Java error log is a error that arises due to internal error. A error logger
is simple an object that is used to show an error log message for a specifice
system and component used in an application.
In this Tutorial we want to describe you a code that show a java error log, for
this we have a Class name'javaerrorlog' .Inside the class name we have a
private static variable logger that returns you a logger name according
to name of the parameter passed in it by calling a method name get Logger().
Inside the main static method ( ) . The class file handler is inherited from
java.util.logging.The function of file handler is to either write in the
specified file used in your programming. The file handler write to a specified
file i.e. log.txt and store in a object of class File Handler name 'handler'.
Now understand list of method used in code-
|
add Handler
|
This is used to add a handler in order to receive
logging
message.
|
| set Level
|
This method returns you or set the level for
a globally registered method. In brief you can say this is used to
set the log level message specify the message logged by the specified user.
|
| info
|
This method return you an info message to you . The code consists of try-catch block to check the exception arises in code. for
every subsequent try block there is a catch block that consists of a method name.
|
| log
|
This method return you log a log
record.
|
code to understand java log error
import java.util.logging.FileHandler;
import java.util.logging.Level;
import java.util.logging.Logger;
public class javaerrorlog {
private static Logger l = Logger.getLogger("");
public static void main(String args[]) throws Exception{
FileHandler handler = new FileHandler("log.txt");
l.addHandler(handler);
l.setLevel(Level.ALL);
l.info("Error logs");
try {
} catch (Error ex) {
l.log(Level.INFO, "", ex);
}
l.fine("");
}
}
|
Output
compile-single:
run-single:
22 Oct, 2008 6:05:40 PM java.util.logging.LogManager$RootLogger log
INFO: Error logs
BUILD SUCCESSFUL (total time: 1 second)
|
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