java.text.DecimalFormat df = new java.text.DecimalFormat("#0.##");
double d=3.14159;
System.out.println(df.format(d));
java.math.BigDecimal bd = new java.math.BigDecimal("3.14159265");
bd = bd.setScale(2,BigDecimal.ROUND_HALF_UP);
class Test{
public static void main(String se77en[]){
double ret = convert(3.14159);
System.out.println(ret);
}
static double convert(double value){
long l1 = Math.round(value*100); //四舍五入
double ret = l1/100.0; //注意:使用100.0而不是100
return ret;
}
}
double d = 3.14159;
d = (double)((int)(d*100+0.5))/100;
第五种
double f = 1.1111;
Double d = Double.valueOf(String.format("%.02f", f));
System.out.println(d);