Environment variables are key/value pairs in the form of strings. it is used by operating systems to pass configuration information to applications.In Java platform also we have environment variables.
How to Set Environment Variable in Windows? For Windows Vista
Right Click Computer ——->Go to Properties ——–>Click Advanced system settings ———-> Click Environmental variables
Goto System variables section ——–> Click New
variable name —–> PATH
Variable value ———> Java Installation location(for example C:Program FilesJavajdk1.6.0_12bin)
Here I listed some environment variables which will be useful if you are working in Java project.
| S.No | Package/API/Where | Environment Variable | Environment Variable Value |
| 1 | Java |
JAVA_HOME
|
Example C:Program FilesJavajdk1.6.0_12 |
| 2 | Apache axis2 | AXIS2_HOME | Example D:axis2-1.5.2-binaxis2-1.5.2 for more details check here |
| 3 | Java | PATH | Example C:Program FilesJavajdk1.6.0_12bin |
| 4 | Java | CLASSPATH | Example C:Program FilesJavajdk1.6.0_12bin |
| 5 | Oracle | ORACLE_HOME |
ORACLE_HOME=$ORACLE_BASE/product/11.2.0/dbhome_1 |
| Oracle | ORACLE_PATH | Example ORACLE_PATH=.:$ORACLE_BASE/dba_scripts/common/sql |
|
| 7 | Oracle | ORACLE_SID | Example: ORACLE_SID=racdb1 |
| 8 | Oracle | LD_LIBRARY_PATH | Example LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$ORACLE_HOME/lib |
| 9 | Oracle | SQLPATH | Example SQLPATH=.:$ORACLE_BASE/dba_scripts/common/sql |
| J2EE | J2EE_HOME | The location of J2EE SDK Installation | |
| 11 | ANT | ANT_HOME | The location of ant installation |