Question

Here is my java code. It works and has the correct output, but I need to add a file and I am not sure how. I cannot use the FileNotFoundException. Please help!

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Exercise {

public static void main(String[] args) {

Scanner input=new Scanner(System.in);
int[] WordsCharsLetters = {0,0,0};
while(input.hasNext())
{
String sentence=input.nextLine();
if(sentence!=null&&sentence.length()>0){
WordsCharsLetters[0] += calculateAndPrintChars(sentence)[0];
WordsCharsLetters[1] += calculateAndPrintChars(sentence)[1];
WordsCharsLetters[2] += calculateAndPrintChars(sentence)[2];
}
else
break;
}
input.close();
System.out.println("Words: " + WordsCharsLetters[0]);
System.out.println("Characters: " + WordsCharsLetters[1]);
System.out.println("Letters: " + WordsCharsLetters[2]);

}
static int[] calculateAndPrintChars(String sentence)
{
int[] WCL = new int[3];
String[] sentenceArray=sentence.split(" ");
WCL[0] = sentenceArray.length;
int letterCount=0;
for(int i=0;i<sentence.length();i++)
{
if(Character.isLetter(sentence.charAt(i)))
letterCount++;
}
WCL[1] = sentence.length();
WCL[2] = letterCount;
return WCL;
}

}

Answer 1

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class Exercise {

        public static void main(String[] args) throws Exception{
                String fileName="input.txt";
                // we need to pass file name to the Scanner
                Scanner input = new Scanner(new File(fileName));
                int[] WordsCharsLetters = { 0, 0, 0 };
                while (input.hasNext()) {
                        String sentence = input.nextLine();
                        if (sentence != null && sentence.length() > 0) {
                                WordsCharsLetters[0] += calculateAndPrintChars(sentence)[0];
                                WordsCharsLetters[1] += calculateAndPrintChars(sentence)[1];
                                WordsCharsLetters[2] += calculateAndPrintChars(sentence)[2];
                        } else
                                break;
                }
                input.close();
                System.out.println("Words: " + WordsCharsLetters[0]);
                System.out.println("Characters: " + WordsCharsLetters[1]);
                System.out.println("Letters: " + WordsCharsLetters[2]);

        }

        static int[] calculateAndPrintChars(String sentence) {
                int[] WCL = new int[3];
                String[] sentenceArray = sentence.split(" ");
                WCL[0] = sentenceArray.length;
                int letterCount = 0;
                for (int i = 0; i < sentence.length(); i++) {
                        if (Character.isLetter(sentence.charAt(i)))
                                letterCount++;
                }
                WCL[1] = sentence.length();
                WCL[2] = letterCount;
                return WCL;
        }

}

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