Go语言视频零基础入门到精通

javalearner · 发表于 2014-10-29 23:55:45

这是这个Applet的HTML文件:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<BODY>
<APPLET CODE = "LogoVBar.class" WIDTH = "600" HEIGHT = "500">
</APPLET>
</BODY>
</HTML>

下面的画垂直柱状图的源码:

// Fig. 3.02_01: LogoVBar.java
// Java Applet Web图表实例3：带Java徽标的Web图表
import java.awt.*; // 引入 java.awt包中所有的类
import javax.swing.*; // 引入 javax.swing包中所有的类
public class LogoVBar extends JApplet
{
Image logoJPG;
Image offImage;
Graphics offGraphics;
int appletWidth = 600, appletHeight = 500;
int bookSales[] = new int[5];
String bookTitle[] =
{
"Python", "JAVA", "C#", "Perl", "PHP"
};
// 初始化颜色数组
Color color[] =
{
new Color(99, 99, 0), Color.GREEN, Color.YELLOW, Color.RED, Color.BLUE
};
// 初始化绘图缓冲区
public void init()
{
offImage = createImage(appletWidth, appletHeight);
offGraphics = offImage.getGraphics();
for (int i = 0; i < bookSales.length; i++)
{
bookSales[i] = 1+(int)(Math.random() * 100);
}
logoJPG = getImage(getDocumentBase(), "javaLogo.jpg");
}
public void paint(Graphics g)
{
// 调用父类的 paint 方法
super.paint(g);
update(g);
} // paint 方法结束
public void update(Graphics g)
{
// 绘制标题区域
offGraphics.drawImage(logoJPG, 100, 0, this);
offGraphics.setColor(Color.BLACK);
offGraphics.setFont(new Font("方正粗宋简体", Font.BOLD, 30));
offGraphics.drawString("带Java徽标的Web图表", 135, 40);
// 绘制代表销售量的10条直线
offGraphics.setFont(new Font("SansSerif", Font.PLAIN, 12));
int salesValue = 0;
for (int i = 418; i > 0; i -= 38)
{
offGraphics.setColor(Color.BLACK);
offGraphics.drawString("" + salesValue, 40, (i + 27));
offGraphics.setColor(Color.LIGHT_GRAY);
offGraphics.drawLine(80, (i + 27), 520, (i + 27));
salesValue += 10;
}
// 绘制实心矩形
int drawHigh = 0;
for (int i = 0; i < bookTitle.length; i++)
{
offGraphics.setColor(color[i]);
drawHigh = (int)(Math.ceil(bookSales[i] * 3.8));
offGraphics.fill3DRect(110+i * 80, 445-drawHigh, 50, drawHigh, true);
offGraphics.setColor(Color.BLACK);
offGraphics.drawString(bookTitle[i], 110+i * 80, 465);
}
// 绘制坐标系
offGraphics.setColor(Color.BLACK);
offGraphics.drawLine(80, 40, 80, 445);
offGraphics.drawLine(80, 445, 550, 445);
// 绘制坐标系说明
offGraphics.setFont(new Font("黑体", Font.BOLD, 16));
offGraphics.drawString("销售量", 20, 50);
offGraphics.drawString("编程书籍", 500, 465);
// 输出缓冲区图像
g.drawImage(offImage, 0, 0, null);
}
} // LogoVBar 类结束

复制代码

/*************************************************************

(C) Copyright 2004-2005 by Jingkui Zhong(钟京馗) and Huan Tang(唐桓). *

* All Rights Reserved. *

* *

* DISCLAIMER: The authors of this code have used their *

* best efforts in preparing the code. These efforts include the *

* development, research, and testing of the theories and programs *

* to determine their effectiveness. The authors and publisher make *

* no warranty of any kind, expressed or implied, with regard to these *

* programs or to the documentation contained in these codes. The authors *

* shall not be liable in any event for incidental or consequential *

* damages in connection with, or arising out of, the furnishing, *

* performance, or use of these programs. *

****************************************************************/

源码下载：http://file.javaxxz.com/2014/10/29/235545328.zip

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