2 decimal places in Java, Just started doing Java in class last week -

started taking java class @ school , doing credit , need figuring out how have 2 decimal places. thank help. christopher

import java.util.scanner;

public class chaptertwoex8 { public static void main(string[] args) {

//create scanner object read keyboard input.   scanner keyboard = new scanner(system.in);   //declare constants   final double sales_tax_rate = 0.07;   final double tip = 0.15;  //declare variables    double yourmealsprice;    double wifemealsprice;    double sum;    double tip;    double totalcostofmeal;    double salestax;    //get prices of meals.      system.out.println("please enter price of wives meal.");      wifemealsprice = keyboard.nextdouble();      system.out.println("please enter price of meal.");      yourmealsprice = keyboard.nextdouble();    //calculate cost of meals.      sum = (double) wifemealsprice + yourmealsprice;    //calcute sales tax      salestax = (double) sum * sales_tax_rate;    //calcute tip      tip = (double) sum * tip;    //calcute total cost of meal      totalcostofmeal = (double) sum + tip + salestax;    system.out.println("your meals $ " + sum);    system.out.println("the total tax paid $ " + salestax);   system.out.println("the tip should leave $ " + tip);   system.out.println("the amount of money paid keep wife happy night $ " + totalcostofmeal);              } 

}

use numberformat

numberformat nf = numberformat.getinstance(); nf.setmaximumfractiondigits(2); string formattedsum = nf.format(sum); system.out.println("your meals $ " + formattedsum);  system.out.println("the total tax paid $ " + nf.format(salestax)); system.out.println("the tip should leave $ " + nf.format(tip)); system.out.println("the amount of money paid keep wife happy night $ " + nf.format(totalcostofmeal)); 

or, rid of dollar signs , use numberformat.getcurrencyinstance(); instead of using numberformat.getinstance();