java - How to replace the usage of System.out or System.err by a logger? -

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i have simple if condition in use system.out.println. know how can modify code in order replace usage of system.out logger ?

if(myvar.getdate().equals(20141127) && myvar.getnumber().equals(1)) {                 system.out.println(""); }

any suggestions ?

thanks

you can use logger utility log details.

have @ apache log4j

the logging simple 

log.debug("this debug message");

where log instance of logger

for sample code can tutorial


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