Reading a text file of ints and printing it onto the screen

Question

        while(kb.hasNext())
        {
           array[i] = kb.nextInt();

           System.out.print(array[i] + " ");
        }

I'm reading a text file containing

1 2 3

2 1 3

3 1 2

1 2 3

2 1 3

3 1 2

I'm trying to print it out the same way it is formatted in the text file but I can only print it out like this.

1 2 3 2 1 3 3 1 2 1 2 3 2 1 3 3 1 2

First time asking a question on here so I apologize if it's not clear or poorly worded.

diplicate answer http://stackoverflow.com/questions/16104616/using-bufferedreader-to-read-text-file — Musaddique S, Feb 25 '16 at 05:41

Scary Wombat · Accepted Answer · 2016-02-25T05:49:33.913

5

How about

int count = 0;
while(kb.hasNext()) {
    int i = kb.nextInt();
    if (count++ % 3 == 0) 
        System.out.println(i + " ");
    else 
        System.out.print(i + " ");
}

or if lines were difference length then

while (kb.hasNext ()) {

    String in = kb.nextLine ();

    // either 
    // just print it
    System.out.println(in);

    // or split it and iterate
    String arr[] = in.split (" ");
    for (String i : arr) {
       System.out.print(i + " ");
    } 
    System.out.println(" ");
}

edited Feb 25 '16 at 05:49

answered Feb 25 '16 at 05:41

Scary Wombat

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1

if (count++ % 3) it will not return true. compiler error – Musaddique S Feb 25 '16 at 05:44
@TipuSultan Sorry too much haste – Scary Wombat Feb 25 '16 at 05:45
I guess that would work. But what if each line has a different length? – D. Moua Feb 25 '16 at 05:45
@D.Moua it is java not C and C++ – Musaddique S Feb 25 '16 at 05:46
Better to use `hasNextInt` instead of `hasNext` in first case. – akash Feb 25 '16 at 06:02
@ScaryWombat thanks alot. It's printing properly now. – D. Moua Feb 25 '16 at 06:13

score 1 · Answer 2 · answered Feb 25 '16 at 05:39

1

Use System.out.println which will print new line at the end but System.out.print just print the line.

answered Feb 25 '16 at 05:39

seenukarthi

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If I use println then it just prints like this. One int per line, but this post is just making it all on one line. 1 2 3 2 1 3 3 1 2 1 2 3 2 1 3 3 1 2 – D. Moua Feb 25 '16 at 05:42
Check @Scray Wombat answer. – seenukarthi Feb 25 '16 at 05:43

score 0 · Answer 3 · answered Feb 25 '16 at 20:20

I figured out what I was doing wrong. But this is what I ended up doing.

        while (kb.hasNextInt()) 
        {          
           String in = kb.nextLine ();
           System.out.println(in + " ");
        }
        System.out.println(" ");

Reading a text file of ints and printing it onto the screen

3 Answers3