Comment by nextaccountic

safe Rust is actually more memory safe than Java, since it guards against data races (in Java data races are not UB, but they are still one of the worst kinds of bugs because it leads to logically impossible program states)

Also note that Java has unsafe, but doesn't have the culture of plainly stating safety invariants like Rust. The unsafe features of Java are less widely used, but when they are you rarely know if a Java library has unsafe internals for performance, and if they do, it may be hard to audit