drawarcdemo.java

Java 程序设计源码 只提供了部分

import javax.swing.*;
import java.awt.Graphics;
import java.awt.Color;

public class DrawArcDemo extends JFrame {
  public DrawArcDemo() {
    super("绘制圆弧");
    this.getContentPane().add(new ArcPanel());
    setSize(300, 300);
   setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

  public static void main(String[] args) {
    DrawArcDemo dad = new DrawArcDemo();

    dad.setVisible(true);
  }
}

class ArcPanel extends JPanel {
  public void paintComponent(Graphics g) {
    int arcArray[] = {
        30, 45, 60, 90, 135};

    int start = 0;

    Color colorArray[] = {
        Color.green, Color.red, Color.blue, Color.yellow, Color.orange};

    g.drawRect(getSize().width / 2 - 100, getSize().height / 2 - 100, 200, 200);

    for (int i = 0; i < arcArray.length; i++) {
      g.setColor(colorArray[i]);

      g.fillArc(getSize().width / 2 - 100, getSize().height / 2 - 100, 200, 200,
                start, arcArray[i]);

      start += arcArray[i];
    }
  }
}