MacOSX Java JAR Archives and classpath

The JVM class loader can only find and use JAR archives that are listed in the classpath. There are several ways to add a JAR to the classpath:

  1. Copy the JAR to one of the directories listed in the CLASSPATH environment variable. To see the current value of the CLASSPATH environment variable, open a terminal and type:
    echo $CLASSPATH
    Another way of viewing the classpath is to run this Java code:
    String classpath = System.getProperty("java.class.path");
  2. Modify the CLASSPATH environment variable to also include the directory containing the JAR archive.

    In csh, the CLASSPATH environment variable is modified with the setenv command. The format is:

    setenv CLASSPATH path1:path2:...
    In sh, the CLASSPATH environment variable can be modified with these commands:
    CLASSPATH = path1:path2:...
    export CLASSPATH
  3. Set the classpath at runtime. There are several possible ways of doing this:
    1. Use the -classpath option:
      javac -classpath ".:/chilkatJava/chilkat.jar"
      java -classpath ".:/chilkatJava/chilkat.jar" Test
    2. Use the -Djava.class.path system property:
      javac -Djava.class.path=.:/chilkatJava/chilkat.jar
      java -Djava.class.path=.:/chilkatJava/chilkat.jar Test