Eclipse How to build an executable jar with external jar

Question

I am trying to build an executable jar program which depends on external jar downloaded  In my project  I included them in the build path and can be run and debug within eclipse   When I tried to export it to a jar  I can run the program but I can t when I try to press a button which includes function calls and classes from the external jar  I have edited the environment variables  Windows XP  CLASSPATH to include paths of all the external jar  but it doesn t work   A point to note is that I got compile warnings while exporting my executable jar  but it doesn t show up any description about the warnings   Would someone kindly provide a thorough guide on how to include an external jar program using eclipse

User · Answer

Try the fat-jar extension  It will include all external jars inside the jar    Update url  http   kurucz-grafika de fatjar Homepage  http   fjep sourceforge net

User · Answer

How to include the jars of your project into your runnable jar  I m using Eclipse Version  3 7 2 running on Ubuntu 12 10   I ll also show you how to make the build xml so you can do the ant jar from command line and create your jar with other imported jars extracted into it  Basically you ask Eclipse to construct the build xml that imports your libraries into your jar for you   Fire up Eclipse and make a new Java project  make a new package  mypackage   add your main class  Runner  Put this code in there    Now include the mysql-connector-java-5 1 28-bin jar from Oracle which enables us to write Java to connect to the MySQL database   Do this by right clicking the project - gt  properties - gt  java build path - gt  Add External Jar - gt  pick mysql-connector-java-5 1 28-bin jar   Run the program within eclipse  it should run  and tell you that the username password is invalid which means Eclipse is properly configured with the jar   In Eclipse go to File - gt  Export - gt  Java - gt  Runnable Jar File   You will see this dialog   Make sure to set up the  save as ant script  checkbox   That is what makes it so you can use the commandline to do an ant jar later   Then go to the terminal and look at the ant script     So you see  I ran the jar and it didn t error out because it found the included mysql-connector-java-5 1 28-bin jar embedded inside Hello jar  Look inside Hello jar   vi Hello jar and you will see many references to com mysql jdbc stuff class To do ant jar on the commandline to do all this automatically  Rename buildant xml to build xml  and change the target name from create run jar to jar  Then  from within MyProject you type ant jar and boom   You ve got your jar inside MyProject   And you can invoke it using java -jar Hello jar and it all works

User · Answer

You can do this by writing a manifest for your jar  Have a look at the Class-Path header  Eclipse has an option for choosing your own manifest on export   The alternative is to add the dependency to the classpath at the time you invoke the application   win32  java exe -cp app jar dependency jar foo MyMainClass  nix   java -cp app jar dependency jar foo MyMainClass

User · Answer

look   java-jar-ignores-classpath-Workaround

User · Answer

Eclipse 3 5 has an option to package required libraries into the runnable jar  File -  Export    Choose runnable jar and click next  The runnable jar export window has a radio button where you can choose to package the required libraries into the jar

User · Answer

As a good practice you can use an Ant Script  Eclipse comes with it  to generate your JAR file  Inside this JAR you can have all dependent libs   You can even set the MANIFEST s Class-path header to point to files in your filesystem  it s not a good practice though   Ant build xml script example    lt project name  jar with libs  default  compile and build  basedir     gt   lt  -- this is used at compile time -- gt   lt path id  example-classpath  gt       lt pathelement location    root-dir     gt       lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt   lt  path gt    lt target name  compile and build  gt       lt  -- deletes previously created jar -- gt       lt delete file  test jar    gt        lt  -- compile your code and drop  class into  bin  directory -- gt       lt javac srcdir    basedir   destdir  bin  debug  true  deprecation  on  gt           lt  -- this is telling the compiler where are the dependencies -- gt           lt classpath refid  example-classpath    gt       lt  javac gt        lt  -- copy the JARs that you need to  bin  directory  -- gt       lt copy todir  bin  gt           lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt       lt  copy gt        lt  -- creates your jar with the contents inside  bin   now with your  class and  jar dependencies  -- gt       lt jar destfile  test jar  basedir  bin  duplicate  preserve  gt           lt manifest gt               lt  -- Who is building this jar  -- gt               lt attribute name  Built-By  value    user name     gt               lt  -- Information about the program itself -- gt               lt attribute name  Implementation-Vendor  value  ACME inc     gt               lt attribute name  Implementation-Title  value  GreatProduct    gt               lt attribute name  Implementation-Version  value  1 0 0beta2    gt               lt  -- this tells which class should run when executing your jar -- gt               lt attribute name  Main-class  value  ApplyXPath    gt           lt  manifest gt       lt  jar gt   lt  target gt

User · Answer

Eclipse 3 5 has an option to package required libraries into the runnable jar  File -  Export    Choose runnable jar and click next  The runnable jar export window has a radio button where you can choose to package the required libraries into the jar

User · Answer

As a good practice you can use an Ant Script  Eclipse comes with it  to generate your JAR file  Inside this JAR you can have all dependent libs   You can even set the MANIFEST s Class-path header to point to files in your filesystem  it s not a good practice though   Ant build xml script example    lt project name  jar with libs  default  compile and build  basedir     gt   lt  -- this is used at compile time -- gt   lt path id  example-classpath  gt       lt pathelement location    root-dir     gt       lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt   lt  path gt    lt target name  compile and build  gt       lt  -- deletes previously created jar -- gt       lt delete file  test jar    gt        lt  -- compile your code and drop  class into  bin  directory -- gt       lt javac srcdir    basedir   destdir  bin  debug  true  deprecation  on  gt           lt  -- this is telling the compiler where are the dependencies -- gt           lt classpath refid  example-classpath    gt       lt  javac gt        lt  -- copy the JARs that you need to  bin  directory  -- gt       lt copy todir  bin  gt           lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt       lt  copy gt        lt  -- creates your jar with the contents inside  bin   now with your  class and  jar dependencies  -- gt       lt jar destfile  test jar  basedir  bin  duplicate  preserve  gt           lt manifest gt               lt  -- Who is building this jar  -- gt               lt attribute name  Built-By  value    user name     gt               lt  -- Information about the program itself -- gt               lt attribute name  Implementation-Vendor  value  ACME inc     gt               lt attribute name  Implementation-Title  value  GreatProduct    gt               lt attribute name  Implementation-Version  value  1 0 0beta2    gt               lt  -- this tells which class should run when executing your jar -- gt               lt attribute name  Main-class  value  ApplyXPath    gt           lt  manifest gt       lt  jar gt   lt  target gt

User · Answer

Try the fat-jar extension  It will include all external jars inside the jar    Update url  http   kurucz-grafika de fatjar Homepage  http   fjep sourceforge net

User · Answer

Try the fat-jar extension  It will include all external jars inside the jar    Update url  http   kurucz-grafika de fatjar Homepage  http   fjep sourceforge net

User · Answer

As a good practice you can use an Ant Script  Eclipse comes with it  to generate your JAR file  Inside this JAR you can have all dependent libs   You can even set the MANIFEST s Class-path header to point to files in your filesystem  it s not a good practice though   Ant build xml script example    lt project name  jar with libs  default  compile and build  basedir     gt   lt  -- this is used at compile time -- gt   lt path id  example-classpath  gt       lt pathelement location    root-dir     gt       lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt   lt  path gt    lt target name  compile and build  gt       lt  -- deletes previously created jar -- gt       lt delete file  test jar    gt        lt  -- compile your code and drop  class into  bin  directory -- gt       lt javac srcdir    basedir   destdir  bin  debug  true  deprecation  on  gt           lt  -- this is telling the compiler where are the dependencies -- gt           lt classpath refid  example-classpath    gt       lt  javac gt        lt  -- copy the JARs that you need to  bin  directory  -- gt       lt copy todir  bin  gt           lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt       lt  copy gt        lt  -- creates your jar with the contents inside  bin   now with your  class and  jar dependencies  -- gt       lt jar destfile  test jar  basedir  bin  duplicate  preserve  gt           lt manifest gt               lt  -- Who is building this jar  -- gt               lt attribute name  Built-By  value    user name     gt               lt  -- Information about the program itself -- gt               lt attribute name  Implementation-Vendor  value  ACME inc     gt               lt attribute name  Implementation-Title  value  GreatProduct    gt               lt attribute name  Implementation-Version  value  1 0 0beta2    gt               lt  -- this tells which class should run when executing your jar -- gt               lt attribute name  Main-class  value  ApplyXPath    gt           lt  manifest gt       lt  jar gt   lt  target gt

User · Answer

Try the fat-jar extension  It will include all external jars inside the jar    Update url  http   kurucz-grafika de fatjar Homepage  http   fjep sourceforge net

User · Answer

As a good practice you can use an Ant Script  Eclipse comes with it  to generate your JAR file  Inside this JAR you can have all dependent libs   You can even set the MANIFEST s Class-path header to point to files in your filesystem  it s not a good practice though   Ant build xml script example    lt project name  jar with libs  default  compile and build  basedir     gt   lt  -- this is used at compile time -- gt   lt path id  example-classpath  gt       lt pathelement location    root-dir     gt       lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt   lt  path gt    lt target name  compile and build  gt       lt  -- deletes previously created jar -- gt       lt delete file  test jar    gt        lt  -- compile your code and drop  class into  bin  directory -- gt       lt javac srcdir    basedir   destdir  bin  debug  true  deprecation  on  gt           lt  -- this is telling the compiler where are the dependencies -- gt           lt classpath refid  example-classpath    gt       lt  javac gt        lt  -- copy the JARs that you need to  bin  directory  -- gt       lt copy todir  bin  gt           lt fileset dir  D  LIC xalan-j 2 7 1  includes    jar    gt       lt  copy gt        lt  -- creates your jar with the contents inside  bin   now with your  class and  jar dependencies  -- gt       lt jar destfile  test jar  basedir  bin  duplicate  preserve  gt           lt manifest gt               lt  -- Who is building this jar  -- gt               lt attribute name  Built-By  value    user name     gt               lt  -- Information about the program itself -- gt               lt attribute name  Implementation-Vendor  value  ACME inc     gt               lt attribute name  Implementation-Title  value  GreatProduct    gt               lt attribute name  Implementation-Version  value  1 0 0beta2    gt               lt  -- this tells which class should run when executing your jar -- gt               lt attribute name  Main-class  value  ApplyXPath    gt           lt  manifest gt       lt  jar gt   lt  target gt

User · Answer

look   java-jar-ignores-classpath-Workaround

User · Answer

You can do this by writing a manifest for your jar  Have a look at the Class-Path header  Eclipse has an option for choosing your own manifest on export   The alternative is to add the dependency to the classpath at the time you invoke the application   win32  java exe -cp app jar dependency jar foo MyMainClass  nix   java -cp app jar dependency jar foo MyMainClass

User · Answer

How to include the jars of your project into your runnable jar  I m using Eclipse Version  3 7 2 running on Ubuntu 12 10   I ll also show you how to make the build xml so you can do the ant jar from command line and create your jar with other imported jars extracted into it  Basically you ask Eclipse to construct the build xml that imports your libraries into your jar for you   Fire up Eclipse and make a new Java project  make a new package  mypackage   add your main class  Runner  Put this code in there    Now include the mysql-connector-java-5 1 28-bin jar from Oracle which enables us to write Java to connect to the MySQL database   Do this by right clicking the project - gt  properties - gt  java build path - gt  Add External Jar - gt  pick mysql-connector-java-5 1 28-bin jar   Run the program within eclipse  it should run  and tell you that the username password is invalid which means Eclipse is properly configured with the jar   In Eclipse go to File - gt  Export - gt  Java - gt  Runnable Jar File   You will see this dialog   Make sure to set up the  save as ant script  checkbox   That is what makes it so you can use the commandline to do an ant jar later   Then go to the terminal and look at the ant script     So you see  I ran the jar and it didn t error out because it found the included mysql-connector-java-5 1 28-bin jar embedded inside Hello jar  Look inside Hello jar   vi Hello jar and you will see many references to com mysql jdbc stuff class To do ant jar on the commandline to do all this automatically  Rename buildant xml to build xml  and change the target name from create run jar to jar  Then  from within MyProject you type ant jar and boom   You ve got your jar inside MyProject   And you can invoke it using java -jar Hello jar and it all works

User · Answer

You can do this by writing a manifest for your jar  Have a look at the Class-Path header  Eclipse has an option for choosing your own manifest on export   The alternative is to add the dependency to the classpath at the time you invoke the application   win32  java exe -cp app jar dependency jar foo MyMainClass  nix   java -cp app jar dependency jar foo MyMainClass

User · Answer

You can do this by writing a manifest for your jar  Have a look at the Class-Path header  Eclipse has an option for choosing your own manifest on export   The alternative is to add the dependency to the classpath at the time you invoke the application   win32  java exe -cp app jar dependency jar foo MyMainClass  nix   java -cp app jar dependency jar foo MyMainClass

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