Two decimal places

Question

Hello, i want to have my results in my shop apllication in two decimal places. I tried DecimalFormat f = new DecimalFormat("#.##"); with import java.text.DecimalFormat; but it doesnt change the decimal places.
And when i try this class example which i found on http://www.roseindia.net/java/beginners/RoundTwoDecimalPlaces.shtml it says that inner classes cannot have static declarations on public static void main(String[] args) {          and     public static float Round(float Rval, int Rpl) {
Im using netbeans 5,5, does someone know what the problem is?
public class RoundTwoDecimalPlaces{
public static void main(String[] args) {
float num = 2.954165f;
float round = Round(num,2);
System.out.println("Rounded data: " + round);
public static float Round(float Rval, int Rpl) {
float p = (float)Math.pow(10,Rpl);
Rval = Rval * p;
float tmp = Math.round(Rval);
return (float)tmp/p;
Edited by: javaboy on Nov 11, 2007 12:46 PM

Answer 1

package view;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import controller.index;
import model.product;
import java.text.*;
public class View_basket extends JPanel implements ActionListener{
     private static final long serialVersionUID = 1L;
     private index index;
     private JButton btnGoToPay;
     private JLabel[] lblProducts, lblPrices;
     private int countProducts;
     private int offset=40;          // # of pixels from the top
     private int increment=20;     // the next product will appear this amount of pixels below it's predecessor
     private JPanel container;
     public View_basket(index index){
          this.container = new JPanel(null);
          this.container.setName("Shopping basket");
          this.container.setBackground(new Color(151, 186, 225));          
          this.container.setSize(190,200);
          this.container.setLocation(550,20);
          this.index=index;
     public JPanel updateGui(){
          System.out.println("class view.View_basket.updateGui()");
          ArrayList products = index.basket.getProducts();
          countProducts = products.size();
          // if product basket is to big, resize the basket frame
          if(countProducts > 6){
               this.container.setSize(190,(300+((countProducts-6)*10)));     
          lblProducts = new JLabel[countProducts];
          lblPrices = new JLabel[countProducts];
          JLabel lblTitle = new JLabel();
          lblTitle.setText("Winkelmand");
          lblTitle.setBounds(5, 5, 150, 20);
          lblTitle.setFont(index.FONT_12_BOLD);
          this.container.add(lblTitle);
          int teller=offset;
          double total=0;
          // walk trough all values from the arrayList
          for(int i=0; i < countProducts; i++){
               product product = (product)products.get(i);
               lblProducts[i] = new JLabel(product.toString());
               lblProducts.setBounds(5, teller, 130, 20);
               lblProducts[i].setFont(index.FONT_10_PLAIN);
               this.container.add(lblProducts[i]);
               lblPrices[i] = new JLabel("? "+ product.getPrice());
               lblPrices[i].setBounds(140, teller, 150, 20);
               lblPrices[i].setFont(index.FONT_10_PLAIN);
               this.container.add(lblPrices[i]);
               teller +=increment;
               total += product.getPrice();
          // create total labels
          JLabel lblTotal = new JLabel("Totaal: ");
          lblTotal.setBounds(5, teller, 50, 20);
          lblTotal.setFont(index.FONT_10_BOLD);
          this.container.add(lblTotal);
          // create total labelseeuro
          JLabel lblTotalPriceeuro = new JLabel("? "+ total);
          lblTotalPriceeuro.setBounds(140, teller, 50, 20);
          lblTotalPriceeuro.setFont(index.FONT_10_BOLD);
          this.container.add(lblTotalPriceeuro);
// create total labelsdollar
          JLabel lblTotalPricedollar = new JLabel("$ "+ total*1.45);
          lblTotalPricedollar.setBounds(140, teller, 50, 40);
          lblTotalPricedollar.setFont(index.FONT_10_BOLD);
          this.container.add(lblTotalPricedollar);
          int btnOffset = this.container.getHeight()-25;
          btnGoToPay = new JButton("Betalen...");
          btnGoToPay.setBounds(5, btnOffset, 180, 20);
          btnGoToPay.setFont(index.FONT_12_BOLD);
          btnGoToPay.addActionListener( this );     
          if(countProducts == 0)
               btnGoToPay.setEnabled(false);
          this.container.add(btnGoToPay);
          return container;
     public void actionPerformed(ActionEvent event) {
          // if the pay button is pressed
          if(event.getSource().equals(btnGoToPay)){
               ((View_pay) index.panelPay).updateGui();
               index.showPanel("View_pay");