javaDecimalFormat常用方法詳解

package com.myk.hash;

import java.text.DecimalFormat;

public class App 
{
  public static void main( String[] args )
  {
    //數(shù)字格式化，#和0都是占位符，#：當(dāng)要格式化的數(shù)字位數(shù)不足時#會補空白；0：當(dāng)要格式化的數(shù)字位數(shù)不足時會補0
    DecimalFormat df1 = new DecimalFormat("#.##");//數(shù)字格式化  
    System.out.println(df1.format(0.01));

    DecimalFormat df2 = new DecimalFormat("0.000");//數(shù)字格式化 
    System.out.println(df2.format(0.01));
    //數(shù)字以%的形式展示，小數(shù)轉(zhuǎn)百分比自動轉(zhuǎn)換
    DecimalFormat df3 = new DecimalFormat("#0.000%");//數(shù)字格式化  
    System.out.println(df3.format(0.11));
    //數(shù)字以%的形式展示，小數(shù)轉(zhuǎn)百分比自動轉(zhuǎn)換
    DecimalFormat df4 = new DecimalFormat("#.##%");//數(shù)字格式化 
    System.out.println(df4.format(0.01111));

    //用","將數(shù)字按3位隔開
    DecimalFormat df5 = new DecimalFormat(",###");//數(shù)字格式化  
    System.out.println(df5.format(981725025));

    DecimalFormat df6 = new DecimalFormat("頂頂頂頂頂,###");//數(shù)字格式化 
    System.out.println(df6.format(981725025));

    DecimalFormat df7 = new DecimalFormat("###,###.000");//數(shù)字格式化  
    System.out.println(df7.format(981725025.981725025));//--會四舍五入

  }
}

0.01
0.010
11.000%
1.11%
981,725,025
頂頂頂頂頂981,725,025
981,725,025.982