Timer.java

package util;

/** Calculates time in millisecs for program execution.
 * 
 * @author ntandon
 * @version1.0
 * @since 15.01.2010 */
public class Timer {

	public long mStartTime;
	public double totalTime;

	public Timer() {
		this.totalTime = 0.0;
		this.mStartTime = System.currentTimeMillis();
	}

	public void reset() {
		this.mStartTime = System.currentTimeMillis();
	}

	public void reset(boolean resetTotalTime) {
		if (resetTotalTime)
			this.totalTime = 0.0;
		reset();
	}

	public double time(String msg) {
		return time(msg, false);
	}

	public double time(String msg, boolean mute) {
		long endTime = System.currentTimeMillis();
		double totalTime = (endTime - mStartTime) / 1000.0;
		if (!mute)
			System.out.println("  " + msg + "  done(" + totalTime + " sec.)");
		reset();
		return totalTime;
	}

	public double time() {
		long endTime = System.currentTimeMillis();
		double totalTime = (endTime - mStartTime) / 1000.0;
		System.out.println("  done(" + totalTime + " sec.)");
		reset();
		return totalTime;
	}

	public double timeSpan() {
		long endTime = System.currentTimeMillis();
		double totalTime = (endTime - mStartTime) / 1000.0;
		return totalTime;
	}

	public static void calculate(long startTime) {
		long endTime = System.currentTimeMillis();
		double totalTime = (endTime - startTime) / 1000;
		System.out.println("\ndone (" + totalTime + " seconds)");
	}

	public static void calculate(long startTime, String message) {
		long endTime = System.currentTimeMillis();
		double totalTime = (endTime - startTime) / 1000;
		System.out.println(message + totalTime);
	}

	public static void calculateMemory() {
		long free = Runtime.getRuntime().freeMemory();
		long max = Runtime.getRuntime().maxMemory();
		long tot = Runtime.getRuntime().totalMemory();
		System.out.println("Total Memory snapshot:\nfree= " + free + "\t max= "
			+ max + "\t total= " + tot);
	}
}