71 lines
2.0 KiB
Java
71 lines
2.0 KiB
Java
// exceptions/Rethrowing.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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// Demonstrating fillInStackTrace()
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public class Rethrowing {
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public static void f() throws Exception {
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System.out.println(
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"originating the exception in f()");
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throw new Exception("thrown from f()");
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}
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public static void g() throws Exception {
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try {
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f();
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} catch(Exception e) {
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System.out.println(
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"Inside g(), e.printStackTrace()");
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e.printStackTrace(System.out);
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throw e;
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}
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}
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public static void h() throws Exception {
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try {
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f();
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} catch(Exception e) {
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System.out.println(
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"Inside h(), e.printStackTrace()");
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e.printStackTrace(System.out);
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throw (Exception)e.fillInStackTrace();
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}
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}
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public static void main(String[] args) {
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try {
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g();
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} catch(Exception e) {
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System.out.println("main: printStackTrace()");
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e.printStackTrace(System.out);
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}
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try {
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h();
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} catch(Exception e) {
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System.out.println("main: printStackTrace()");
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e.printStackTrace(System.out);
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}
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}
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}
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/* Output:
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originating the exception in f()
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Inside g(), e.printStackTrace()
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java.lang.Exception: thrown from f()
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at Rethrowing.f(Rethrowing.java:8)
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at Rethrowing.g(Rethrowing.java:12)
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at Rethrowing.main(Rethrowing.java:32)
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main: printStackTrace()
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java.lang.Exception: thrown from f()
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at Rethrowing.f(Rethrowing.java:8)
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at Rethrowing.g(Rethrowing.java:12)
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at Rethrowing.main(Rethrowing.java:32)
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originating the exception in f()
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Inside h(), e.printStackTrace()
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java.lang.Exception: thrown from f()
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at Rethrowing.f(Rethrowing.java:8)
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at Rethrowing.h(Rethrowing.java:22)
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at Rethrowing.main(Rethrowing.java:38)
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main: printStackTrace()
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java.lang.Exception: thrown from f()
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at Rethrowing.h(Rethrowing.java:27)
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at Rethrowing.main(Rethrowing.java:38)
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*/
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