Double output in java

Question

Double output in java

I have:

double s1 = 2.0;
double s2 = 2.3;
double s3 = 2.33,
double s4 = 2.333;

It is required that when displaying the results on the screen:

s1 = 2
s2 = 2.3
s3 = 2.33
s4 = 2.333

The problem is that you need to use one function to all the numbers.

3

java double

Author: Barmaley, 2013-09-30

Source

2 answers

score 8 · Answer 1

Formatting Numeric Print Output

Code on ideone.com

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
    public static void main (String[] args) throws java.lang.Exception
    {
        double s1 = 2.0; 
        double s2 = 2.3; 
        double s3 = 2.33;
        double s4 = 2.333;

        System.out.format("s1 = %.0f%n", s1);
        System.out.format("s2 = %.1f%n", s2);
        System.out.format("s3 = %.2f%n", s3);
        System.out.format("s4 = %.3f%n", s4);
        System.out.format("s1 = %.0f; s2 = %.1f; s3 = %.2f; s4 = %.3f", s1, s2, s3, s4);
    }
}

score 3 · Answer 2

Thank you, I found it myself already) 10 times I went to the first link, but did not read to the end) Here is the code that solved my problem.

import java.text.*;

public class DecimalFormatDemo {

   static public void customFormat(String pattern, double value ) {
      DecimalFormat myFormatter = new DecimalFormat(pattern);
      String output = myFormatter.format(value);
      System.out.println(value + "  " + pattern + "  " + output);
   }

   static public void main(String[] args) {

      customFormat("###,###.###", 123.0);
      customFormat("###,###.###", 123.120);
      customFormat("###,###.######", 123.0);
      customFormat("###,###.######, 123.123120);
   }
}

Result: