Question

java编写一个图形界面程序

如图。谢谢 有点急。

Answer 1

import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.border.Border;


class MainFrame extends JFrame {

	private static final long serialVersionUID = 1L;

	private Map<String, Integer> sizes = new HashMap<String, Integer>();
	
	private Map<String, Integer> styles = new HashMap<String, Integer>();
	
	private Map<String, Integer> toppings = new HashMap<String, Integer>();
	
	public MainFrame() {
		
		sizes.put("Extra Large", 10);
		sizes.put("Large", 8);
		sizes.put("Medium", 5);
		sizes.put("Small", 3);
		
		styles.put("Deep Dish", 20);
		styles.put("Regular", 10);
		styles.put("Thin Crust", 5);
		styles.put("Chicago", 3);
		
		toppings.put("Cheese", 8);
		toppings.put("Tomato", 7);
		toppings.put("Peppers", 6);
		toppings.put("Peperoni", 5);
		
		this.setTitle("布局及事件处理");
		this.setSize(450, 350);
		this.setLayout(new BorderLayout());
		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		JLabel lblTitle = new JLabel();
		lblTitle.setText("Pizzeria Juno");
		lblTitle.setFont(new Font("宋体", Font.BOLD, 36));
		lblTitle.setHorizontalAlignment(SwingConstants.CENTER);
		this.add("North", lblTitle);
		
		JPanel bodyPanel = new JPanel();
		bodyPanel.setLayout(new GridLayout(2, 1));
		this.add("Center", bodyPanel);
		
		JPanel listPanel = new JPanel();
		listPanel.setLayout(new GridLayout(1, 3));
		listPanel.setSize(200, 200);
		bodyPanel.add(listPanel);

		Border lineBorder = BorderFactory.createLineBorder(Color.BLACK);
		
		JPanel sizePanel = new JPanel();
		sizePanel.setLayout(new BorderLayout());
		listPanel.add(sizePanel);
		JLabel sizeTitle = new JLabel();
		sizeTitle.setText("Sizes");
		sizePanel.add("North", sizeTitle);
		
		
		JList sizeList = new JList(sizes.keySet().toArray());
		sizeList.setSize(100, 100);
		sizeList.setBorder(lineBorder);
		sizeList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		sizePanel.add(sizeList);
		
		JPanel stylePanel = new JPanel();
		stylePanel.setLayout(new BorderLayout());
		listPanel.add(stylePanel);
		JLabel styleTitle = new JLabel();
		styleTitle.setText("Styles");
		stylePanel.add("North", styleTitle);	
		JList styleList = new JList(styles.keySet().toArray());
		styleList.setSize(100, 100);
		styleList.setBorder(lineBorder);
		styleList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
		stylePanel.add(styleList);
		
		JPanel toppingPanel = new JPanel();
		toppingPanel.setLayout(new BorderLayout());
		listPanel.add(toppingPanel);
		JLabel toppingTitle = new JLabel();
		toppingTitle.setText("Toppings");
		toppingPanel.add("North", toppingTitle);	
		JList toppingList = new JList(toppings.keySet().toArray());
		toppingList.setSize(100, 100);
		toppingList.setBorder(lineBorder);
		toppingPanel.add(toppingList);
		
		JTextArea txtResult = new JTextArea();
		txtResult.setEditable(false);
		bodyPanel.add(txtResult);
		
		JPanel bottomPanel = new JPanel();
		bottomPanel.setLayout(new GridLayout(1, 3));
		this.add("South", bottomPanel);
		
		JLabel label1 = new JLabel("Click to complete order");
		bottomPanel.add(label1);
		
		JButton btnRingUp = new JButton("Ring up");
		btnRingUp.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				
				
				
				if(sizeList.getSelectedValue() == null) {
					JOptionPane.showMessageDialog(MainFrame.this, "Please select size.");
					return;
				}
				
				if(styleList.getSelectedValue() == null) {
					JOptionPane.showMessageDialog(MainFrame.this, "Please select style.");
					return;
				}
				
				if(toppingList.getSelectedValue() == null) {
					JOptionPane.showMessageDialog(MainFrame.this, "Please select topping.");
					return;
				}
				
				float total = 0;
				
				String size = sizeList.getSelectedValue().toString();
				total += sizes.get(size);
				
				String style = styleList.getSelectedValue().toString();
				total += styles.get(style);
				
				String result = size + " Pizza, " + style + " Style";
				
				Object[] toppings = toppingList.getSelectedValues();
				for(Object topping : toppings) {
					result += "\n  +" + topping.toString();
					total += MainFrame.this.toppings.get(topping.toString());
				}
				
				result += "\n  Total: " + total;
				
				txtResult.setText(result);
			}
		});
		bottomPanel.add(btnRingUp);
		
		JButton btnQuit = new JButton("Quit");
		btnQuit.addActionListener(new ActionListener() {

			@Override
			public void actionPerformed(ActionEvent e) {
				MainFrame.this.dispose();
			}
		});
		bottomPanel.add(btnQuit);
	}
	
}

public class App {

	public static void main(String[] args) {
		
		
		MainFrame mainFrame = new MainFrame();
		mainFrame.setVisible(true);

	}

}

Answer 2

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 SimpleCalc extends JFrame { public static void main(String[] args) { new SimpleCalc(); } public SimpleCalc() { setSize(500, 200); setDefaultCloseOperation(EXIT_ON_CLOSE); setLocationRelativeTo(null); init(); setVisible(true); } protected void init() { setTitle("Simple Calc"); JPanel p = new JPanel(); add(p); JTextField num1 = new JTextField(10); p.add(num1); p.add(new JLabel("+")); JTextField num2 = new JTextField(10); p.add(num2); p.add(new JLabel("=")); JTextField result = new JTextField(10); result.setEditable(false); p.add(result); JButton calc = new JButton("计算"); calc.addActionListener(new CalcListener(num1, num2, result)); p.add(calc); } class CalcListener implements ActionListener { private JTextField num1, num2, result; CalcListener(JTextField num1, JTextField num2, JTextField result) { this.num1 = num1; this.num2 = num2; this.result = result; } @Override public void actionPerformed(ActionEvent e) { try { double n = Double.parseDouble(num1.getText()) + Double.parseDouble(num2.getText()); result.setText(String.valueOf(n)); } catch (Exception ex) { JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE); } } } }

Answer 3

做好了吗

追答

需要的话

Answer 4

文件写好了，私信我，发给你。

Answer 5

文件资料我这有。