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javacverbosity

javac flag to print only the error locations

Is it possible to make javac output only the error locations and the error messages, and hide the source code dump?

Now I get:

$ javac t.java
t.java:1: <identifier> expected
class {
     ^
t.java:2: reached end of file while parsing
bar
   ^
t.java:4: reached end of file while parsing

^
3 errors

I want to get only:

$ javac ... t.java
t.java:1: <identifier> expected
t.java:2: reached end of file while parsing
t.java:4: reached end of file while parsing
Solution

  • I think there is no flag you could pass to javac, but you can simply filter the output through any program which removes the superfluous lines. Here an example with grep:

    javac t.java 2>&1 | egrep '^[a-zA-Z0-9_/]+\.java:[0-9]+: '

    You might have to change the part matching the file name if you have strange letters in your file name - this seems to work for the ASCII subset.