Question

Write a complete Java program in a file caled Module1Progrom.java that reads all the tokens from a file named dota.txt that is to be found in the same directory as the running program. The program should ignore al tokens that cannot be read as an integer and read only the ones that can. After reading all of the integers, the program should print all the integers back to the screen, one per line, from the smalest to the largest. For example if data.txt contains 18 5five 10 1.5 2 2.0 20 Then your program should print to the screen 10 10 20 f the file does not exist, then your program should instead print Fie not found" and exit. Your program should start by allocating an array of size 8 and NI it with the fhrst 8 tokens. On the ninth token, it should replace the array with one of sze 16 and copy all the integers already read. On the 17th token, it should replace the array with one of size 32 and copy all the ntegers already read. Etc. Since this doubling the size of an array is a repeated operation that is easly factored into a coherent chunk, you should write a method that performs this task A little starter code: Program that reads tokens from file data.txt and prints the integer tokens found in it to the screen in increasing order Bauthor Your Nome (your chosen 4-digit ID) version date of suberission public class Module1Progran Allocates and returns an integer array twice the size of the one supplied as a paraneter. The first half of the new array will array will be zeros Eparom arr the array to be copied + be a copy of the supplied array and the second half of the new Breturn array twice the size of <ttorr/tts with its initial elements copied fron ettsarre/tts ethrows NullPointerException if <ttarrttb is null public static int doubleArrayAndCopyCintarr) public static void main(String args) int data-new int[8]: data doubleArrayAndCopy (data);

Answer 1

import java.io.File;

import java.io.FileNotFoundException;

import java.util.Arrays;

import java.util.Scanner;

public class Module1Program {

public static void main(String[] args) {

int size = 8;

int arr[] = new int[size];

File file = new File("input.txt");

Scanner sc;

try {

sc = new Scanner(file);

} catch (FileNotFoundException e) {

System.out.println("File does not exist");

return;

}

int index = 0;

// reads data from file

while (sc.hasNextLine()) {

int i = sc.nextInt();

arr[index++] = i;

if (index >= size) {

arr = doubleSize(arr, size);

size = size * 2;

}

//System.out.println(i);

}

Arrays.sort(arr); // sort the array

// prints array elements

for (int i = size-index; i < size; i++)

System.out.println(arr[i]);

sc.close();

}

// doubles the array size and copies all old elements to new array

private static int[] doubleSize(int[] aArr, int aSize) {

int temp[] = new int[aSize * 2];

for (int i = 0; i < aArr.length; i++)

temp[i] = aArr[i];

return temp;

}

}

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