Java source files are not getting compiled after making updation in source code on an eclipse project -

i've tried lot fail latest compiled .class files source code after making updation. project giving response same in older source file. updation on jsp files getting reflect instantly not in case of java files.

j2ee project
eclipse juno
jetty-6.1.x

jul 15, 2013 1:04:57 pm com.google.apphosting.utils.config.appenginewebxmlreader      readappenginewebxml info: processed c:\users\atul dwivedi\git\careeryantra\war\web-inf/appengine-web.xml jul 15, 2013 1:04:58 pm com.google.apphosting.utils.config.abstractconfigxmlreader readconfigxml info: processed c:\users\atul dwivedi\git\careeryantra\war\web-inf/web.xml jul 15, 2013 1:04:58 pm com.google.appengine.tools.development.systempropertiesmanager setsystemproperties info: overwriting system property key 'java.util.logging.config.file', valu'c:\eclipse\plugins\com.google.appengine.eclipse.sdkbundle_1.8.1.1\appengine-java-sdk-  1.8.1.1\config\sdk\logging.properties' value 'web-inf/logging.properties' '    c:\users\atul dwivedi\git\careeryantra\war\web-inf\appengine-web.xml' jul 15, 2013 1:04:58 pm com.google.apphosting.utils.jetty.jettylogger info info: logging jettylogger(null) via com.google.apphosting.utils.jetty.jettylogger jul 15, 2013 7:34:59 com.google.apphosting.utils.jetty.jettylogger info info: jetty-6.1.x jul 15, 2013 7:35:01 com.google.apphosting.utils.jetty.jettylogger info info: started selectchannelconnector@127.0.0.1:8888 jul 15, 2013 7:35:01 com.google.appengine.tools.development.abstractserver startup info: server default running @ http://localhost:8888/ jul 15, 2013 7:35:01 com.google.appengine.tools.development.abstractserver startup info: admin console running @ http://localhost:8888/_ah/admin jul 15, 2013 1:05:01 pm com.google.appengine.tools.development.devappserverimpl start info: dev app server running 

everything fine older java file after making changes, seems project running on basis of older .class file.

check if have checked "build automatically" checkbox in project menu: