Java开发网 - 异常

Topic: 异常

1.异常

Posted by: lisycn
Posted on: 2005-07-21 16:59

public class ThrowOut {
public static void f() throws Exception {
System.out.println("originating the exception in f()");
throw new Exception("thrown from f()");
}
public static void g() throws Throwable {
try {
f( );
} catch(Exception e) {
System.err.println("Inside g(), e.printStackTrace()");
e.printStackTrace(System.err);
throw e; // 17
//throw e.fillInStackTrace(); // 18
}
}
public static void main(String[] args) throws Throwable {
try {
g();
} catch(Exception e) {//19
System.err.println("Caught in main, e.printStackTrace()");
e.printStackTrace(System.err);
}
}
}
请问//17重抛的e是Exception还是Throwable的引用，如是Throwable的引用那在//19捕获却是Exception 而Throwable是Exception的父类而他却能捕获为什么？是我那理解错了