File	Doc	Category	Size	Date	Package
SubstitutionConstants.java	API Doc	Example	2616	Sun Dec 14 22:47:38 GMT 2003	oreilly.hcj.constants

SubstitutionConstants

• java.lang.Object

Fields Summary
private static final Logger	LOGGER Holds the logging instance.
public static final double	PI A value for PI.

Constructors Summary

Methods Summary
protected java.lang.String	buildLogMessage(java.lang.Exception ex) Builds a log message from an exception. param ex The exception to use to build the message. return The constructed message. StringBuffer buf = new StringBuffer(200); StackTraceElement[] elements = ex.getStackTrace(); buf.append("The exception "); buf.append(ex.getClass().getName()); buf.append(" occurred at "); buf.append(Calendar.getInstance().getTime().toString()); buf.append(" on line "); buf.append(elements[0].getLineNumber()); return buf.toString();
public float	calculateInterest(float rate, float principal) Calculate interest for one time period on the principal. param rate The interest rate. param principal The principal. return The calculated interest. throws IllegalArgumentException If the interest is less than 0.0; final String LOG_MSG1 = "Rate cannot be less than "; final String LOG_MSG2 = ". The rate input = "; final double MIN_INTEREST = 0.0; // -- if (rate < MIN_INTEREST) { LOGGER.error(LOG_MSG1 + MIN_INTEREST + LOG_MSG2 + rate); throw new IllegalArgumentException("rate"); } return principal * rate;
public double	getCircleArea(double radius) Calculate the area of the circle with the given radius. param radius The radius of the circle. return The calculated area. double area = (Math.pow(radius, 2) * PI); LOGGER.debug("The calculated area is " + area); return area;