我需要有关此代码的帮助。结果将进入一个新窗口。我想要的是结果在我输入值的主窗口内。
下面的代码将有一个显示结果的弹出屏幕，而不是在零售价框中显示答案。我知道这可能是一个简单的问题或修复希望有人帮助我修复这段代码，因为我还在学习。
package com.retailcalcu;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;
public class Retailcalculator extends JFrame{
private JPanel panel; // to reference a panel
private JLabel wholeSaleMessageLabel; // to reference a label
private JLabel markupMessageLabel; // to reference a label
private JLabel retailPriceLabel; // to reference a label
private JTextField wholeSalePriceField; // to reference the Whole Sale Price Field
private JTextField markUpPercentage; // to reference the Mark Up text field
private JTextField retailPrice; // to reference the Retail Price Field
private JButton calculateButton; // to reference button
private final int WINDOW_WIDTH = 400; // Window Width
private final int WINDOW_HEIGHT = 150; // Window Height
public static void main(String[] args){
new Retailcalculator();
}
public Retailcalculator(){
// set window title
setTitle("Retail Price Calculator");
// set widow size
setSize(WINDOW_WIDTH, WINDOW_HEIGHT);
// tell what to do when the window closes
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// build the panel and add it to the frame
buildPanel();
// add the panel to the frame's content pane
add(panel);
// display the window
setVisible(true);
}
private void buildPanel()
{
// create a label for the wholesale price
wholeSaleMessageLabel = new JLabel("Enter Wholesale Price: ");
// create a text field 15 characters wide
wholeSalePriceField = new JTextField(15);
// create a label for the mark up percentage
markupMessageLabel = new JLabel("Enter Mark Up Percentage: ");
// create a text field 15 characters wide
markUpPercentage = new JTextField(15);
// create a button with the capation "Calculate Retail Price"
calculateButton = new JButton("Calculate Retail Price");
// add an action listener to the button
calculateButton.addActionListener(new CalcButtonListener());
// create a label for the retail price
retailPriceLabel = new JLabel("The Retail Price is: $");
// create a text field 15 characters wide for the retail price
retailPrice = new JTextField(15);
// create a JPanel object and let the panel filed reference it
panel = new JPanel();
// add the labels, rext field and button compnenets to the panel
panel.add(wholeSaleMessageLabel);
panel.add(wholeSalePriceField);
panel.add(markupMessageLabel);
panel.add(markUpPercentage);
panel.add(calculateButton);
panel.add(retailPriceLabel);
panel.add(retailPrice);
/** calculateButton is an action listener class for the Calculate Button*/
}
class CalcButtonListener implements ActionListener{
// This method executes when the user clicks on the Calculate Button
public void actionPerformed(ActionEvent e)
{
String wholesaleInput; // to hold user input for wholesale price
String markUpInput; // to hold user input for mark up percentage
double retailPrice; // declare retail price as a double
double wholePrice; // declare wholesale prcie as a double
double markUp; // declare markup percentage as a double
// get the text entered by the user in the text field box
wholesaleInput = wholeSalePriceField.getText();
// convert wholesale text to double
wholePrice = Double.parseDouble(wholesaleInput);
// get the text entered by the user in the percentage text field
markUpInput = markUpPercentage.getText();
// parse out the markup percentage from the percentage text field
markUp = Double.parseDouble(markUpInput);
// do function to calculate retail price( wholesale * markup)
retailPrice = ((wholePrice * markUp) * .01) + wholePrice;
// display the results
JOptionPane.showMessageDialog(null, retailPrice);
}
}
}