Appending a file using i/o

Question

import java.io.Console;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.Writer;
import java.io.IOException;
import java.io.File;
class appendfilewritter
public static void main(String args[]) throws IOException
Console c=System.console();
File f=new File("appendmytxt.txt");
PrintWriter out=new PrintWriter(f);
try
if(c==null)
System.out.println("Console is NULL");
System.exit(1);
String str;
str=c.readLine("Enter the string:");
if(f.exists())
out.append(str);
else
f.createNewFile();
System.out.println("File created");
out.println(str);
System.out.println("Your Text is written in file");
catch(IOException e)
System.out.println("Exception:"+e);
finally
he
if(out!=null)
out.close();
When we compile this code the respective .txt file is generated and text given is written in the file.Now if i had to append more text in the file then during runtime a new file is generated which overwrite the former file...

Answer 1

Take a look at the constructors of [http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html|http://java.sun.com/j2se/1.4.2/docs/api/java/io/FileWriter.html] .
P.S. You do not need to use
if(f.exists())
out.append(str);
else
f.createNewFile();
System.out.println("File created");
out.println(str);
}Just open the file in append mode and use it. If the file does not exist it will be created.