Java强制保留两位小数的四种方法案例详解

double f = 111231.5585;

System.out.println(String.format("%.2f", f));

double f = 111231.5585;

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

System.out.println(df.format(f));

double f = 111231.5585;

BigDecimal bg = new BigDecimal(f);

double f1 = bg.setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();

System.out.println(f1);

double f = 111231.5585;

NumberFormat nf = NumberFormat.getNumberInstance();

nf.setMaximumFractionDigits(2);

System.out.println(nf.format(f));