从主类中的静态字段中捕获异常

Question

I never really thought about this before but looking at the following code

public class SomeJavaProgram {

    private static String runMe() {
        throw new RuntimeException("hi tadsfasdf");
    }
    private static String name = runMe();

    public static void main(String[] args) {
        System.out.println("hi there.");
    }
}

I never did statics like this in a main before but then I entered scala, and if you have subclasses that start adding defs, exceptions can be thrown before main is even called.

So, in java(not scala), is there a way to catch these exceptions(if I am the superclass and subclasses end up having a static field that throws an exception or static initializer block)....how can I catch all these?

I of course do rely on ONE single definition not throwing which is the

private Logger log = createLoggerFromSomeLoggingLib();

But after that, ideally I would want all exceptions to be logged to the logged file rather than stderr.

That said, I am glad I have always kept the stderr/stdout files along with my logging files now.

Answer 1

Use the static initializer:

private static String name;

static {
    try {
        name = runMe();
    } catch (RuntimeException e) {
        // handle
    }
}