Module 7- Writing into File on Mac is not working.

import java.io.FileWriter;
import java.io.IOException;

public class FileRead_Write {

public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
String str1="My Name is Murali and he is good boy";
File f=new File("/Users/muralic/Documents/workspace/Murali.txt");
f.createNewFile(); //File is getting created fine.

//FileWriter fw=new FileWriter(f.getAbsolutePath());
FileWriter fw=new FileWriter("/Users/muralic/Documents/workspace/Murali.txt");
BufferedWriter out=new BufferedWriter(fw);
out.write(str1); //unable to write into the file and also there is warning in line 18,

//Read
FileReader fr=new FileReader("/Users/muralic/Documents/workspace/Murali.txt");
BufferedReader in=new BufferedReader(fr);
String TextinFile="";

while((TextinFile=in.readLine())!=null)
{
System.out.println(TextinFile);
}


}

}