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OnJava8-Examples/exceptions/Rethrowing.java at master · CSapprenticeWT/OnJava8-Examples · GitHub
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Rethrowing.java
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Rethrowing.java
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// exceptions/Rethrowing.java
// (c)2021 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com for more book information.
// Demonstrating fillInStackTrace()
public
class
Rethrowing
{
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
Exception
{
try
{
f
();
}
catch
(
Exception
e
) {
System
.
out
.
println
(
"Inside g(), e.printStackTrace()"
);
e
.
printStackTrace
(
System
.
out
);
throw
e
;
}
}
public
static
void
h
()
throws
Exception
{
try
{
f
();
}
catch
(
Exception
e
) {
System
.
out
.
println
(
"Inside h(), e.printStackTrace()"
);
e
.
printStackTrace
(
System
.
out
);
throw
(
Exception
)
e
.
fillInStackTrace
();
}
}
public
static
void
main
(
String
[]
args
) {
try
{
g
();
}
catch
(
Exception
e
) {
System
.
out
.
println
(
"main: printStackTrace()"
);
e
.
printStackTrace
(
System
.
out
);
}
try
{
h
();
}
catch
(
Exception
e
) {
System
.
out
.
println
(
"main: printStackTrace()"
);
e
.
printStackTrace
(
System
.
out
);
}
}
}
/* Output:
originating the exception in f()
Inside g(), e.printStackTrace()
java.lang.Exception: thrown from f()
at Rethrowing.f(Rethrowing.java:8)
at Rethrowing.g(Rethrowing.java:12)
at Rethrowing.main(Rethrowing.java:32)
main: printStackTrace()
java.lang.Exception: thrown from f()
at Rethrowing.f(Rethrowing.java:8)
at Rethrowing.g(Rethrowing.java:12)
at Rethrowing.main(Rethrowing.java:32)
originating the exception in f()
Inside h(), e.printStackTrace()
java.lang.Exception: thrown from f()
at Rethrowing.f(Rethrowing.java:8)
at Rethrowing.h(Rethrowing.java:22)
at Rethrowing.main(Rethrowing.java:38)
main: printStackTrace()
java.lang.Exception: thrown from f()
at Rethrowing.h(Rethrowing.java:27)
at Rethrowing.main(Rethrowing.java:38)
*/
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