How to add .jar file to the Java Code

Question

I have a java code where I want to use Guava libraries CharMatcher function. I downloaded it, but can't able to add it to my existing code. Can anybody help me how to add that .jar file to the java code (step-by-step). I am using JDK 1.6. Thanks in advance.

I am using the following command:

enter image description here

And Used follwing code:

public class Test {

 public static void main(String[] args) {

try {

 String key = "hello";
 Multimap<String, Integer> myMap = HashMultimap.create();
 myMap.put(key, 1);
 myMap.put(key, 5000);
 System.out.println(myMap.get(key));

}

 catch (FileNotFoundException e) {
  System.out.println(e);
  } catch (Exception e) {
  System.out.println(e);
  }


}
}

I store Guava Library and Test.java in C:\Program Files\Java\jdk1.6.0_25\bin . Can anybody help me where is the problem because it is showing errors.

duplicate http://stackoverflow.com/questions/1064481/newbie-question-how-to-include-jar-files-when-compiling — scibuff, Mar 23 '12 at 14:03
Step-by-step instructions would obviously depend on what programming environment you're using: NetBeans, Eclipse, Notepad, BlueJay... what? — Ernest Friedman-Hill, Mar 23 '12 at 14:05
@ErnestFriedman-Hill Sorry, I am not using NetBeans, Eclipse etc. I am using Javac (JDk 1.6) to run it. — alessandro, Mar 23 '12 at 14:15
Well, then see the comment about this being a duplicate of http://stackoverflow.com/questions/1064481, because it is! — Ernest Friedman-Hill, Mar 23 '12 at 14:28
@ErnestFriedman-Hill I used that command but showing above described errors. — alessandro, Mar 23 '12 at 14:59
OK, now that we see that: this actually has nothing to do with the classpath or including the jar. The classes you're using are in the package `com.google.common.collect`. You have to do, for example, `import com.google.common.collect.HashMultimap;` at the top of your Java file. — Ernest Friedman-Hill, Mar 23 '12 at 17:06

Aleksandr Kravets · Accepted Answer · 2012-03-23T14:39:11.507

7

Suppose you are using Eclipse as IDE, here is the picture: enter image description here

EDIT: if you don't use any IDE, you just must use CLASSPATH variable:

javac -classpath path_to_your_jar/yourjar.jar your_code.java

'-classpath' or '-cp' switch gives you possibility to tell javac where your libraries are located. See link for further reference.

edited Mar 23 '12 at 14:39

answered Mar 23 '12 at 14:15

Aleksandr Kravets

5,750
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Sorry, I am not using NetBeans, Eclipse etc. I am using Javac (JDk 1.6) to run it. – alessandro Mar 23 '12 at 14:16
Thanks. I used that command but showing above described errors. – alessandro Mar 23 '12 at 14:59
@alessandro: Have you imported needed class (HashMultimap) in your .java file? If not, you want to write 'import com.google.common.collect.HashMultimap;' in the file begining. – Aleksandr Kravets Mar 23 '12 at 15:04
Sorry, I become crazy. :) Thanks. – alessandro Mar 23 '12 at 15:05

score 3 · Answer 2 · edited Mar 23 '12 at 15:35

3

If your just doing command line, you can either modify the classpath environment variable, or pass the -classpath argument on the command line:

Windows: set CLASSPATH=%CLASSPATH%;\guava\install\dir\guava.jar
*nix export CLASSPATH=$CLASSPATH:/guava/install/dir/guava.jar

OR

javac -classpath guava\install\dir\guava.jar ...
java -classpath guava\install\dir\guava.jar ...

edited Mar 23 '12 at 15:35

Grzegorz Rożniecki

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answered Mar 23 '12 at 14:26

Mike

3,186
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score 0 · Answer 3 · answered Mar 23 '12 at 14:10

0

Simply add it to your classpath:

Copy .jar in your project-folder
Refresh your project-explorer in eclipse (i hope you're using eclipse)
rightclick .jar
Buildpath -> add to build path

I hope this helps you, i'm not really sure if this is what you are asking for ;)

answered Mar 23 '12 at 14:10

Christian Flöter

3
2

Sorry, I am not using NetBeans, Eclipse etc. I am using Javac (JDk 1.6) to run it. – alessandro Mar 23 '12 at 14:15

How to add .jar file to the Java Code

3 Answers3