How to continue log on same line in Java?
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1 tf 1 tt 4 7s 5 s%n
This is similar to this question, which is about a bash file.
We've created a log which outputs to the console while we're running our TestNG tests:
private Log log = LogFactory.getLog(xyz.class);
Later on, during the tests, the log is filled with details to let us know what exactly is being done:
log.info("Setting browser..."); this.browser = browser; log.info("Completed.");
Right now it's printing out as you would expect:
Setting browser... Completed.
I'd like to have this print out on the same line:
and a few milliseconds later:
Is this possible with the LogFactory?
Without knowing precisely which logging library you are using, I would guess that the answer is almost certainly not unless you want to explicitly specify a newline character everywhere else.
Log4J) frameworks allow you to plugin formatters to format your statements. You'd need to specify a format which did not end with a newline character. For example, in Log4J. they give an example pattern as
%-5p [%t]: %m%n
So if you removed everything except the
%n is the newline and the other stuff includes the time and log-level;
%p respectively, I think), newlines would not be automatically appended to each statement.
However, this means that everywhere else, your other log statements would have to look like this:
log.info("I want this on one line\n");
Printing on the same line in the console (Beginning Java forum at , Win a copy of Spark in Action this week in the Open Source Projects forum! Forums Register Login. Java � Beginning Java. Printing on the same� The continue keyword can be used in any of the loop control structures. It causes the loop to immediately jump to the next iteration of the loop. In a for loop, the continue keyword causes control to immediately jump to the update statement.
Leave the log alone. If you want it more readable, post-process it.
Messing with the log file will lose information unless you are careful. Look at timestamps as an example. If your
Setting browswer.. log statement has a timestamp included, putting the
completed statement without its timestamp is a loss of information and having two timestamps on the same line does not seem natural.
How to print without newline in Python?, will result into this geeks geeksforgeeks. But sometime it may happen that we don't want to go to next line but want to print on the same line. So what we can do ? Java Continue. The continue statement breaks one iteration (in the loop), if a specified condition occurs, and continues with the next iteration in the loop.. This example skips the value of 4:
Here is a simple alternative that doesn't require any change in the logger configuration if you use the
slf4j-api with the
It can be achieved by using the
Logger.printf method, like so:
import org.slf4j.Logger import org.slf4j.LoggerFactory ...
private static final Logger log = LoggerFactory.getLogger(YourClass.class) ...
Inside a loop
... log.printf("> Processed %d/%d\r", ++yourCounter, maxCounter) // Will log in the same line due to \r ...
22:12:15.169 [main] INFO your.package.YourClass - Previous log output a... 22:12:15.170 [main] INFO your.package.YourClass - Previous log output b... 22:12:15.170 [main] INFO your.package.YourClass - Previous log output c... > Processed 1398/4096
Beginning Java, Remember: The basic output statement in Java is text ”); will print what is between the double quotes and leave the printing cursor on the same line. Java Logging API was introduced in 1.4 and you can use java logging API to log application messages. In this java logging tutorial, we will learn basic features of Java Logger. We will also look into Java Logger example of different logging levels, Logging Handlers, Formatters, Filters, Log Manager and logging configurations. Java Logger. java
display text on the same line in a loop, I'm going to assume you're using Java, because nobody should use RTP print a newline character, your input will continue on the same line. You can break an argument list with the line-continuation character, but the individual names of the arguments must remain intact. You can't continue a comment by using a line-continuation character. The compiler doesn't examine the characters in a comment for special meaning. For a multiple-line comment, repeat the comment symbol (') on each line.
Simple input and output, In Java, there are two related functions that are used in simple output. These are This means that the next output will continue on the same line. Line 5 uses� I'm trying to write code that asks for the users age and then they enter it, but I want the number to appear next to the question after you enter it. My code looks like this: System.out.println("
scripts - How can I print multiline output on the same line?, As always you can use input and output redirection and pipes to read from or write to files and other processes. If you want to keep the last� For example, in Linux, a new line is denoted by “ ”, also called a Line Feed. In Windows, a new line is denoted using “\r ”, sometimes called a Carriage Return and Line Feed, or CRLF. Adding a new line in Java is as simple as including “ ” or “\r” or “\r ” at the end of our string. 2.1. Using CRLF Line-Breaks
- How would people be able to answer this when you have not told them what logging framework you are using?
- @oxbow_lakes It looks like he is using one from Apache.
- In our Maven Dependencies, I'm seeing Log4J, but when I press F3 it takes me to commons-logging, so I'm thinking @ColinD is correct.
- commons-logging is an interface which requires an underlying implementation, which is therefore presumably Log4J. See my answer below for how to do this (although there's a drawback)
- Don't know why it was downvoted, but it would dump the time, thread, etc. for each msg without the newline on the same line, making it illegible, and breaking log analysis tools.
- was downvoted, due to the fact that all it was asking was for something you already put in a comment (ie not useful). downvote removed and given +1 as question has evolved and this is now an answer.
- Colin, that's just not true; look in the version history. The original answer mentioned pretty much all the current one does
- @ColinD It is generally not fair to downvote before leaving a comment and at least 5 minutes grace period for the answerer to respond.
- But without the timestamp etc. it's much, much less useful, and a variety of log analysis tools still wouldn't work well. It's still a valid solution, but imo the tradeoffs make it a sub-optimal one.