Dereferencing null is undefined behaviour in C. Probably it could be handled with platform-specific code, but handling it correctly not the easiest thing to do. Other than dereferencing null, there're so many ways to accidentally blow up C code and something like reading uninitialised memory is truly undefined behaviour which can't be worked around.

Java does not have undefined behaviour at all. Dereferencing null would throw NPE which is ordinary exception, completely fine to handle or suppress or whatever. There's no concept of uninitialised memory. The only sources of undefined behaviour in Java is calling native code or using unsafe methods which are very rare and usually located in well tested library code.

Even stack overflowing is defined behaviour and you can easily recover from it.