java round double to 2 decimal places

1String result = String.format("%.2f", value);

1package com.mkyong;
2
3import java.math.RoundingMode;
4import java.text.DecimalFormat;
5
6public class DecimalExample {
7
8    private static DecimalFormat df2 = new DecimalFormat("#.##");
9
10    public static void main(String[] args) {
11
12        double input = 3.14159265359;
13        System.out.println("double : " + input);
14        System.out.println("double : " + df2.format(input));    //3.14
15
16        // DecimalFormat, default is RoundingMode.HALF_EVEN
17        df2.setRoundingMode(RoundingMode.DOWN);
18        System.out.println("\ndouble : " + df2.format(input));  //3.14
19
20        df2.setRoundingMode(RoundingMode.UP);
21        System.out.println("double : " + df2.format(input));    //3.15
22
23    }
24
25}
26Copy

1double roundOff = Math.round(a * 100.0) / 100.0;
2// Or
3double roundOff = (double) Math.round(a * 100) / 100;
4// both have the same output.

1class round{
2    public static void main(String args[]){
3
4    double a = 123.13698;
5    double roundOff = Math.round(a*100)/100;
6
7    System.out.println(roundOff);
8}
9}
10

1import java.math.RoundingMode;
2import java.text.DecimalFormat;
3
4public class DecimalExample {
5    private static DecimalFormat df = new DecimalFormat("0.00");
6    public static void main(String[] args) {
7        double input = 1205.6358;
8      
9        System.out.println("salary : " + input);
10      
11        // DecimalFormat, default is RoundingMode.HALF_EVEN
12        System.out.println("salary : " + df.format(input));      //1205.64
13        
14        df.setRoundingMode(RoundingMode.DOWN);
15        System.out.println("salary : " + df.format(input));      //1205.63
16
17        df.setRoundingMode(RoundingMode.UP);
18        System.out.println("salary : " + df.format(input));      //1205.64
19    }
20}

1int a = (int) Math.round(doubleVar);