Chapter 17, Problem 17.1PE

(Create a text file) Write a program to create a file named Exercisce17_01.txt if it does not exist. Append new data to it if it already exists. Write 100 integers created randomly into the file using text I/O. Integers are separated by a space.

Program Plan Intro

Create a text file

Program Plan:

• Declare the class “writeText”.
• Definition for main class.
  • Create an object to “PrintWriter” to create a new file named “Exercise17_01.txt”.
  • For loop to iterate till 100.
  • Write the 100 randomly generated integers to the file.

Program Description Answer

Program to create a file named “Exercise17_01.txt” to write 100 integers randomly to the created text file.

Explanation of Solution

Program:

//Import required packages

import java.io.*;

import java.util.*;

//Definition for class "writeText"

public class WriteText {

// Definition for main class

public static void main(String[] args) throws IOException {

// Try block

try (

/* Create an object for printWriter to write output to the text file */

PrintWriter out = new PrintWriter(new FileOutputStream(

"Exercise17_01.txt", true));)

{

// Loop to iterate

for (int j = 0; j < 100; j++)

// Generate the random number

out.print((int) (Math.random() * 100000) + " ");

}

}

}

Sample Output

Screenshot of the file “Exercise17_01.txt”