java语言玫瑰花代码

以下是一个简单的Java语言玫瑰花代码的例子：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class RoseNJFrame extends JFrame implements ActionListener, ComponentListener {
    private static final long serialVersionUID = 1L;
    private JPanel contentPane;
    private JTextField textField;
    private JButton btnDraw;
    private JRadioButton[] radiobutton;
    private int select = 0;
    private int width = 600;
    private int height = 600;

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    RoseNJFrame frame = new RoseNJFrame();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public RoseNJFrame() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 600, 600);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);

        textField = new JTextField();
        textField.setBounds(10, 10, 200, 30);
        contentPane.add(textField);
        textField.setColumns(10);

        btnDraw = new JButton("Draw");
        btnDraw.setBounds(220, 10, 80, 30);
        contentPane.add(btnDraw);
        btnDraw.addActionListener(this);

        String[] rosestr = { "Rose1", "Rose2", "Rose3", "Rose4", "Rose5" };
        radiobutton = new JRadioButton[5];
        ButtonGroup group = new ButtonGroup();
        for (int i = 0; i < 5; i++) {
            radiobutton[i] = new JRadioButton(rosestr[i]);
            radiobutton[i].setBounds(320 + i * 80, 10, 80, 30);
            radiobutton[i].addActionListener(this);
            group.add(radiobutton[i]);
            contentPane.add(radiobutton[i]);
        }
        radiobutton[0].setSelected(true);

        addComponentListener(this);
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == btnDraw) {
            String str = textField.getText();
            if (str.length() > 0) {
                Graphics g = getGraphics();
                g.clearRect(0, 0, width, height);
                drawRose(g, select, str);
            }
        } else {
            for (int i = 0; i < 5; i++) {
                if (e.getSource() == radiobutton[i]) {
                    select = i;
                    break;
                }
            }
        }
    }

    public void componentResized(ComponentEvent e) {
        width = getWidth();
        height = getHeight();
    }

    public void componentMoved(ComponentEvent e) {
    }

    public void componentShown(ComponentEvent e) {
    }

    public void componentHidden(ComponentEvent e) {
    }

    private void drawRose(Graphics g, int select, String str) {
        int n = 3 + select * 2;
        double d = 2 * Math.PI / n;
        int r = Math.min(width, height) / 2 - 50;
        int x0 = width / 2;
        int y0 = height / 2;
        g.setColor(Color.RED);
        for (int i = 0; i < n; i++) {
            double theta = i * d;
            double r1 = r * Math.sin(n * theta);
            double r2 = r * Math.cos(n * theta);
            int x1 = (int) (x0 + r1 * Math.cos(theta) - r2 * Math.sin(theta));
            int y1 = (int) (y0 + r1 * Math.sin(theta) + r2 * Math.cos(theta));
            g.drawString(str, x1, y1);
        }
    }
}