Stopwatch.java

package com.osroyale.util;
 
import java.util.concurrent.TimeUnit;

 
public final class Stopwatch {
 
    private long cachedTime;
 
    public Stopwatch() {
        cachedTime = System.nanoTime();
    }
 
    public static Stopwatch start() {
        return new Stopwatch();
    }
 
    @Override
    public String toString() {
        return String.format("STOPWATCH[elapsed=%d]", elapsedTime());
    }
 
    public Stopwatch reset() {
        cachedTime = System.nanoTime();
        return this;
    }
 
    public Stopwatch reset(int delay, TimeUnit unit) {
        cachedTime = System.nanoTime() + TimeUnit.NANOSECONDS.convert(delay, unit);
        return this;
    }
 
    public Stopwatch reset(long millis) {
        cachedTime = System.nanoTime() + TimeUnit.NANOSECONDS.convert(millis, TimeUnit.MILLISECONDS);
        return this;
    }
 
    public long elapsedTime(TimeUnit unit) {
        return unit.convert(System.nanoTime() - cachedTime, TimeUnit.NANOSECONDS);
    }
 
    public boolean finished() {
        return cachedTime - System.nanoTime() <= 0;
    }
 
    public long elapsedTime() {
        return elapsedTime(TimeUnit.MILLISECONDS);
    }
 
    public boolean elapsed(long time, TimeUnit unit) {
        return elapsedTime(unit) >= time;
    }
 
    public boolean elapsed(long time) {
        return elapsed(time, TimeUnit.MILLISECONDS);
    }
 
    public long getCachedTime() {
        return cachedTime;
    }
 
    public void setCachedTime(long cachedTime) {
        this.cachedTime = cachedTime;
    }
 
}