How to write a string into a file in java

Question

Say i hv a string named str.......plz give the total code of creating a file and writing the string into it

Answer 1

This is the function where i am trying to write a file....i hv highlighted the regions where file writing codes are used........kindly suggest where is my mistake as this code is running but not writing anything.........only the file is getting created but nothing is getting written...aslo i havnt put fw.close() here where in the code should I put it
static void func1(String str) throws IOException
int i=0,j=0,k=1,m=0;
int size1=0,file_size=0;
String str1;
int arr[]= new int[no_of_lines+1];
FileWriter fw;
*try{*
fw=new FileWriter("output.txt");
catch(IOException exc)
System.out.println("Cannot open file");
return;
arr[0]=0;
while(true)
a=svcRand.nextInt(10);
k++;
i=0;
j++;
try{
FileReader fr= new FileReader(str);
BufferedReader br= new BufferedReader(fr);
while((str1=br.readLine()) !=null)
i++;
if(i==a)
file_size=func2(str1,size1);
str1=str1+"\r\n";
fw.write(str1);
catch(FileNotFoundException exc)
System.out.println("File not found");
return;
catch(ArrayIndexOutOfBoundsException exc)
System.out.println("Usage: Showfile file");
return;