This example shows how to check for the existence of a file using the file.exists()
method of the File class.
Example 1:
package com.yiibai; import java.io.File; public class FileExistence { public static void main(String[] args) { File file = new File("F:/worksp/javaexamples/java_files/myfile.txt"); System.out.println(file.exists()); } }
Executing the above example code will produce the following results-
trueShell
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Example 2:
package com.yiibai; import java.io.File; import java.io.FileNotFoundException; import java.io.IOException; import java.io.PrintWriter; import java.nio.file.FileAlreadyExistsException; import java.nio.file.Files; import java.nio.file.Path; import java.nio.file.Paths; public class FileExistence2 { 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()); PrintWriter pWriter = new PrintWriter(dir); pWriter.print("writing anything..."); pWriter.close(); } catch (FileNotFoundException e) { e.printStackTrace(); } } }
Executing the above example code will produce the following results:
falseShell
Run it again and the result returned will be:
true
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