AdiBak wrote...
I understand, but how would I ask the question if it's null?
AdiBak wrote ...
2019/4/12
Powerup Problem
I am not sure what you mean. Maybe you do not understand. The if statement I gave should properly restrict the asking of the question to (1) not yet asked; and (2) points greater than 6000.
Another thing is this -- you cannot use '==' to compare contents of String objects. That will only check to see if they are one in the same object. To compare the contents, use the equals method:
if ("normal".equals(question))
He provided code for everything he mentioned.
I meant if you could please show how I can use this in my code, since I'm not sure how...
I don't know what was unclear…
private String question = null;
//...
if (question == null && w.getScore() > 6000)
{
w.setPower(false);
question = Greenfoot.ask("What powerup would you like (normal, points, power)?");
if ("normal".equals(question))
{
w.setNormal(true);
}
else if ("points".equals(question))
{
w.setPointPowerup(true);
}
else if ("power".equals(question))
{
w.setPower(true);
}
}I tried the above code, but upon clicking "ok", the prompt still wouldn't go away.
Show the full code of the class.
import greenfoot.*;
import java.util.List;
/**
* Write a description of class GameState here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class GameState extends State
{
MyWorld w = ((MyWorld)getWorld());
public int yPosition = getWorld().getHeight() * 4/5;
Score j = new Score();
GreenfootSound backMusic = new GreenfootSound("YouAreCreed.wav");
private int numSegments = 10;
private int numToDestroyForFlea = 10;
private int numToDestroyForScorpion = 15;
public GameState(MyWorld w){
super(w);
backMusic.playLoop();
}
public void onSet(){
MyWorld q = ((MyWorld)getWorld());
q.setLvl(1);
w.setGameOver(false);
Player player = new Player();
getWorld().addObject(player, getWorld().getWidth()/2, getWorld().getHeight() - player.getImage().getHeight()/2);
Spider s = new Spider();
getWorld().addObject(s, s.getImage().getWidth()/2, getWorld().getHeight() - s.getImage().getHeight()/2);
for (int i = 0; i < 10; i++){
Centipede centipede = new Centipede();
getWorld().addObject(centipede, getWorld().getWidth()/2 - centipede.getImage().getWidth() * i, centipede.getImage().getHeight()/2);
}
for (int i = 0; i < 42; i++){
int x = Greenfoot.getRandomNumber(getWorld().getWidth());
int y = Greenfoot.getRandomNumber(getWorld().getHeight());
Mushroom mushroom = new Mushroom();
if (getWorld().getObjectsAt(x, y, Mushroom.class).size() == 0 && (y >= 20 && y <= getWorld().getHeight() - player.getImage().getHeight())){
getWorld().addObject(mushroom, x, y);
mushroom.goToGrid();
}
}
j.setText(w.getScore());
j.setSize(MyWorld.GRIDSIZE);
j.setOutLColor(null);
getWorld().addObject(j, j.getImage().getWidth(), j.getImage().getHeight()/2);
}
public void addFlea(){
for (int i = 0; i < 1; i++){
Flea f = new Flea();
getWorld().addObject(f, Greenfoot.getRandomNumber(getWorld().getWidth()), -f.getImage().getHeight());
}
}
public void addScorpion(){
for (int i = 0; i < 1; i++){
//if (w.getScore() > 0 && w.getScore() <= ){
Scorpion sco = new Scorpion();
getWorld().addObject(sco, 0, Greenfoot.getRandomNumber(getWorld().getHeight()/3));
//}
/*if (w.getLvl() > 3 && w.getLvl() <= 5){
Arachnoid a = new Arachnoid();
getWorld().addObject(a, 0, Greenfoot.getRandomNumber(getWorld().getHeight()/4));
}*/
}
}
public void snapAllToGrid(){
List<Mushroom> plant = getWorld().getObjects(Mushroom.class);
for (int i = 0; i < plant.size(); i++){
Mushroom fungi = plant.get(i);
fungi.goToGrid();
}
}
public void onRemove(){
// Remove anything when state is changed
List <Actor> all = getWorld().getObjects(Actor.class);
getWorld().removeObjects(all);
}
public void checkFleas(){
if (w.getDestroyed() == numToDestroyForFlea){
numToDestroyForFlea += 10;
addFlea();
}
}
public void checkScorpions(){
if (w.getDestroyed() == numToDestroyForScorpion){
numToDestroyForScorpion += 15;
addScorpion();
}
}
public void onAct(){
// Do what happpens in the state. Check if needs to be changed
if (getWorld() != null){
checkFleas();
checkScorpions();
}
if (getWorld().getObjects(Centipede.class).isEmpty()){
Greenfoot.delay(15);
w.setLvl(w.getLvl() + 1);
for (int i = 0; i < 10; i++){
Centipede centipede = new Centipede();
//centipede.setDx(centipede.getDx() + 1);
getWorld().addObject(centipede, getWorld().getWidth()/2 - centipede.getImage().getWidth() * i, centipede.getImage().getHeight()/2);
}
Centipede c = new Centipede();
getWorld().addObject(c, getWorld().getWidth() - c.getImage().getWidth() * 2, c.getImage().getHeight()/2);
List<Mushroom> cacti = getWorld().getObjects(Mushroom.class);
for (int i = 0; i < cacti.size(); i++){
Mushroom food = cacti.get(i);
food.getImage().setTransparency(255);
food.goToGrid();
}
Spider s = new Spider();
getWorld().addObject(s, s.getImage().getWidth()/2, getWorld().getHeight() - s.getImage().getHeight()/2);
if (getWorld() != null){
checkFleas();
checkScorpions();
}
}
if (w.getScore() > 0 && w.getScore() <= 2000){
w.setNormal(true);
}
if (w.getScore() > 2000 && w.getScore() <= 4000){
w.setNormal(false);
w.setPointPowerup(true);
}
if (w.getScore() > 4000 && w.getScore() <= 6000){
w.setPointPowerup(false);
w.setPower(true);
}
String question = null;
//...
if (question == null && w.getScore() > 6000)
{
w.setPower(false);
question = Greenfoot.ask("What powerup would you like (normal, points, power)?");
if ("normal".equals(question))
{
w.setNormal(true);
}
else if ("points".equals(question))
{
w.setPointPowerup(true);
}
else if ("power".equals(question))
{
w.setPower(true);
}
}
if (getWorld().getGameOver() == true){
if (backMusic.isPlaying()){
backMusic.stop();
}
Score txt = w.getObjects(Score.class).get(0);
w.setScore(w.getScore() - w.getScore());
txt.setText("Score: " + w.getScore());
getWorld().setState(new GameOverState(getWorld()));
w.setLvl(1);
}
}
}
i started with "private":
This should tell you that you should move this line outside methods, so for example in line 12 (around there).
private String question = null;
Here's why there are State classes (please view):
https://docs.google.com/presentation/d/1kg-rlnzxauaekj9QWt39jZQDunYA0vUAcHeNeu0HN9w/edit?usp=sharing
Yeah, it is still totally useless, but if it is your task to do it like that, you don't have a choice, I guess.
Does it work now?
I have another question -- how can I make it so that whenever the user presses a certain key, say, "control", that question pops up and he/she gets to choose the powerup?
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