File reading and writing exception in Java - java.io.FileNotFoundException What to do?

As one of the most popular programming languages ​​today, Java has always been one of the first choices for everyone to learn and use. Whether developing large-scale applications or small projects, Java has very strong support and advantages. During the Java development process, file reading and writing exceptions are often encountered, and the most common exception is java.io.FileNotFoundException. So how to solve this exception?

1. Confirm whether the path is correct

First make sure that the file being read exists and the path is correct. If the file does not exist or the path is incorrect, a FileNotFoundException will be thrown. Therefore, when writing a program, we need to carefully check whether the path is correct.

2. Confirm file permissions

When performing file read and write operations, you need to ensure that the current user has read and write permissions for the file. If these permissions are not available, a FileNotFoundException will be thrown. Therefore, we need to double check that the file permissions are correct.

3. Use absolute paths

Using absolute paths can avoid path errors. Therefore, it is recommended to use absolute paths when writing programs to read and write files.

4. Using relative paths

The relative path will be calculated based on the path of the current program, so you need to ensure that the current program path is correct. If the current program path is incorrect, FileNotFoundException will be thrown. Therefore, we need to carefully check whether the current program path is correct.

5. Use try-catch statement

When performing file reading and writing operations, it is recommended to use try-catch statement to catch FileNotFoundException exception. This can help us handle exceptions better and avoid program crashes.

6. Use File object

Using File object can make file reading and writing operations more convenient and avoid FileNotFoundException exception. This is because the File object provides some methods to confirm whether the file exists and create files to avoid the occurrence of FileNotFoundException exceptions.

Summary:

The above is how to solve the file reading and writing exception in Java - java.io.FileNotFoundException. When writing a program, we need to carefully check the file path and file permissions, and use try-catch statements to catch exceptions. At the same time, we can use the File object to perform file operations. These methods can effectively avoid FileNotFoundException exceptions and ensure the normal operation of the program.

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