More breakages are expected going forward, though. That's the whole idea of releasing early and oftenly (and having customers to pay for backward-compat). Note I'm not saying Oracle has no right to monetize Java, though it could be said what makes Java valuable is the (mostly OSS) ecosystem around it, rather than Java the language itself or the JVM.
> As a Java developer, ...
I've been developing Java for a living since almost the beginning (since 1997), but I'd seriously recommend not tying yourself to a particular language as in "Java developer". Java is but a tool among others, and I generally can work better with devs that know more than just Java, for the pragmatism and utilitarism they bring, rather than Java devs dogmatizing and bragging about the latest fad in Java idioms and libs.