Java has a documentation tool called Javadoc that you can use to generate well-formatted external documentation of your classes. Below is an example of a class that is documented in the Javadoc style; you can see the documentation that it generates here.
/**This class models a line in a two-dimensional space.
* @author CS133 Staff
*/
public class Line
{
private double slope;
private double yIntercept;
/**Constructs a Line by initializing the slope and
* yIntercept instance variables.
* @param slope The slope of this Line.
* @param yIntercept The y-coordinate of the y-intercept of this Line.
*/
public Line(double slope, double yIntercept)
{
}
/**Returns the x-intercept of this Line.
* @return This Line's x-intercept.
*/
public double getXIntercept()
{
}
/**Returns the y-intercept of this Line.
* @return This Line's y-intercept.
*/
public double getYIntercept()
{
}
/**Returns the slope of this Line.
* @return This Line's slope.
*/
public double getSlope()
{
}
/**Returns a String representation of this Line in
* y = mx + b format where m is the slope and b is the y-intercept.
* @return The equation of this Line.
*/
public String toString()
{
}
/**Changes the position of this Line by shifting it yShift units vertically
* @param yShift The number of units to shift the Line.
*/
public void shiftVertical(int yShift)
{
}
/**Changes this line to be its reflection in the line y = x.
*/
public void invert()
{
}
/**Treats this Line as a function and evaluates its y-value at the
* x-value given.
* @param xPosition The x-value at which to evaluate the function.
* @return The value of y when this Line passes through xPosition.
*/
public double evaluateAt(double xPosition)
{
}
}