Java string formatting issue

Question

while(count <= maxNum){
     System.out.println("O-------O");
     System.out.printf("|" + "%8s", count + "|");
     System.out.println("O-------O");
     count++;
     startTime = System.currentTimeMillis();
     //an empty loop! does nothing except keeps checking the continuation condition
     //continues as long as the time that has passed is less than millisToWait
     while(System.currentTimeMillis() - startTime < millisToWait);
  System.out.println("O-------O");

Above is the part of code that conecerns the actual output of what I am trying to achieve. The code, for the most part works as intended, except the output(below is the output attached as an image) is not 100% correct. There is an extra "O-------O" to the right of every number.

Here's the output

Correct me if I'm wrong, but I believe it has something to do with the first println statement, but I'm still not sure how it's printing once on top and then once to the side. Any help is appreciated.

Henrykvdb · Accepted Answer · 2017-02-19 23:14:20Z

1

Printf doesn't automaticly add a newline, you have to do that manually by adding a newline character into the string. We use %n instaid of \n for portability reasons. The format can also be simplified.

Change the third line to:

System.out.printf("|%8s%n|", count);

edited Feb 19, 2017 at 23:14

answered Feb 19, 2017 at 23:02

Henrykvdb

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2 Comments

Jodhanveer Ghangheri Over a year ago

Wow. That one modification fixed it. Thank you so much.

Henrykvdb Over a year ago

@shmosel Thanks, I added it into the answer.

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