The abnormal processing and log record of the core frame in the Java class library
The abnormal processing and log record of the core frame in the Java class library
In Java programming, abnormal processing and log records are very important core frameworks.Abnormal treatment refers to capture, processing and records when encountering errors or abnormalities during the program execution process.The log record is used to record important information in the program execution process, which is convenient for subsequent investigation BUG and optimization programs.
In the Java class library, a wealth of abnormal processing and log records are provided. Developers can choose suitable tools according to specific needs for abnormal processing and log records.
The core category of abnormal treatment is Java.lang.throwable class, which is a parent class of all errors and abnormalities.During the procedure, when abnormalities occur, you can use the TRY-CATCH statement to capture abnormalities and processes it accordingly.The following is a simple example of abnormal treatment:
try {
// There may be an abnormal code
int result = 10 / 0;
} catch (ArithmeticException e) {
// Capture and handle abnormalities
System.out.println ("" Occupible abnormality: " + e.getMessage ());
}
The core category of log records is Java.util.logging.logger class, which provides a wealth of logging functions, including recording log information of different levels, output to different goals.The following is a simple log record example:
import java.util.logging.Level;
import java.util.logging.Logger;
public class LogTest {
private static final Logger logger = Logger.getLogger(LogTest.class.getName());
public static void main(String[] args) {
logger.info ("This is a information log");
Logger.warning ("This is a warning log");
Logger.severe ("This is a serious mistake");
}
}
In addition to the two core categories introduced above, the Java class library also provides other rich abnormal processing and log record tools and libraries, such as log4j, SLF4J, Commons Logging, etc. Developers can choose suitable tools according to specific needs to conduct appropriate tools for conductAbnormal treatment and log records.
In short, in Java programming, good abnormal processing and log records are very important. It can help developers find and solve problems in time, improve the stability and maintenance of the program.It is hoped that developers can make full use of the rich abnormal treatment and log record tools in the actual development of the Java class library to write high -quality procedures.
