Debugging and Logging

Overview

Debugging and logging are essential for identifying and resolving issues in Java applications.

Topics

• Using Debuggers (e.g., IDE tools)
• Logging Frameworks (e.g., java.util.logging, Log4j, SLF4J)
• Best Practices for Logging

Examples

Debugging

Use breakpoints in your IDE to inspect variables and step through code.

Logging with java.util.logging

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("This is an info message");
        logger.warning("This is a warning message");
    }
}

Logging with Log4j

import org.apache.log4j.Logger;

public class Log4jExample {
    private static final Logger logger = Logger.getLogger(Log4jExample.class);

    public static void main(String[] args) {
        logger.info("Info message");
        logger.error("Error message");
    }
}

Tags

#java #debugging #logging