format decimals java code example

Example 1: java string format 2 decimal places

String strDouble = String.format("%.2f", 1.23456);

DecimalFormat df = new DecimalFormat("#.##");
String formatted = df.format(2.456345); 
System.out.println(formatted);

Example 2: java double format

NumberFormat formatter = new DecimalFormat("#0.00");     
System.out.println(formatter.format(4.0));

Example 3: java decimalformat

String pattern = "###,###.###";
DecimalFormat decimalFormat = new DecimalFormat(pattern);