double x1 = 0.026;

System.out.println(String.format("%.2f", x1));

//方案一:

get_double = (double)(Math.round(result_value*100)/100.0)

//方案二:

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

get_double = Double.ParseDouble(df.format(result_value));

//方案三:

get_double = Double.ParseDouble(String.format("%.2f",result_value));

//方案四:

BigDecimal bd = new BigDecimalresult_value();

BigDecimal  bd2 = bd.setScale(2,BigDecimal  .ROUND_HALF_UP);

get_double = Double.ParseDouble(bd2.ToString());

double d = 13.4324;

d=((int)(d*100))/100;