Error complie "Exception in thread "main" java.lang.NoClassDefFoundError"

Question

Dear All,
I have the following problem can not compile the code below.
Here my settings and the code.
Thanks for the help.
My java version.
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D:\bea\jdk150_22\bin>java -version
java version "1.5.0_22"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_22-b03)
Java HotSpot(TM) Client VM (build 1.5.0_22-b03, mixed mode)
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I use a bat to compile the code
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set JDK_HOME=D:\bea\jdk150_22
set PATH=%JDK_HOME%\bin;%PATH%
set CLASSPATH=%CLASSPATH%;D:\oracle\product\10.2.0\client_1\jdbc\lib\classes12.jar
rem ---- compile
javac GetDBOracle.java
rem ---- testing
java GetDBOracle
rem ---- add to jar
jar cf GetDBOracle.jar GetDBOracle.class
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My java code
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import java.sql.*;
import java.io.*;
public class GetDBOracle {
public static String GetDBOracle(String Parm1, String Parm2) throws SQLException
String myResult = "";     
// Load Oracle driver
DriverManager.registerDriver (new oracle.jdbc.OracleDriver());
// Connect to the local database
Connection conn = DriverManager.getConnection
("jdbc:oracle:thin:@localhost:ORCL", "ORC", "ORC2010");     
// Query the employee names
Statement stmt = conn.createStatement ();
ResultSet rset = stmt.executeQuery ("SELECT JAVA_GET_VALUE('"Parm1"','"Parm2"') FROM DUAL");
// Print the name out
while (rset.next ()) {
myResult = rset.getString (1);
//close the result set, statement, and the connection
rset.close();
stmt.close();
conn.close();     
return myResult;
public static void main(String args[])
try {
System.out.println(GetDBOracle("XXI", "12000"));
} catch (Exception e) {
System.out.println(e.getMessage());
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Erro
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Exception in thread "main" java.lang.NoClassDefFoundError: GetDBOracle
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Answer 1

What happened to this Error complie "Exception in thread "main" java.lang.NoClassDefFoundError" ?