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

错误：未报告的异常 必须被抓住或宣布被抛出

如果删除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

仅添加以下内容还不够：

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

也就是说： public void createDirectory(String path) throws Exception方法public void createDirectory(String path) throws Exception吗？

Answer 2

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

或者你可以不扔就抓住它

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