为什么Java在catch块内返回statment不起作用？

Question

为什么即使抛出异常,以下代码也始终返回true？

public boolean write (ArrayList<String> inputText, String locationToSave){

    try {           
        File fileDir = new File(locationToSave);
        Writer out = new BufferedWriter(new OutputStreamWriter(
        new FileOutputStream(fileDir), "utf8"));

        int index = 0;
        int size = inputText.size();
        while (index < size) {
                    out.append(inputText.get(index));
                    out.append("\n");
                    index++;
                    }
        out.flush();
        out.close();

        return true;

   } catch (UnsupportedEncodingException e) {
        System.out.println("UnsupportedEncodingException is : \n" + e.getMessage());
        return false;
   } catch (IOException e) {
        System.out.println("IOException is : \n" + e.getMessage());
        return false;
   } catch (Exception e) {
        System.out.println("Exception is : \n" + e.getMessage());
        return false;
   }
}

---

第01版

这是我用来测试前面代码的代码:

 if (fileReader.write(fileReader.read(selectedFile), selectedSaveLocation)) {
        System.out.println("The file : " + selectedFile + " as been successfully"
        + "converted to : " + selectedSaveLocation );
    } else {
        System.out.println("The file : " + selectedFile + " failed to convert!" );
    }

Answer 1

我不认为你看到你认为你所看到的.换句话说,我很确定它实际上是返回false,你应该检查调用代码.

例如,我将您的代码粘贴到一个新的Java控制台应用程序中,使其成为静态,并使用此主体编写一个main方法:

System.out.println(write(null, null)); 

输出是:

Exception is : 
null
false