java - Eclipse怎堪看完整的堆栈信息

Answer 1

The last line of the lowest exception and the first line of the previous one are combined to form the completed stack information.

Reason:
These exception information are passed Throwable.printStackTrace()输出到System.err, first quote a description from the JDK official document

HighLevelException: MidLevelException: LowLevelException
         at Junk.a(Junk.java:13)
         at Junk.main(Junk.java:4)
 Caused by: MidLevelException: LowLevelException
         at Junk.c(Junk.java:23)
         at Junk.b(Junk.java:17)
         at Junk.a(Junk.java:11)
         ... 1 more
 Caused by: LowLevelException
         at Junk.e(Junk.java:30)
         at Junk.d(Junk.java:27)
         at Junk.c(Junk.java:21)
         ... 3 more

Note the presence of lines containing the characters "...". These lines indicate that the remainder of the stack trace for this exception matches the indicated number of frames from the bottom of the stack trace of the exception that was caused by this exception (the "enclosing" exception).

These lines indicate that the remainder of this exception's stack trace matches the specified number of frames from the bottom of the stack trace of the exception (caused by the "enclosing" exception)

can also be understood in this way. The calls between methods are all stack models. For example, a.b.c means that method a calls method b, and method b calls method c. Then the exception thrown in method c only represents the information in the stack frame of method c. The exception thrown by method b will have the information of two stack frames b and c, and so on.