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java.lang.NoClassDefFoundError: 	at java.lang.Class.forName0(Native Method)	at java.lang.Class.forName(Class.java:120)	at java.awt.Toolkit$2.run(Toolkit.java:512)	at java.security.AccessController.doPrivileged(Native Method)	at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:503)	at com.bet.util.awt.Thumbnail.generateThumbnail(Thumbnail.java:19)	at jsp_servlet._Sandbox._klai._upload.__thumbgen._jspService(__thumbgen.java:111)	at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2495)	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2204)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)