Behavior of nested finally in Exceptions
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kuriouscoder
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Published on 2011-01-12T02:47:01Z
Indexed on
2011/01/12
2:53 UTC
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java
Hello:
Today at work, I had to review a code snippet that looks similar to this mock example.
package test;
import java.io.IOException;
import org.apache.log4j.Logger;
public class ExceptionTester {
public static Logger logger = Logger.getLogger(ExceptionTester.class);
public void test() throws IOException {
new IOException();
}
public static void main(String[] args) {
ExceptionTester comparator = new ExceptionTester();
try {
try {
comparator.test();
} finally {
System.out.println("Finally 1");
}
} catch(IOException ex) {
logger.error("Exception happened" ex);
// also close opened resources
}
System.out.println("Exiting out of the program");
}
}
It's printing the following output.I expected an compile error since the inner try did not have a catch block.
Finally 1 Exiting out of the program
I do not understand why IOException is caught by the outer catch block. I would appreciate if anyone can explain this, especially by citing stack unwinding process
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