“The Java 7u21 release introduces changes to security messages related to running Java applets and applications,” Oracle said in a technical document that explains the changes.

Java’s code-signing requirements have proven to be a bust, security researchers say, and now even longtime developers are losing faith in the programming language.

In addition to security fixes, the new update will also make changes to how Java applets—Web-based Java applications—are handled and presented in Web browsers that have the Java plug-in ...