UnsupportedClassVersionError: org/apache/poi/hssf/usermodel/HSSFWorkbook (Unsupported major.minor ve

Hello All,

My code is

IPortalComponentRequest componentRequest = (IPortalComponentRequest) this.getRequest();
String strPublicResourcePath = componentRequest.getPublicResourcePath() + "\\resources\\DefaultCurrency.xls" ;
InputStream fs = new FileInputStream(strPublicResourcePath);
HSSFWorkbook wb;
if(fs != null){
wb = new HSSFWorkbook(fs); //<<== Runtime Exception
}

Result :

Compilation is successful

Runtime Exception:

at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)
Caused by: java.lang.UnsupportedClassVersionError: org/apache/poi/hssf/usermodel/HSSFWorkbook (Unsupported major.minor version 49.0)
at java.lang.ClassLoader.defineClass0(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:540)
at com.sapportals.portal.prt.util.AutoClassLoader.findClassInternal(AutoClassLoader.java:880)
at com.sapportals.portal.prt.util.AutoClassLoader.loadClassLocally(AutoClassLoader.java:1250)
at com.sapportals.portal.prt.util.AutoClassLoader.loadClass(AutoClassLoader.java:1388)
at com.sapportals.portal.prt.util.AutoClassLoader.loadClass(AutoClassLoader.java:1357)
at com.sapportals.portal.prt.util.AutoClassLoader$2.run(AutoClassLoader.java:1465)
at java.security.AccessController.doPrivileged(Native Method)

JAR files :

poi-2.5.1.jar
poi-contrib-2.5.1-final-20040804.jar
poi-scratchpad-2.5.1-final-20040804.jar

JDK Compiler Compliance level : 1.4

Server Version : 1.4.2_32-b03

It is the IDE problem or JVM problem or code problem.
Please let me know. Thanks a Lot.

The UnsupportedClassVersionError happens when you compile a Java application with a more recent version fo the JDK than what you are running with. For example if you compile with JDK 6 and then try to run with JDK 5. In your case, it looks like you are using JDK 1.4 while the Apache JAR you are using was compiled with 1.5. You need to upgrade the JDK you are using.

Peter Johnson wrote:The UnsupportedClassVersionError happens when you compile a Java application with a more recent version fo the JDK than what you are running with. For example if you compile with JDK 6 and then try to run with JDK 5. In your case, it looks like you are using JDK 1.4 while the Apache JAR you are using was compiled with 1.5. You need to upgrade the JDK you are using.

Thank You.