CS 145 Lecture 22 – Stopwatch
Agenda
- Paragraph.plot takes Image, not 2-D array
- PPMViewer
- lab gotchas
- other instances as parameters
- invoking object is not a parameter
- writing a Stopwatch
Code
NDeckerBurger.java
package prefinal;
public class NDeckerBurger {
private int nDecks;
private boolean hasCheese;
public static final int CALORIES_PER_DECK = 211;
public NDeckerBurger(int givenDeckCount) {
nDecks = givenDeckCount;
}
public NDeckerBurger(int givenDeckCount, boolean hasCheese) {
nDecks = givenDeckCount;
this.hasCheese = hasCheese;
}
public int getDeckCount() {
return nDecks;
}
public int getPickleCount() {
return 3 * nDecks;
}
public int getCheeseCount() {
if (hasCheese) {
return 1 * nDecks;
} else {
return 0;
}
}
public int getBunCount() {
return nDecks + 1;
}
public int getKetchupOunces() {
return nDecks;
}
public int getBaconCount() {
return 3 * nDecks;
}
public void fuse(NDeckerBurger other) {
nDecks += other.nDecks;
if (other.hasCheese) {
hasCheese = true;
}
}
public double getCalorieCount() {
return CALORIES_PER_DECK * getDeckCount() +
31 * getCheeseCount() +
10 * getPickleCount() +
27 * getBunCount() +
41 * getBaconCount() +
10 * getKetchupOunces() / 0.4;
}
}
Stopwatch.java
package prefinal;
import java.util.Scanner;
public class Stopwatch {
private long startTime;
private long endTime;
private boolean hasStarted;
private double seconds;
public Stopwatch() {
seconds = endTime - startTime;
hasStarted = false;
seconds = 0.0;
}
public void start() {
startTime = System.currentTimeMillis();
hasStarted = true;
}
public void stop() {
endTime = System.currentTimeMillis();
hasStarted = false;
}
/**
* Resets the stopwatch. If running, it continues running.
*/
public void reset() {
startTime = endTime = System.currentTimeMillis();
// endTime = System.currentTimeMillis();
// startTime = endTime;
seconds = 0.0;
}
public double getElapsedSeconds() {
seconds = (endTime - startTime) / 1000.0;
return seconds;
}
public static void main(String[] args) {
// System.out.println(System.currentTimeMillis());
Stopwatch ticker = new Stopwatch();
String zyx = "zyxwvutsrqponmlkjihgfedcba";
Scanner in = new Scanner(System.in);
System.out.print("Hit Enter when ready");
in.nextLine();
ticker.start();
String line = in.nextLine();
ticker.stop();
boolean isMatch = zyx.equals(line);
if (isMatch) {
System.out.println(ticker.getElapsedSeconds());
} else {
System.out.println("Sorry.");
}
}
}
Haiku
My game didn’t sell.
If one died, all died.
hitPoints was a static field.If one died, all died.