简单数字格式化

package cn.hp.test;

import java.text.DecimalFormat;


public class demo04 {
    public static void main(String[] args) throws Exception {
        //12.3456 要求保留两位
        double d = 12.3456;
        DecimalFormat df = new DecimalFormat("0.00");
        //格式化
        String s = df.format(d);
        System.out.println("s = "+s);

        //解析字符串
         Number n = df.parse("123.23");
         double v = n.doubleValue();
         System.out.println("v = " + v);

        double money = 213212.4654;
        DecimalFormat df2 = new DecimalFormat("000,000.00");
        String s2 = df2.format(money);
        System.out.println("s2 = " + s2);


    }
}