java - Java出现未报告的异常

Question

    public void createDirectory(String path) {
        try {
            shellSupport.executeCommand("hadoop fs -mkdir "+path);
            logger.info("Directory "+path+" created successfully");
        } catch(Exception exc) {
            throw exc;
        }
    }

错误

error: unreported exception Exception; must be caught or declared to be thrown

如果我删除try catch，则代码将编译，记录器将显示该消息，但未创建目录。

Answer 1

如果要抛出异常，则必须在方法签名中声明它。在你的情况下

public void createDirectory(String path) throws Exception

或者你可以不扔就捕获它

try {
    shellSupport.executeCommand("hadoop fs -mkdir "+path);
    logger.info("Directory "+path+" created successfully");
} catch(Exception exc) {
    exc.printStackTrace();
    // handle your exception
}