jar-Creation-In-Java-TutorialByExample
Click on the
New
Class
Enter the package name: com.tutorialbyexample
Enter the Name: MainApp
Click on the Finish.
Step: MainApp.java
package com.tutorialbyexample; /* * Main for for Executable Jar Creation In Java process */ public class MainApp { /* * main method for Main App */ public static void main(String[] args) { ExecutableJarCreationInJava objJarInJava =
new ExecutableJarCreationInJava(); objJarInJava
.getDetails("Jar file creation done in Java by Eclipse!!!"); } }
Step: Run it in Eclipse for simple output
Right click on the MainApp.java
Run As
Java Application
Console: Jar
file creation done in Java by Eclipse!!!
Step: Create the executable
jar file mainapp.jar in Eclipse
Right click on Jar-Creation-In-Java-TutorialByExample
Click on the Export
Type the Jar and Click on the Runnable JAR file from wizard
Click on the Next
Select project name under Lunch Configuration: Jar-Creation-In-Java-TutorialByExample
Export destination: C:\mainapp.jar
Let it be rest default setting
Click Finish.
mainapp.jar will create in C:\mainapp.jar.
Step: Directory
structure for mainapp.jar
If you have 7-zip, just right click on the mainapp.jar and extract it.
mainaap --com -- tutorialbyexample -- ExecutableJarCreationInJava.class -- MainApp.class --META-INF -- MANIFEST.MF
Step: MANIFEST.MF
file details
Manifest-Version: 1.0
Class-Path: .
Main-Class: com.tutorialbyexample.MainApp
Note: With help of this only jar file converted into
executable.
Step: Run the executable
jar mainapp.jar form command line.
Open the command prompt
Start > Type cmd and press Enter
Command prompt window will appear
Change the dir to c:\ as our mainapp.jar file are located
under this dir.
Type the command java and enter
c:\>java Usage: java [-options] class [args...] (to execute a class) or java [-options] -jar jarfile [args...] (to execute a jar file) where options include: -d32 use a 32-bit data model if available -d64 use a 64-bit data model if available -client to select the "client" VM -server to select the "server" VM -hotspot is a synonym for the "client" VM [deprecated] The default VM is client. -cp-classpath A ; separated list of directories, JAR archives, and ZIP archives to search for class files. -D = set a system property -verbose:[class|gc|jni] enable verbose output -version print product version and exit -version: require the specified version to run -showversion print product version and continue -jre-restrict-search | -no-jre-restrict-search include/exclude user private JREs in the version search -? -help print this help message -X print help on non-standard options -ea[: ...|: ] -enableassertions[: ...|: ] enable assertions with specified granularity -da[: ...|: ] -disableassertions[: ...|: ] disable assertions with specified granularity -esa | -enablesystemassertions enable system assertions -dsa | -disablesystemassertions disable system assertions -agentlib: [= ] load native agent library , e.g. -agentlib:hprof see also, -agentlib:jdwp=help and -agentlib:hprof=help -agentpath: [= ] load native agent library by full pathname -javaagent: [= ] load Java programming language agent, see java.lang.instrument -splash: show splash screen with specified image See http://www.oracle.com/technetwork/java/javase/documentation/index.html for more details.
Indicate that java home has been set if not then set the
java home.
Output:
c:\>java -jar mainapp.jar MainApp
Jar file creation done in Java by Eclipse!!!
Thanks for reading, please like and share!!!
Reference:
Java 1.7 by Oracle
Eclipse
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