Java，父类，带有异常抛出的方法

我有一个方法，如何抛出异常。而不是试图抓住

这是一个基本的void方法，读取文件

public void method(String filename){
//does some stuff to the file here
}

简单到：

public void method(String filename) throws Exception
{
    if (error)
        throw new Exception("uh oh!");
}

或者，如果需要自定义异常：

class MyException extends Exception
{
    public MyException(String reason)
    {
        super(reason);
    }
}

public void method(String filename) throws MyException
{
    if (error)
        throw new MyException("uh oh!");
}

简单到：

public void method(String filename) throws Exception
{
    if (error)
        throw new Exception("uh oh!");
}

或者，如果需要自定义异常：

class MyException extends Exception
{
    public MyException(String reason)
    {
        super(reason);
    }
}

public void method(String filename) throws MyException
{
    if (error)
        throw new MyException("uh oh!");
}

---

作为第一步，我认为你需要通过

这取决于要抛出的异常类型

如果要抛出未检查的异常

public void method(String filename){
    if(error condition){
        throw new RuntimeException(""); //Or any subclass of RuntimeException
    }
}

public void method(String filename) throws Exception{ //Here you can mention the exact type of Exception thrown like IOExcption, FileNotFoundException or a CustomException
    if(error condition){
        throw new Exception(""); //Or any subclass of Exception - Subclasses of RuntimeException
    }
}

如果要抛出选中的异常

public void method(String filename){
    if(error condition){
        throw new RuntimeException(""); //Or any subclass of RuntimeException
    }
}

public void method(String filename) throws Exception{ //Here you can mention the exact type of Exception thrown like IOExcption, FileNotFoundException or a CustomException
    if(error condition){
        throw new Exception(""); //Or any subclass of Exception - Subclasses of RuntimeException
    }
}

---

作为第一步，我认为你需要通过

这取决于要抛出的异常类型

如果要抛出未检查的异常

public void method(String filename){
    if(error condition){
        throw new RuntimeException(""); //Or any subclass of RuntimeException
    }
}

public void method(String filename) throws Exception{ //Here you can mention the exact type of Exception thrown like IOExcption, FileNotFoundException or a CustomException
    if(error condition){
        throw new Exception(""); //Or any subclass of Exception - Subclasses of RuntimeException
    }
}

如果要抛出选中的异常

public void method(String filename){
    if(error condition){
        throw new RuntimeException(""); //Or any subclass of RuntimeException
    }
}

public void method(String filename) throws Exception{ //Here you can mention the exact type of Exception thrown like IOExcption, FileNotFoundException or a CustomException
    if(error condition){
        throw new Exception(""); //Or any subclass of Exception - Subclasses of RuntimeException
    }
}

---

如果异常是未检查的异常，则不需要

抛出

。此外，将带参数的构造函数添加到

MyException

。如果异常是未检查的异常，则不需要

抛出

。此外，将带参数的构造函数添加到

MyException

。