java only displays doubles to 1 decimal place code example

Example 1: specify decimal places java

double test = 12.15;
DecimalFormat df = new DecimalFormat("#.0");
System.out.println(df.format(test)); // Console: 12.2
// # - prints a digit if provided, nothing otherwise
// . - indicates where to put the decimal seperator
// 0 - prints a digit if provided, 0 otherwise

Example 2: how to set 2 decimal places in java

DecimalFormat df = new DecimalFormat();
df.setMaximumFractionDigits(2);
System.out.println(df.format(decimalNumber));