CODEWITHSUNDEEP
javafile
way245
way245

Reputation: 47

How to display the output of a file on one line with commas?

Code is here:

https://pastebin.com/08KBcnUX

Here is my current output:

OUTPUT:

Integer Array Contents: 
, -3, 2, 0, 0, 1, -5
Total odd numbers: 3
Odd numbers are: -3 1 -5 0 0 0 
Index of last zero: 3
Minimum: -5
Maximum: 2
Sum: -5
Element mean is: 0.0
//1) How do I get rid of the random "," at the beginning? Lol 
//2) How do I get rid of the 0's that are in the "Odd numbers are: " category. 
//3) Mean's not working. What should I do to fix that. Maybe it has something to do     
//with the extra zeroes? I made it into a double and that didnt do anything either.

Upvotes: 0

Views: 75

Answers (3)

Jacob G.
Jacob G.

Reputation: 29700

An easier way to accomplish this would be to utilize Files#readAllLines which reads every line of a File into a List<Stirng>. Then, you can use String#join to easily combine every String with a comma as a delimiter.

List<String> lines = Files.readAllLines(file.toPath());

String fileContents = String.join(",", lines);

If you want to return the total number of true elements, simply Stream the List<String> and filter out the elements that are equal to true, and finally use Stream#count to get the amount:

long numTrueElements = lines.stream().filter(s -> s.equals("true")).count();

If you want to return the total number of false elements, simply subtract the total number of true elements from the size of the List<Stirng> of lines.

int numFalseElements = lines.size() - numTrueElements;

If you want the index of the first true element, then you can use List#indexOf:

int firstTrueIndex = lines.indexOf("true");

With this method, you can ditch the Scanner and any loop entirely.

Upvotes: 1

Youcef LAIDANI
Youcef LAIDANI

Reputation: 59988

You can use System.out.print instead with a comma like this:

int trues = 0;
int falses = 0;
int firstindex = -1;//first index init with -1 to check with it later
String del = "";
int i = 0;
while (scan.hasNextLine()) {
    String line = scan.next();
    if (line.equals("true")) {//if the line equal true then trues++;
        if (firstindex == -1) {//if the first index == -1 then assign 
                               //it to i number of words
            firstindex = i;
        }
        trues++;
    } else if (line.equals("false")) {//if the line equal false falses++
        falses++;
    }
    System.out.print(del + line);
    del = ",";
    i++;
}
System.out.println();
System.out.println("Total TRUEs: " + trues);
System.out.println("Total TRUEs: " + falses);
System.out.println("Index of first TRUE: " + 
                      (firstindex > -1 ? firstindex : "No true in file"));

(firstindex > -1 ? firstindex : "No true in file") mean if the input == -1 print No true in file else print the index

Output

Welcome to the Info-Array Program!
Please enter the filename for the Boolean values: Boolean Array Contents: 
true,true,false,true,false,true
Total TRUEs: 4
Total TRUEs: 2
Index of first TRUE: 0

Upvotes: 0

Jay Smith
Jay Smith

Reputation: 2480

String line=null;
while (scan.hasNextLine()) {
            line += scan.nextLine()+",";
        }
        System.out.println("Boolean Array Contents: "+line);
int count = line.split(",").length;

Upvotes: 0

Related Questions