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Here is the source code:
import java.applet.*;
import java.awt.*;
public class PiLeibniz extends Applet {
public void paint(Graphics g)
{
long iterations = 0;
double pi = 0.0;
double denom = 1.0;
double value;
boolean addIt = true;
while ( iterations < 5000 )
{
g.clearRect(0, 0, 200, 40);
g.drawString("" + pi + "", 10, 10);
value = 4.0 / denom;
if ( addIt )
pi += value;
else
pi -= value;
addIt = ! addIt;
denom += 2.0;
iterations++;
}
g.clearRect(0, 0, 200, 40);
g.drawString("Pi was computed to " + pi + " after " + iterations + " iterations.", 10, 10);
}
}
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