如何更改 printStacktrace() 对异常的作用？

Question

我尝试创建一个扩展异常并覆盖 printstacktrace 的新类。现在的问题是，当它尝试以下类似的操作时，我收到一个错误“无法访问 LoggerException 的 catch 块。这个异常永远不会从 try 语句体中抛出”

公共类 LoggerException 扩展 Throwable {

private static final long serialVersionUID = 1L;
@Override
public void printStackTrace() {
    // TODO Auto-generated method stub
    super.printStackTrace();

    Logger logger = Logger.getLogger("custom app exception");
    logger.log(Level.WARNING,getMessage(),this);

}

}


try {
  //do something that does throw anything. but just incase there is a null pointer or something

} catch (LoggerException e) { // error: Unreachable catch block for LoggerException. This exception is never thrown from the try statement body
    e.printStackTrace(); 
}

Answer 1

你应该扩展 RuntimeException 类