package com.dev2qa.example.java;
import java.text.DecimalFormat;
public class DecimalFormatExample { public static void main(String args[]) { // PI double pi=3.1415927; // Take one integer. DecimalFormat df = new DecimalFormat("0"); System.out.println(df.format(pi)); // 3 //Take one integer and two decimal df = new DecimalFormat("0.00"); System.out.println(df.format(pi)); // 3.14 // Take two integers and three decimals, and the inadequacies for integer are filled with 0. df = new DecimalFormat("00.000"); System.out.println(df.format(pi));// 03.142 // Take all the integers. df = new DecimalFormat("#"); System.out.println(df.format(pi)); // 3 // Count as a percentage and take two decimal places. df = new DecimalFormat("#.##%"); System.out.println(df.format(pi)); //314.16% // light speed. long lightSpeed = 299792458; // Display use scientific counting method and take five decimal places. df = new DecimalFormat("#.#####E0"); System.out.println(df.format(lightSpeed)); //2.99792E8 // Use scientific counting method to show two integers and four decimal places. df = new DecimalFormat("00.####E0"); System.out.println(df.format(lightSpeed)); //29.9792E7 //Each three integer are separated by commas. df = new DecimalFormat(",###"); System.out.println(df.format(lightSpeed)); //299,792,458 //Embed formatting in text. df = new DecimalFormat("The speed of light is ,### meters per second."); System.out.println(df.format(lightSpeed)); }