Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.math.BigDecimal;

public class Main {

    public static String keepNSecimal(String numberStr, int n) {
        double number = Double.parseDouble(numberStr);
        BigDecimal b = new BigDecimal(number);
        String ss = b.setScale(n, BigDecimal.ROUND_HALF_UP).doubleValue() + "";
        int pointIndex = ss.lastIndexOf(".");
        int fractionCount = ss.length() - pointIndex - 1;
        for (int i = 0; i < n - fractionCount; i++) {
            ss += 0;
        }
        return ss;
    }
}