如何更改Exception的printStacktrace（）函數？

Question

我嘗試制作一個擴展Exception並覆蓋printstacktrace的新類。 現在的問題是，當嘗試類似thr以下的操作時，出現錯誤“ LoggerException的Unreachable catch塊。永遠不會從try語句主體中拋出此異常”

公共類LoggerException擴展了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

您應該擴展RuntimeException類