Logging is an essential part of software development that helps developers and system administrators monitor and troubleshoot applications. By keeping records of runtime events, errors, and other critical information, logging enables teams to analyze application behavior, maintain performance, and ensure reliability.
In Java, logging can be implemented using various logging frameworks, with the most commonly used being the built-in java.util.logging
package, as well as popular libraries like Log4j and SLF4J. These frameworks provide a robust way to log messages at different severity levels (e.g., INFO, DEBUG, WARN, ERROR) and direct outputs to various destinations such as console, files, or remote servers.
import java.util.logging.Level;
import java.util.logging.Logger;
public class LoggingExample {
private static final Logger logger = Logger.getLogger(LoggingExample.class.getName());
public static void main(String[] args) {
logger.info("Application started");
try {
// Simulate some operations
int result = divide(10, 0);
logger.info("Result: " + result);
} catch (ArithmeticException e) {
logger.log(Level.SEVERE, "Error occurred: ", e);
}
logger.info("Application ended");
}
private static int divide(int a, int b) {
return a / b;
}
}
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