Question

I’m learning Java, and I’m trying to write a program that can read from a .ser file, which I’ve already created with a writeTo() method.

I want to know a given file exists in the system before I tell the program to read from it.

My code looks like this:

public boolean readFromSerializedFile(String fileName){
    FileInputStream fileInStream = null;
    ObjectInputStream objectInStream = null;

    try{
        fileInStream = new FileInputStream(fileName);  
        objectInStream = new ObjectInputStream(fileInStream);

Is there a simple way I can determine if the file with the name of the parameter exists in the root directory (or wherever else specified)?

Answer 1

You can use File.exists() method.

Let’s suppose you want to know if file abc.xml exists. The following code illustrates how to do it.

final File file = new File ("abc.xml");
final boolean exists = file.exists ();
System.out.println ("abc.xml " + (exists ? "exists" : "does not exist"));