import java.util.*;
/**
* @author Matthew D. Hicks
*
*/
public class BasicTimer {
public static final int TYPE_CLOCK = 1;
public static final int TYPE_ELAPSED = 2;
public static final int TYPE_REMAINING = 3;
private int type;
private long start;
private long max;
public BasicTimer(int type) {
this.type = type;
start = System.currentTimeMillis();
}
public long getTime() {
if (type == TYPE_CLOCK) {
return System.currentTimeMillis();
} else if (type == TYPE_ELAPSED) {
return System.currentTimeMillis() - start;
} else if (type == TYPE_REMAINING) {
return max - (System.currentTimeMillis() - start);
}
throw new RuntimeException("Type does not match anything known: " + type);
}
public void setMax(long max) {
this.max = max;
}
public static void main(String[] args) throws Exception {
int type = TYPE_REMAINING;
BasicTimer timer = new BasicTimer(type);
timer.setMax(10000);
GregorianCalendar calendar = new GregorianCalendar();
while (true) {
Thread.sleep(1000);
if (type == TYPE_CLOCK) {
calendar.setTimeInMillis(timer.getTime());
System.out.println("Clock: " + calendar);
} else if (type == TYPE_ELAPSED) {
System.out.println("Elapsed: " + (timer.getTime() / 1000) + " seconds");
} else if (type == TYPE_REMAINING) {
System.out.println("Remaining: " + (timer.getTime() / 1000) + " seconds");
}
}
}
}
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