NoClassDefFound error from Java program in UNIX

Question

I executing a Java class in Unix. The Java program that I am executing is a JDBC program connecting to SQL Server. I have the class file but when executing "Java" command I get this error. Below are the commands.

>cd /home/test

>ls 

JDBCConnection.class  JDBCConnection.java   jtds-1.2.5.jar

Running the below command gives me "NoClassDedFound" error.

java -cp jtds-1.2.5.jar JDBCConnection

Error message:

Exception in thread "main" java.lang.NoClassDefFoundError: JDBCConnection

Answer 1

将当前目录添加到类路径

 java -cp .:jtds-1.2.5.jar JDBCConnection

Answer 2

NoClassDefFoundError in Java comes when Java Virtual Machine is not able to find a particular class at runtime which was available during compile time.

In your case, you have not added the current directory to the classpath which holds the JDBCConnection.class classfile.

Try this out :

java -cp jtds-1.2.5.jar:. JDBCConnection

Read more: http://javarevisited.blogspot.com/2011/06/noclassdeffounderror-exception-in.html#ixzz2jxtG7mt5

Answer 3

Add . to the classpath:

java -cp jtds-1.2.5.jar -cp . JDBCConnection