java.lang.NoClassDefFoundError: com/sun/java/util/collections/Map

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com/sun/java/util/collections/Map
java.lang.NoClassDefFoundError: com/sun/java/util/collections/Map
at weblogic.common.internal.ThreadStorage.(ThreadStorage.java:17)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:245)
at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:180)
at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:771)
at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:169)
at javax.naming.InitialContext.(InitialContext.java:146)
at com.galdos.ui.toolbar.MainApplet.open(MainApplet.java:282)
at com.galdos.ui.toolbar.MainApplet.main(MainApplet.java:259)

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