Revisions to How do I create a file and write to it?

Copy edited. Removed meta information (this belongs in comments).

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edited Jan 14, 2017 at 15:57

31.4k
22
110
134

This may help.

toTo create file without overwriting existing file:

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);

try {
    //System.out.println(f);
    boolean flag = file.createNewFile();
            
    if(flag == true) {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    /* orOr use exists() function as follows:
        if(file.exists() == true) {
            JOptionPane.showMessageDialog(rootPane, "File already exists");
        }
        else {
            JOptionPane.showMessageDialog(rootPane, "File created successfully");
        }
    */
}
catch(Exception e) {
     //any Any exception handling method of your choice
}

This may help.

to create file without overwriting existing file

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);

try {
    //System.out.println(f);
    boolean flag = file.createNewFile();
            
    if(flag == true) {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    /* or use exists() function as follows:
    if(file.exists() == true) {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    } */
}
catch(Exception e) {
     //any exception handling method of your choice
}

To create file without overwriting existing file:

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);

try {
    //System.out.println(f);
    boolean flag = file.createNewFile();

    if(flag == true) {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    /* Or use exists() function as follows:
        if(file.exists() == true) {
            JOptionPane.showMessageDialog(rootPane, "File already exists");
        }
        else {
            JOptionPane.showMessageDialog(rootPane, "File created successfully");
        }
    */
}
catch(Exception e) {
    // Any exception handling method of your choice
}

Improved readability of code

Source Link

edit approved Jul 14, 2015 at 11:45

Ian2thedv

2.7k
2
28
47

This may help.

to create file without overwriting existing file

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);
    try 
   try {
        //System.out.println(f);
        boolean flag = file.createNewFile();
        
      
    if(flag==true)
     flag == true) {
            JOptionPane.showMessageDialog(rootPane, "File created successfully");
        }
        else
        {
            JOptionPane.showMessageDialog(rootPane, "File already exists");
        }
        /* or use exists() function as follows:
            if(file.exists()==true)
          == true) {
                JOptionPane.showMessageDialog(rootPane, "File already exists");
            }
            else
            {
                JOptionPane.showMessageDialog(rootPane, "File created successfully");
            }
         
        */
    }
    
    catch(Exception e)
    {
        //any exception handling method of your choice
    }

This may help.

to create file without overwriting existing file

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);
    try 
    {
        //System.out.println(f);
        boolean flag = file.createNewFile();
        
         if(flag==true)
        {
            JOptionPane.showMessageDialog(rootPane, "File created successfully");
        }
        else
        {
            JOptionPane.showMessageDialog(rootPane, "File already exists");
        }
        /* or use exists() function as follows:
            if(file.exists()==true)
            {
                JOptionPane.showMessageDialog(rootPane, "File already exists");
            }
            else
            {
                JOptionPane.showMessageDialog(rootPane, "File created successfully");
            }
         
        */
    }
    
    catch(Exception e)
    {
        //any exception handling method of your choice
    }

This may help.

to create file without overwriting existing file

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);

try {
    //System.out.println(f);
    boolean flag = file.createNewFile();
             
    if(flag == true) {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    /* or use exists() function as follows:
    if(file.exists() == true) {
        JOptionPane.showMessageDialog(rootPane, "File already exists");
    }
    else {
        JOptionPane.showMessageDialog(rootPane, "File created successfully");
    } */
}
catch(Exception e) {
     //any exception handling method of your choice
}

Source Link

answered Jun 29, 2014 at 12:48

aashima

1.2k
12
32

This may help.

to create file without overwriting existing file

System.out.println("Choose folder to create file");
JFileChooser c = new JFileChooser();
c.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
c.showOpenDialog(c);
c.getSelectedFile();
f = c.getSelectedFile(); // File f - global variable
String newfile = f + "\\hi.doc";//.txt or .doc or .html
File file = new File(newfile);
    try 
    {
        //System.out.println(f);
        boolean flag = file.createNewFile();
        
        if(flag==true)
        {
            JOptionPane.showMessageDialog(rootPane, "File created successfully");
        }
        else
        {
            JOptionPane.showMessageDialog(rootPane, "File already exists");
        }
        /* or use exists() function as follows:
            if(file.exists()==true)
            {
                JOptionPane.showMessageDialog(rootPane, "File already exists");
            }
            else
            {
                JOptionPane.showMessageDialog(rootPane, "File created successfully");
            }
         
        */
    }
    
    catch(Exception e)
    {
        //any exception handling method of your choice
    }

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