pieshape改1.java

java做的一个饼图

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



class PieColors
{
 Color pieColorArray[] = {new Color(210,60,60), new Color(60,210,60), new Color(60,60,210), new Color(120,60,120), new Color(60,120,210), new Color(210,120,60)};
 int curPieColor = 0;
 public Color getPieColor()
 {
  return pieColorArray[curPieColor];
 }
 public void setNewColor()
 {
  curPieColor++;
  if(curPieColor >= pieColorArray.length)
    {
	curPieColor = 0;
    }
 }
}




public class PieShape
{
   public static void main(String[] args)
   {
      TextTestFrame frame = new TextTestFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.show();
   }
}

class TextTestFrame extends JFrame
{
   public static final int DEFAULT_WIDTH = 800;
   public static final int DEFAULT_HEIGHT = 600;
   public TextTestFrame()
   {
      setTitle("Pie");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);
      Container contentPane = getContentPane();
      PiePanel pie = new PiePanel();
      contentPane.add(pie, BorderLayout.CENTER);
   }
}




class PiePanel extends JPanel
{
 int WIDTH  = 400;
 int HEIGHT = 200;
 int innerOffset=20;
 int pieHeight = HEIGHT - (innerOffset * 2);
 int pieWidth =  pieHeight;
 int halfWidth = WIDTH/2;
 int x_pie = innerOffset;
 int y_pie = innerOffset;
 int border = 20;
 String products[] = {"APPLE","PEAR","OYY","kkk"};
 float sales[] = {3,4,5,6};
 int startAngle = 0;
 int legendWidth = 20;
 int x_legendText = halfWidth + innerOffset/2 + legendWidth + 5;
 int x_legendBar = halfWidth + innerOffset/2;
 int textHeight = 20;
 int curElement = 0;
 int y_legend = 0;
 int innerWIDTH = WIDTH - (innerOffset * 2);
//graph dimensions
 Dimension graphDim = new Dimension(WIDTH,HEIGHT);
 Rectangle graphRect = new Rectangle(graphDim);
//border dimensions
 Dimension borderDim = new Dimension(halfWidth-2,HEIGHT-2);
 Rectangle borderRect = new Rectangle(borderDim);


   public void paintComponent(Graphics g)
   {


 	PieColors pc = new PieColors();
 	Color dropShadow = new Color(240,240,240);

 	super.paintComponent(g);
 	Graphics2D g2d = (Graphics2D)g;


 // Set Antialiasing
        RenderingHints renderHints = new RenderingHints(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHints(renderHints);
 //Set graph background color to white:
        g2d.setColor(Color.white);
        g2d.fill(graphRect);
 //Draw black border
        g2d.setColor(Color.black);
        borderRect.setLocation(1,1);
        g2d.draw(borderRect);
 //Now draw border for legend
        borderRect.setLocation((WIDTH/2) + 1,1);
        g2d.draw(borderRect);




 //Main chart Ellipse
 	Ellipse2D.Double elb = new Ellipse2D.Double(x_pie - border/2, y_pie - border/2, pieWidth + border, pieHeight + border);
 //Shadow
 	g2d.setColor(dropShadow);
 	g2d.fill(elb);
 //Border
 	g2d.setColor(Color.black);
 	g2d.draw(elb);
 /////////////////////////////////////////////////////////////////////////////////////
 // Calculate the total sales
 /////////////////////////////////////////////////////////////////////////////////////
 	float salesTotal = 0.0f;
 	int lastElement = 0;
 	for(int i=0; i<products.length; i++)
	{
  		if(sales[i] > 0.0f)
		{
    			salesTotal += sales[i];
    			lastElement = i;
  		}
 	}


 	Dimension legendDim = new Dimension(legendWidth , textHeight/2);
 	Rectangle legendRect = new Rectangle(legendDim);
 	for(int i=0; i<products.length; i++)
	{
 		 if(sales[i] > 0.0f)
		{
    			float perc = (sales[i]/salesTotal);
    //Calculate new angle
    			int sweepAngle = (int)(perc * 360);
    //Check that the last element goes back to 0 position
    			if (i == lastElement)
			{
				sweepAngle = 360-startAngle;}
    // Draw Arc
    				g2d.setColor(pc.getPieColor());
    				g2d.fillArc(x_pie, y_pie, pieWidth, pieHeight, startAngle, sweepAngle);
    //Increment startAngle with the sweepAngle
    				startAngle += sweepAngle;
    /////////////
    //Draw Legend
    /////////////
    //Set y position for bar
    				y_legend = curElement * textHeight + innerOffset;
    //Display the current product
    				String display = products[i];
    				g2d.setColor(Color.black);
    				g2d.drawString(display, x_legendText, y_legend);
    //Display the total sales
    				display = "" + (int)sales[i];
    				g2d.setColor(Color.black);
    				g2d.drawString(display, x_legendText + 80, y_legend);
    //Display the sales percentage
    				display = "  (" + (int)(perc*100) + "%)";
    				g2d.setColor(Color.red);
    				g2d.drawString(display, x_legendText + 110, y_legend);
    //Draw the bar
    				g2d.setColor(pc.getPieColor());
    				legendRect.setLocation(x_legendBar,y_legend - textHeight/2);
    				g2d.fill(legendRect);
    //Set new pie color
    				pc.setNewColor();
    //Increment
    				curElement++;
  			}
 		}
	}
  }