How to check a file exist or not in Java

Problem Description

How to check a file exist or not?

Solution

This example shows how to check a files existence by using file.exists() method of File class.

import java.io.File;

public class Main {
   public static void main(String[] args) {
      File file = new File("C:/java.txt");
      System.out.println(file.exists());
   }
}

Result

The above code sample will produce the following result (if the file "java.txt" exists in 'C' drive).

false

The following is an another sample example of file exist or not in java

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.PrintpWriter;

import java.nio.file.FileAlreadyExistsException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class fileexist {
   public static void main(String[] args) throws IOException {
      File f = new File(System.getProperty("user.dir")+"/folder/file.txt");
      System.out.println(f.exists());
      
      if(!f.getParentFile().exists()){
         f.getParentFile().mkdirs();
      } 
      if(!f.exists()){
         try {
            f.createNewFile();
         } catch (Exception e) {
            e.printStackTrace();
         } 
      } 
      try {
         File dir = new File(f.getParentFile(), f.getName());
         PrintpWriter pWriter = new PrintpWriter(dir);
         pWriter.print("writing anything...");
         pWriter.close();
      } catch (FileNotFoundException e) {
         e.printStackTrace();
      } 
   }
}

The above code sample will produce the following result (if the file "java.txt" exists in 'C' drive).

true