我有两个文本文件,如果找不到文件,我想抛出异常。我有一个类FileReader来检查文件是否存在,在我的主要文件中我试图捕获异常。
public FileReader() throws FileNotFoundException {
super();
File file1 = new File("file1.txt");
File file2 = new File("file2.txt");
//Throws the FileNotFoundException if the files aren't found
if (!file1.exists()) {
throw new FileNotFoundException("File \"file1.txt\" was not found.");
} else {
//do something
}
if (!file2.exists()) {
throw new FileNotFoundException("File \"file2.txt\" was not found.");
} else {
//do something
}
在另一个类中,如果文件丢失,我想捕获异常。
public class FileIO {
public static void main(String[] args) {
try {
//do stuff
} catch(FileNotFoundException e) {
System.out.println(e.getMessage());
}
如果只缺少一个文件,这很有用。但如果缺少file1和file2,我只捕获第一个丢失文件的异常,然后程序结束。我的输出是:
File "file1.txt" is not found.
如何捕获两者的异常?我希望它输出:
File "file1.txt" is not found.
File "file2.txt" is not found.
答案 0 :(得分:2)
您可以在抛出异常之前先构造错误消息。
python setup.py install