import java.awt.*;
import javax.swing.JPanel;
public class FigurePanel extends JPanel {
// Define constants
public static final int LINE = 1;
public static final int RECTANGLE = 2;
public static final int ROUND_RECTANGLE = 3;
public static final int OVAL = 4;
public static final int ARC = 5;
public static final int POLYGON = 6;
private int type = 1;
private boolean filled;
/** Construct a default FigurePanel */
public FigurePanel() {
}
/** Construct a FigurePanel with the specified type */
public FigurePanel(int type) {
this.type = type;
}
/** Construct a FigurePanel with the specified type and filled */
public FigurePanel(int type, boolean filled) {
this.type = type;
this.filled = filled;
}
/** Draw a figure on the panel */
public void paintComponent(Graphics g) {
super.paintComponent(g);
// Get the appropriate size for the figure
int width = getSize().width;
int height = getSize().height;
switch (type) {
case LINE: // Display two cross lines
g.setColor(Color.BLACK);
g.drawLine(10, 10, width - 10, height - 10);
g.drawLine(width - 10, 10, 10, height - 10);
break;
case RECTANGLE: // Display a rectangle
g.setColor(Color.BLUE);
if (filled)
g.fillRect((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height));
else
g.drawRect((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height));
break;
case ROUND_RECTANGLE: // Display a round-cornered rectangle
g.setColor(Color.RED);
if (filled)
g.fillRoundRect((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height), 20, 20);
else
g.drawRoundRect((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height), 20, 20);
break;
case OVAL: // Display an oval
g.setColor(Color.BLACK);
if (filled)
g.fillOval((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height));
else
g.drawOval((int)(0.1 * width), (int)(0.1 * height),
(int)(0.8 * width), (int)(0.8 * height));
break;
case ARC: // Display an arc
g.setColor(Color.BLACK);
if (filled) {
int xCenter = getWidth() / 2;
int yCenter = getHeight() / 2;
int radius =
(int)(Math.min(getWidth(), getHeight()) * 0.4);
int x = xCenter - radius;
int y = yCenter - radius;
g.fillArc(x, y, 2 * radius, 2 * radius, 0, 30);
g.fillArc(x, y, 2 * radius, 2 * radius, 90, 30);
g.fillArc(x, y, 2 * radius, 2 * radius, 180, 30);
g.fillArc(x, y, 2 * radius, 2 * radius, 270, 30);
}
else {
int xCenter = getWidth() / 2;
int yCenter = getHeight() / 2;
int radius =
(int)(Math.min(getWidth(), getHeight()) * 0.4);
int x = xCenter - radius;
int y = yCenter - radius;
g.drawArc(x, y, 2 * radius, 2 * radius, 0, 30);
g.drawArc(x, y, 2 * radius, 2 * radius, 90, 30);
g.drawArc(x, y, 2 * radius, 2 * radius, 180, 30);
g.drawArc(x, y, 2 * radius, 2 * radius, 270, 30);
};
break;
case POLYGON: // Display a polygon
g.setColor(Color.BLACK);
int xCenter = getWidth() / 2;
int yCenter = getHeight() / 2;
int radius =
(int)(Math.min(getWidth(), getHeight()) * 0.4);
// Create a Polygon object
Polygon polygon = new Polygon();
// Add points to the polygon
polygon.addPoint(xCenter + radius, yCenter);
polygon.addPoint((int)(xCenter + radius *
Math.cos(2 * Math.PI / 6)), (int)(yCenter - radius *
Math.sin(2 * Math.PI / 6)));
polygon.addPoint((int)(xCenter + radius *
Math.cos(2 * 2 * Math.PI / 6)), (int)(yCenter - radius *
Math.sin(2 * 2 * Math.PI / 6)));
polygon.addPoint((int)(xCenter + radius *
Math.cos(3 * 2 * Math.PI / 6)), (int)(yCenter - radius *
Math.sin(3 * 2 * Math.PI / 6)));
polygon.addPoint((int)(xCenter + radius *
Math.cos(4 * 2 * Math.PI / 6)), (int)(yCenter - radius *
Math.sin(4 * 2 * Math.PI / 6)));
polygon.addPoint((int)(xCenter + radius *
Math.cos(5 * 2 * Math.PI / 6)), (int)(yCenter - radius *
Math.sin(5 * 2 * Math.PI / 6)));
// Draw the polygon
if (filled)
g.fillPolygon(polygon);
else
g.drawPolygon(polygon);
}
}
/** Set a new figure type */
public void setType(int type) {
this.type = type;
// repaint();
}
/** Return figure type */
public int getType() {
return type;
}
/** Set a new filled property */
public void setFilled(boolean filled) {
this.filled = filled;
repaint();
}
/** Check if the figure is filled */
public boolean isFilled() {
return filled;
}
/** Specify preferred size */
public Dimension getPreferredSize() {
return new Dimension(80, 80);
}
}
^ 即图形面板类
import java.awt.*;
import javax.swing.*;
public class fan extends JFrame {
public static void main(String[] args) {
JFrame frame = new fan();
frame.setSize(300, 300);
frame.setTitle("Exercise13_09");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLocationRelativeTo(null); // Center the frame
frame.setVisible(true);
}
public fan() {
setLayout(new GridLayout(2, 2));
add(new FigurePanel(FigurePanel.ARC, true));
add(new FigurePanel(FigurePanel.OVAL));
add(new FigurePanel(FigurePanel.ARC, true));
add(new FigurePanel(FigurePanel.OVAL, true));
}
}
这是粉丝课
我目前正在尝试制作一张风扇的照片以显示在屏幕上，并且想知道是否有办法让它在同一个位置绘制弧线和椭圆形？我一直在搞乱图形面板类，但我不太确定如何将 ARC true 与 OVAL 合并。帮助将不胜感激谢谢