即使发生异常，如何继续执行程序？

Question

In my program I have to constantly access the hard drive thousands of times to view images (no way around it), occasionally my program gets tripped up on a "file not found IO Exception" most likely because of the many modifications I'm making to the images and re saving quickly. How do I continue my program even if this error occurs, because currently it causes my program to stop?

Code:

filepattern=imageLocation+temp+"image.jpg";
File outputfile = new File(filepattern);

BufferedImage img = null;
try {
    img = ImageIO.read(outputfile);
} catch (IOException e) {
}                 

Note: I have fixed the problem by making sure the file exists first. Thanks for all your help!

Answer 1

Catch the exception and handle it as needed.

try {

// your code

} catch (<Expected exception> e) {
// handle the exception
}

Answer 2

Surround the statement with a try catch .

This will stop the code from crashing and in the catch block you can write code to deal with the failure.

Answer 3

There are 3 key words try {} executes the block that can cause problems catch (Exception ex) {} executes code to handle specific exceptions. Instead of Exception you can handle specific exception types finally {} executes cleanup code. Even if exception occurs and breaks the execution flow in try block, this code will always execute.

Answer 4

You might try something like the fragment below. Of course, you will want to encapsulate the actual reading in a try / catch / finally block to make sure you close the file

try {
    filesTried++;
    [you code]
} catch (IOException e) {
    fileErrors++;