In this tutorial, we will see how to check if an expected file exists or not using the JAVA code. We are going to use ‘File.exists()’ method of Java-IO library. In order to do so, first we would need to create a temporary file and then we will perform the existence check.
Simple example to test if File present or not in Java, Share It... Share on XExample:
import java.io.File;
import java.io.IOException;
public class CheckIfFileExists {
static File tempFile;
public static void main(String[] args) {
//Lets create a temp file first
try {
tempFile = File.createTempFile("tempFile", ".txt");
} catch (IOException e) {
e.printStackTrace();
}
//Check if file exists
System.out.println("File present : "+ tempFile.exists());
//And, now lets delete the file.
tempFile.delete();
//Check if file exists
System.out.println("File present : "+ tempFile.exists());
}
}
Let’s try to understand the code:
1. Creating the temp file:
As mentioned at the top, first we need to create a temporary file using below code.
File tempFile;
tempFile = File.createTempFile("tempFile", ".txt");
2. Usage of ‘exists’ method:
Once the file has been created, we are going to use ‘exists‘ method of Java-IO library. It will test whether the file is present or not and based on the output, it will throw ‘pass‘ or ‘fail‘ in return.
tempFile.exists()
3. Additional check after deleting the file:
Now, by using below line of code, we are deleting the created file and performing the file existence check again.
tempFile.delete();
System.out.println("File present : "+ tempFile.exists());
Lets run the above specified ‘CheckIfFileExists’ class.
Eclipse Console Output:
File present : true File present : false
That’s it, it’s that simple to check if File exists in Java :)
Simple example to test if File present or not in Java, Share It... Share on X
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