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Formatting number length

2 replies on 1 page. Most recent reply: Jul 25, 2002 4:05 AM by thomas

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Jenga

Posts: 3
Nickname: topazz
Registered: Jul, 2002

Formatting number length Posted: Jul 24, 2002 4:20 AM
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I have a quick question. I have developed a program to find square roots and display the results in a table. I would like the square root to be only 4 decimal places, example 5.8792 not 5.879234521. How can i control the number of decimal places?


thomas

Posts: 42
Nickname: turbomanic
Registered: Jul, 2002

Re: Formatting number length Posted: Jul 24, 2002 8:45 AM
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use the DecimalFormat class. We use that in university so I say it is available in all java libaries.

write this:
DecimalFormat largenumber= new DecimalFormat("0.####");
Final double start=5.879234521;
double answer= largenumber.format(start);
//answer should now only have 4 decimal places
//like you wanted

thomas

Posts: 42
Nickname: turbomanic
Registered: Jul, 2002

Re: Formatting number length Posted: Jul 25, 2002 4:05 AM
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I forgot to mention you must import java.text.* to use decimalformat class.

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