Example usage for java.io File createNewFile

Introduction

In this page you can find the example usage for java.io File createNewFile.

Prototype

public boolean createNewFile() throws IOException

Source Link

Document

Atomically creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist.

Usage

From source file:MainClass.java

public static void main(String[] a) throws Exception {
    File file = new File("c:\\test\\test.txt");
    file.createNewFile();
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File("ReadOnly.txt");
    file.createNewFile();
    file.setReadOnly();/*  w  ww  .j a v a  2s. co  m*/

    if (file.canWrite()) {
        System.out.println("writable!");
    } else {
        System.out.println("read only!");
    }
}

From source file:Main.java

public static void main(String[] args) {
    try {/*from w ww  . j  a v  a 2 s . c om*/
        File file = new File("myfile.txt");
        if (file.createNewFile())
            System.out.println("Success!");
        else
            System.out.println("Error, file already exists.");
    } catch (IOException ioe) {
        ioe.printStackTrace();
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File("Writable.txt");
    file.createNewFile();
    file.setReadOnly();// w w w  .j  ava2s.  co m

    if (file.canWrite()) {
        System.out.println("File is writable!");
    } else {
        System.out.println("File is in read only mode!");
    }
    file.setWritable(true);
    if (file.canWrite()) {
        System.out.println("File is writable!");
    } else {
        System.out.println("File is in read only mode!");
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File f = new File("test.txt");

    // create new file in the system
    f.createNewFile();

    // create new file object from the absolute path
    File f1 = f.getAbsoluteFile();

    System.out.println(f1);/*from   w  w  w  . j a v a 2 s. c o m*/

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File file = new File("C://demo.txt");
    boolean blnCreated = false;
    blnCreated = file.createNewFile();
    System.out.println(blnCreated);
}

From source file:Main.java

public static void main(String[] args) throws Exception {

    // create new files
    File f = new File("test.txt");

    // create new file in the system
    f.createNewFile();

    // tests if file exists
    boolean bool = f.exists();

    System.out.println("File exists: " + bool);

}

From source file:Main.java

public static void main(String[] args) throws Exception {
    File f = new File("test.txt");

    // tries to create new file in the system
    boolean bool = f.createNewFile();

    System.out.println("File created: " + bool);

}

From source file:ReadOnly.java

public static void main(String[] a) throws IOException {

    File f = new File("f");

    if (!f.createNewFile()) {
        System.out.println("Can't create new file.");
        return;//from  www.  ja  va2 s  .c  om
    }

    if (!f.canWrite()) {
        System.out.println("Can't write new file!");
        return;
    }

    if (!f.setReadOnly()) {
        System.out.println("Grrr! Can't set file read-only.");
        return;
    }

    if (f.canWrite()) {
        System.out.println("Most immutable, captain!");
        System.out.println("But it still says canWrite() after setReadOnly");
        return;
    } else {
        System.out.println("Logical, captain!");
        System.out.println("canWrite() correctly returns false after setReadOnly");
    }
}

From source file:com.mysql.servlet.NewClass.java

public static void main(String[] args) {

    JSONObject headerFile = new JSONObject();

    JSONArray listOfAttrs = new JSONArray();
    listOfAttrs.add("id" + "");
    listOfAttrs.add("name" + "");
    listOfAttrs.add("age" + "");
    listOfAttrs.add("salary" + "");
    listOfAttrs.add("grade" + "");

    headerFile.put("Employee", listOfAttrs);

    try {/*from w  w  w  . j  a  v a 2 s  .  c  o  m*/

        // Writing to a file  
        File file = new File("D:\\Employees.json");
        file.createNewFile();
        FileWriter fileWriter = new FileWriter(file);
        System.out.println("Writing JSON object to file");
        System.out.println("-----------------------");
        System.out.print(headerFile);

        fileWriter.write(headerFile.toJSONString());
        fileWriter.flush();
        fileWriter.close();

    } catch (IOException e) {
        e.printStackTrace();
    }

}