Pass Efficiency Rating

/**
 * Given a quarterback's yards gained, passing attempts, and
 * interceptions, computes his Pass Efficiency Rating.
 *
 * @author Jim Glenn
 * @version 0.1 9/8/2003
 */
 
public class PassEfficiencyRating
{
	/**
	 * Computes a quaterback's PER.  Inputs for yards, attempts,
	 * and interceptions are hard-coded.
	 *
	 * @param args ignored
	 */
	 
	 public static void main(String[] args)
	 {
	 	// declare and initialize the inputs
		
		int yards = 200;
		int attempts = 20;
		int interceptions = 3;
		
		// compute PER
		
		double per = (double)(yards - interceptions * 40) / attempts;
		
		// display result
		
		System.out.println("PER = " + per);
	}
}

ERA (version 1)

/**
 * Given a pitchers's outs recorded and earned runs allowed,
 * computes that's pitchers ERA.
 *
 * @author Jim Glenn
 * @version 0.1 9/8/2003
 */
 
public class ERACalculator
{
	/**
	 * Computes a pitcher's ERA.  Inputs for outs and earned runs
	 * are hard-coded.
	 *
	 * @param args ignored
	 */
	 
	 public static void main(String[] args)
	 {
	 	// declare and initialize the inputs
		
		int outs = 200;
		int earnedRuns = 20;
		
		// compute era
		
		double era = earnedRuns / ((double)outs / 27);
		
		// display result
		
		System.out.println("ERA = " + era);
	}
}

ERA (version 2)

/**
 * Given a pitchers's innings pitched and earned runs allowed,
 * computes that's pitchers ERA.  Innings pitched are assumed to
 * be input in baseball style fractions (so 66.2 instead of 66 2/3).
 *
 * @author Jim Glenn
 * @version 0.1 9/8/2003
 */
 
public class ERACalculator2
{
	/**
	 * Computes a pitcher's ERA.  Inputs for outs and earned runs
	 * are hard-coded.
	 *
	 * @param args ignored
	 */
	 
	 public static void main(String[] args)
	 {
	 	// declare and initialize the inputs
		
		double innings = 66.2; // meaning 66 2/3
		int earnedRuns = 20;
		
		// split innings into whole and fractional parts
		
		int wholeInnings = (int)innings;
		int thirdsOfInnings = (int)((innings - wholeInnings) * 10 + 0.5);
		int outs = wholeInnings * 3 + thirdsOfInnings;

		// compute era
		
		double era = earnedRuns / ((double)outs / 27);
		
		// display result
		
		System.out.println("ERA = " + era);
	}
}

This code can also be downloaded from the files PassEfficiencyRating.java, ERACalculator.java, and ERACalculator2.java.