Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.math.BigDecimal;
import java.text.DecimalFormat;
import java.text.NumberFormat;

import java.util.Locale;

public class Main {
    /**
     * Str format.
     * 
     * @param v
     *            the v
     * @return the string
     */
    public static String strFormat(String v) {
        if (v == null) {
            return "0.00";
        }
        double dv = Double.parseDouble(v);
        DecimalFormat nf = new DecimalFormat("#.##");
        nf.applyPattern("0.00");
        return nf.format(dv);
    }

    /**
     * Str format.
     * 
     * @param v
     *            the v
     * @return the string
     */
    public static String strFormat(double v) {
        double sv = round(v, 2);
        NumberFormat nf = NumberFormat.getInstance(Locale.getDefault());
        return nf.format(sv);
    }

    /**
     * Parses the double.
     * 
     * @param str
     *            the str
     * @return the double
     */
    public static double parseDouble(String str) {
        if (str == null) {
            str = "0";
        }
        return Double.parseDouble(str);
    }

    public static double round(double v, int scale) {
        if (scale < 0) {
            throw new IllegalArgumentException("The scale must be a positive integer or zero");
        }
        BigDecimal b = new BigDecimal(Double.toString(v));
        BigDecimal one = new BigDecimal("1");
        return b.divide(one, scale, BigDecimal.ROUND_HALF_UP).doubleValue();
    }
}