import java.math.BigDecimal;
public class Test{
???? public static void main(String args[]){
???? float tax = 4.85993;
???? BigDecimal value = new BigDecimal(tax);
???? // 保留小數點2位
???? float actualTax = value.setScale(2, BigDecimal.ROUND_HALF_UP).floatValue();
???? System.out.println(actualTax);
??? }
}