public class ShowChart extends Applet
Листинг 1
. Файл ShowChart.java
import java.applet.*; import java.awt.*; import java.net.*; import java.io.*; import java.util.*;
public class ShowChart extends Applet { URL SrcURL; Object URLContent; int errno = 0; String str; byte buf[] = new byte[200];
public String getAppletInfo() { return "Name: ShowChart"; }
public void init() { try { SrcURL = new URL( "http://frolov/chart.txt");
try { InputStream is = SrcURL.openStream();
is.read(buf);
str = new String(buf, 0);
} catch (IOException ioe) { showStatus("read exception");
errno = 1; } } catch (MalformedURLException uex) { showStatus( "MalformedURLException exception");
errno = 2; } }
public void paint(Graphics g) { Integer AngleFromChart = new Integer(0);
int PrevAngle = 0; int rColor, gColor, bColor; Dimension dimAppWndDimension = getSize();
g.setColor(Color.yellow);
g.fillRect(0, 0, dimAppWndDimension.width - 1, dimAppWndDimension.height - 1);
g.setColor(Color.black);
g.drawRect(0, 0, dimAppWndDimension.width - 1, dimAppWndDimension.height - 1);
showStatus(str);
StringTokenizer st = new StringTokenizer(str, ",\r\n");
while(st.hasMoreElements()) { rColor = (int)(255 * Math.random());
gColor = (int)(255 * Math.random());
bColor = (int)(255 * Math.random());
g.setColor(new Color(rColor, gColor, bColor));
String angle = (String)st.nextElement();
AngleFromChart = new Integer(angle) ; g.fillArc(0, 0, 200, 200, PrevAngle, AngleFromChart.intValue());
PrevAngle += AngleFromChart.intValue();
} } }
Исходный текст документа HTML, созданного автоматически для нашего аплета, представлен в листинге 2.
