Examples of java.io.File.createNewFile()

java.io.File.createNewFile()
Creates the file specified by this File. If the file already exists this method returns false. Otherwise, if the file is created successfully, the result is true. An IOException will be thrown if the directory to contain this file does not exist. @return true if this File was created, falseotherwise. @throws IOException if an I/O error occurs or the directory does not exist. @see java.lang.SecurityManager#checkWrite(FileDescriptor)


public class DeleteOnCloseFileInputStreamTest extends TestCase {
  public void testIt() throws Exception {
    String property = System.getProperty("java.io.tmpdir");
    File tempFile = new File(property, getClass().getName());
    assertTrue(tempFile.createNewFile());
    DeleteOnCloseFileInputStream is = new DeleteOnCloseFileInputStream(tempFile);
    is.close();
    assertFalse("file was not deleted.", tempFile.exists());
  }
}

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        if (outputFile != null) {
            File oFile = new File(outputFile);
            
            try {
                if(!oFile.exists()){
                    oFile.createNewFile();
                }
                if (oFile.canWrite()) {
                    outWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(oFile)));
                }
            } catch (FileNotFoundException e) {

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        }
        if (errFile != null) {
            File eFile = new File(errFile);
            try {
                if(!eFile.exists()){
                    eFile.createNewFile();
                }
                if (eFile.canWrite()) {
                    errWriter = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(eFile)));
                }
            } catch (FileNotFoundException e) {

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    }
    // So, f is a file
    if (dest.isDirectory()) {
      // Create a new file of that name in the empty directory
      File newFile = new File(dest, src.getName());
      newFile.createNewFile();
      // Use copy in the last case : file to file
      copy(src,newFile);
      return;
    }
    try {

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      first_run = true;
      
      try {
      
        config_file.createNewFile();
      
      } catch( Throwable cause ) {
        
        throw new JMuleCoreException( cause );

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         File lock = null;
         String lockName = null;
         if (this.lockExtention != null) {
            lockName = fileName + this.lockExtention;
            lock = new File(dir, lockName);
            lock.createNewFile();
         }
         log.info("storing file '" + fileName + "' on directory '" + dir + "'");


         File[] files = null;
         long numChunks = 0L;

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      // now some which should fail:
      // existing file but not a directory
      File file = new File(this.dirName);
      try {
         file.createNewFile();
      }
      catch (IOException ex) {
         assertTrue("could not create the file '" + this.dirName + "'", false);
      }

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      try {
         file = new File(this.dirName);
         boolean ret = file.mkdir();
         assertTrue("could not create directory '" + this.dirName + "'", ret);
         file = new File(this.dirNameSent);
         file.createNewFile();
      }
      catch (IOException ex) {
         assertTrue("could not create the file '" + this.dirNameSent + "'", false);
      }

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      try {
         File lock = null;
         if (lockExt != null) {
            String tmp = filename + lockExt.substring(1);
            lock = new File(tmp);
            boolean ret = lock.createNewFile();
            assertTrue("could not create lock file '" + tmp + "'", ret);
            int upd = this.updateInterceptor.waitOnUpdate(timeToWait);
            assertEquals("when writing lock file should not update", 0, upd);
         }
         else

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      // now some which should fail:
      // existing file but not a directory
      File file = new File(this.pollerDirName);
      try {
         file.createNewFile();
      }
      catch (IOException ex) {
         assertTrue("could not create the file '" + this.pollerDirName + "'", false);
      }

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