Trying to put random strings into a file - string

Question

I am trying to insert random strings into a .txt file. My code is as follows:
import java.util.*;
import java.io.*;
class fileProcessing{
public static void main (String[] args) throws Exception{
letter();
}
public static void letter() throws Exception{
int count = 0;
PrintStream out = new PrintStream(new File("nums.txt"));
while (count < 7 ){
Random rand = new Random();
int randomNum = 97 + rand.nextInt((122 - 97) + 1);
char a = (char)randomNum;
out.print(a);
count++;
}
}
}
I'm trying to put a row of 7 random letters in a .txt file about 400 or so times. My code allows me to put in only a row of 7 letters. I'm not sure how to get the other 399 lines in. Any help would be appreciated. Thanks!

Answer 1

Use a nested loop that contains the loop you have already written. What this does is, after you generate one word, do a new iteration, writing another word in your file.
import java.util.*
import java.io.*;
class FileProcessing
{
public static void main(String[] args) throws IOException
{
letters();
}
public static void letters() throws IOException
{
int count;
PrintStream out = new PrintStream(new File("nums.txt"));
/*Outer loop. When the loop on the inside finishes generating
*a word, this loop will iterate again.
*/
for(int i=0; i<400; ++i)
{
count=0;
/*your current while loop*/
while (count < 7)
{
Random rand = new Random();
int randomNum = 97 + rand.nextInt((122-97)+1);
char a = (char) randomNum;
out.print(a);
count++;
}
//print new line so all words are in a separate line
out.println();
}
//close PrintStream
out.close();
}
}
Learn more on nested loops here: http://www.javawithus.com/tutorial/nested-loops