how to round the answer in two decimal point

Question

I have simple math example Add, Substract, Divide and Multiply and using variable as double and want answer should be in two decimal point if I use decimals to add substract divide or multiply.

    private void jButton_addActionPerformed(java.awt.event.ActionEvent  
    evt)    {                                            

    double First = Double.parseDouble(jTextField1.getText());
    // Read the Second number
    double Second = Double.parseDouble(jTextField2.getText());
    // Set the Result
    double Result = First + Second;

    jLabel4.setText(String.valueOf(Result));
     }                                           

    private void jButton_substractActionPerformed
   (java.awt.event.ActionEvent evt)   
   {                                                  

    double First = Double.parseDouble(jTextField1.getText());
   // Read the Second number
   double Second = Double.parseDouble(jTextField2.getText());
   // Set the Result
   double Result = First - Second;


   jLabel4.setText(String.valueOf(Result));
   }                                                 

    private void jButton_MultiplyActionPerformed  
   (java.awt.event.ActionEvent  evt)   
   {                                                 

    double First = Double.parseDouble(jTextField1.getText());
    // Read the Second number
    double Second = Double.parseDouble(jTextField2.getText());
    // Set the Result
    double Result = First * Second;


    jLabel4.setText(String.valueOf(Result));

  }                                                

   private void jButton_divideActionPerformed(java.awt.event.ActionEvent 
    evt)   {                                               

    double First = Double.parseDouble(jTextField1.getText());
    // Read the Second number
    double Second = Double.parseDouble(jTextField2.getText());
    // Set the Result
    double Result = First / Second;


    jLabel4.setText(String.valueOf(Result));
    }

How to get result rounded to two decimal Points like 12.38 instead of 12.379999

possible duplicate of [How to round a number to n decimal places in Java](http://stackoverflow.com/questions/153724/how-to-round-a-number-to-n-decimal-places-in-java) — Glorfindel, Jul 12 '15 at 17:54
There are several other questions in Stack Overflow which should provide you with a solution. — deezy, Jul 12 '15 at 18:21

score 0 · Answer 1 · answered Jul 12 '15 at 18:33

0

use setRoundingMode to tell it how many decimal points you want.

answered Jul 12 '15 at 18:33

Antflga

624
1
6
9

score -1 · Accepted Answer · answered Jul 12 '15 at 17:56

-1

You can do this by

double round = Math.round(number * 100.0) / 100.0;

where number is your decimal number

To break it down -

double number = 3.14159;
number = Math.round(number * 100);
number = number/100;

The output will be 3.14

answered Jul 12 '15 at 17:56

Siddharth Thevaril

3,722
3
35
71

how to round the answer in two decimal point

2 Answers2