Usage example

Main.java

import java.util.Calendar;

public class Main {

	private static final Logger LOG = new Logger();

	public static void main(String[] args) {

		LOG.setLevel(Level.WARNING);

		// This will be logged as the log level is WARNING
		LOG.log(Level.WARNING, { => "Simple log message"});

		// A complex log message that will be logged
		LOG.log(Level.WARNING, { => 
			Calendar cal = Calendar.getInstance();
			StringBuilder msg = new StringBuilder();
			msg.append("Current calendar object is: ").append(cal).append("\n");
			msg.toString()
		});

		// A complex log message that won't be logged
		LOG.log(Level.INFO, { => 
			StringBuilder str = new StringBuilder();
			for (int i = 0; i < 10; i++) {
				str.append(i).append(" ");
			}
			str.toString()
		});

	}
}