numberutil.java

cwbbs 云网论坛源码

package cn.js.fan.util;

import java.text.DecimalFormat;


public class NumberUtil {
  public NumberUtil() {
  }

  
  public static String round(double v,int scale) {
    
    
    
    String temp = "##0.";
    for (int i = 0; i < scale; i++) {
      temp += "0";
    }
    DecimalFormat d = new DecimalFormat(temp);
    return d.format(v);
  }

  
  public static String roundRMB(double v) {
    String temp = "##0.00";
    DecimalFormat d = new DecimalFormat(temp);
    return d.format(v);
  }

  
  public static String roundRMB2Feng(double v) {
    
    String temp = "##0.";
    DecimalFormat d = new DecimalFormat(temp);
    d.setDecimalSeparatorAlwaysShown(false);
    return d.format(v*100);
  }

  
  public static int random(int a, int b) {
      return (int)((b-a)*Math.random() + a);
  }

  public static long random(long a, long b) {
      return (long)((b-a)*Math.random() + a);
  }
}