Question

在我的代码中，我的一种方法说：

this.write("stuff")

，写方法是

public void write(String text) throws IOException
{
    FileWriter writer = new FileWriter(path, true);
    PrintWriter printer = new PrintWriter(writer);
    printer.printf("%s" + "%n", text);
    printer.close();
}

事情说有一个 FileWriter "unreported exception java.io.IOException; must be caught or declared to be thrown"。

我应该在try和catch语句中添加什么来修复异常？

Answer 1

如何处理任何类型的异常对Java开发至关重要。有两种方法可以做到：

public void write(String text) //notice I deleted the throw
{
    try{
        FileWriter writer = new FileWriter(path, true);
        PrintWriter printer = new PrintWriter(writer);
        printer.printf("%s" + "%n", text);
        printer.close();
    catch(IOException ioe){
        //you write here code if an ioexcepion happens. You can leave it empty if you want
    }
}

和...

public void write(String text) throws IOException //See here it says throws IOException. You must then handle the exception when calling the method
{
    FileWriter writer = new FileWriter(path, true);
    PrintWriter printer = new PrintWriter(writer);
    printer.printf("%s" + "%n", text);
    printer.close();
}

//like this:
public static void main(String[] args) //or wherever you are calling write from
{
    try{
            write("hello"); //this call can throw an exception which must be caught somewhere
        }catch(IOException ioe){/*whatever*/}
}

不知道如何处理FileWriter异常

1 个答案: