CODEWITHSUNDEEP
javafilelogging
python
python

Reputation: 1940

Is there any way that Java could get current file name and current line number?

In C++, the file of the source code and current line number is decided by FILE and INLINE, which is decided at compiling time, is there any method in Java that could do the similar thing? The file and line number is decided at compiling time instead of runtime? this will be convenient for log. I kind of doubt that use runtime method to detect these information will decrease the performance.

Upvotes: 6

Views: 3275

Answers (1)

Elliott Frisch
Elliott Frisch

Reputation: 201447

You could use Thread.getStackTrace() and something like

System.out.println(Thread.currentThread().getStackTrace()[1]);

Output includes the current method and line number (if debugging was compiled in). For example,

com.stackoverflow.Main.main(Main.java:23)

Upvotes: 6

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