CSCI 355 Getting started in Java

Computer Science Department, Bucknell University

Getting Started in Java on Linux Workstations
CSCI 355 Distributed Systems Spring 2007
Professor Dan Hyde

Add to your .cshrc file in your home directory the following two items:
1. The following two lines to set the environment variable CLASSPATH.
```
### CLASSPATH - environment variable for JAVA
setenv CLASSPATH .:path1:path2
```
  where "path1" is the full path name of your directory where the java compiler is to look for java classes. Separate several paths with ":".
2. To use Java 2, (version 1.5.0) add BEFORE /bin to path variable the following:
```
/usr/local/jdk-1.5/bin
```
Note the file name MUST have the same name as the class in the file plus the .java extension!
For the below, the class name is "MyFile".
To compile a java application, you type
```
   % javac MyFile.java
```
which creates a file of Java byte code called MyFile.class.
To run a java application, you use the classname not the file name! In this case,
```
   % java MyFile
```
To check which version of Java
```
   % java -version
```

Page maintained by hyde at bucknell.edu Last update January 22, 2007