Distributed computing – putting it all together - JavaTech: An Introduction to Scientific and Technical Computing with Java - page 566

... calculation section of startRunning() ...

float[] data = new float[6];
float[] new - indata = new float[6];
if (time <= fMaxTime) {
try {
Thread.sleep (100);

}
catch (InterruptedException ie) {/*ignore*/}
// Continue with calculations

...

data[0] = time;
// position x = A*sin (omega*t)
data[1] = fAmplitude * (float) Math.sin (fOmega * time);
// velocity v = omega*A*cos(omega*t)
data[2] = fOmega * fAmp * (float) Math.cos (fOmega *
time);
// acceleration =-omega**2*A*sin(omega*t)
// =-omega**2 * x
data[3] =-fOmega * fOmega * data[1];
// kinetic energy = 1/2*m*v**2
data[4] =.5f * fMass * data[2] * data[2];
// potential energy = 1/2*k*x**2
data[5] = .5f * fSpringCons * data[1] * data[1];
new - indata = fSimData.storeData (data);
// Obtain new amplitude, omega, and spring constant
// values
fAmplitude = new - indata[0];
fOmega = new - indata[1];
fSpringCons = new - indata[2];
// new - indata[3] and new - indata[4] are ignored
if ((int)new - indata[5] == 1) halt ();
}
else {
// Set time negative indicating that the loop has
// finished
data[0] =-1.0f;
fSimData.storeData (data);
// Break out of the while loop
break;

}

Here we have set the time negative when the loop has finished as a signal to the
client that the simulation has completed normally.