java double to string with 2 decimals

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 d = 5.921763;
2
3DecimalFormat df = new DecimalFormat("#.00");
4String string = df.format(d);
5
6// string = "5.92"

1double input = 3.14159265359;
2System.out.format("double : %.2f", input); // 3.14
3System.out.println("double : " + String.format("%.2f", input)); // 3.14

1DecimalFormat df = new DecimalFormat("#.00"); 

1double res = Math.round(a * 100) / 100;

1printf(%.2f);