Each of the four fields can be individually enabled or disabled. The time format depends on the DateFormat used.
Here is an example TTCCLayout output with the {@link org.apache.log4j.helpers.RelativeTimeDateFormat}.
176 [main] INFO org.apache.log4j.examples.Sort - Populating an array of 2 elements in reverse order. 225 [main] INFO org.apache.log4j.examples.SortAlgo - Entered the sort method. 262 [main] DEBUG org.apache.log4j.examples.SortAlgo.OUTER i=1 - Outer loop. 276 [main] DEBUG org.apache.log4j.examples.SortAlgo.SWAP i=1 j=0 - Swapping intArray[0] = 1 and intArray[1] = 0 290 [main] DEBUG org.apache.log4j.examples.SortAlgo.OUTER i=0 - Outer loop. 304 [main] INFO org.apache.log4j.examples.SortAlgo.DUMP - Dump of interger array: 317 [main] INFO org.apache.log4j.examples.SortAlgo.DUMP - Element [0] = 0 331 [main] INFO org.apache.log4j.examples.SortAlgo.DUMP - Element [1] = 1 343 [main] INFO org.apache.log4j.examples.Sort - The next log statement should be an error message. 346 [main] ERROR org.apache.log4j.examples.SortAlgo.DUMP - Tried to dump an uninitialized array. at org.apache.log4j.examples.SortAlgo.dump(SortAlgo.java:58) at org.apache.log4j.examples.Sort.main(Sort.java:64) 467 [main] INFO org.apache.log4j.examples.Sort - Exiting main method.
The first field is the number of milliseconds elapsed since the start of the program. The second field is the thread outputting the log statement. The third field is the level, the fourth field is the category to which the statement belongs.
The fifth field (just before the '-') is the nested diagnostic context. Note the nested diagnostic context may be empty as in the first two statements. The text after the '-' is the message of the statement.
{@link PatternLayout} offers a much more flexible alternative. @author Ceki Gülcü @author Heinz Richter @deprecated Please use {@link PatternLayout} instead.
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