java how to use printf

Question

I am trying to use printf to display something like this:

Temperature: # # # # # # # # # # # #

but when I run my program, I get this:

Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:Temperature:
  69.0      67.0      66.0      64.0      66.0      69.0      67.0      67.0      70.0      69.0      69.0      70.0

Here is a snippet of my code:

System.out.printf("Temperature:", "%10.1f", temperature);

Any help will be greatly appreciated.

System.out.printf("Temperature: %10.1f", temperature); ?

user180100
– user180100

2013-11-13 17:51:19 +00:00
Commented Nov 13, 2013 at 17:51 — user180100
– user180100, Commented Nov 13, 2013 at 17:51

Changgeng · Accepted Answer · 2013-11-13 17:51:38Z

1

It should be something like

System.out.printf("Temperature %10.1f\n", temperature)

answered Nov 13, 2013 at 17:51

Changgeng

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1 Comment

Cruncher Over a year ago

this does not give the expected Temperature: # # # # # # # # # # # # format

Shreyos Adikari · Accepted Answer · 2013-11-13 17:53:38Z

0

Not sure that you are using a loop or not.

If you are using for loop then write System.out.print("Temperature:"); outside the loop.
then inside the loop you can write System.out.print(temperature+"\t");

answered Nov 13, 2013 at 17:53

Shreyos Adikari

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Comments

pjhamilton4 · Accepted Answer · 2013-11-13 18:10:08Z

0

There are a number of ways to do this depending on what you want.

If you are using a Collection to store the temperatures, you can iterate through them and print each temp with a space or tab between them.

System.out.print("Temperature: ");
for(int temp: temps)
{
    System.out.print(temp + " ");
}

If you don't care too much about the format of the output you could do the following:

System.out.printf("Temperature: %s", Arrays.toString(temperature.toArray()));

That will give you this:

Temperature: [10.0, 15.0, 20.0]

The last answer will of course only work in situations where your objects have a toString() implementation.

answered Nov 13, 2013 at 18:10

pjhamilton4

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Comments

JEuvin · Accepted Answer · 2013-11-13 18:18:08Z

0

Why not do something like:

String temp = "";

for (strintg s : Temperature){
     temp+= s + " "; }

System.out.printf("Temperature: " + temp);

Pass all the info from the temperature array into a string ahead of time and then print it out as one string.

answered Nov 13, 2013 at 18:18

JEuvin

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