编译代码时遇到问题。当分数达到500或以上时，我想让我的“Win”图像弹出，但是我收到了这个错误：
“不兼容的类型：int无法转换为分数”
问题出在我的“private void LevelUp”（）“
之下这是我的代码：
import greenfoot.*;
/**
* Write a description of class MinionWorld here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class MinionWorld extends World
{
private long startMillis = 0;
private int numFrames = 0;
private final int groundHeight;
public static final double MAX_FORCE = 11;
public static final double MIN_FORCE = 7;
public static final double GRAVITY = 0.15;
public static final int LOWEST_ANGLE = 30;
private Player[] players;
private int curPlayer;
private int turnCountdown;
private int value;
Score score;
Banan Banan;
private int time, target;
public static int poin, level;
/**
* Constructor for objects of class Banana.
*
*/
public MinionWorld()
{
// Create a new world with 600x400 cells with a cell size of 1x1 pixels.
super(800, 500, 1, false);
groundHeight = 440;
players = new Player[] {new Minion()};
int x = getWidth() / 2;
for (Player p : players)
{
addObject(p, x, groundHeight);
}
curPlayer = 0;
turnCountdown = 10;
time = 1800;
poin = 0;
level = 1;
target = 150;
Greenfoot.setSpeed(50);
prepare();
}
private void showTime()
{
showText("Time: " + time/60, 700, 20);
}
private void showTarget()
{
showText("Target: "+target, 714, 50);
}
private void showLevel()
{
showText("Level: "+level, 50, 20);
}
private void countTime()
{
showTime();
if(time>0)
{
time--;
}
if (time == 0)
{
LevelUp();
}
}
private void lvup()
{
LvlUp LvlUp = new LvlUp();
addObject(LvlUp,400,250);
Greenfoot.delay(200);
removeObject(LvlUp);
}
private void win()
{
Win Win = new Win();
addObject(new Win(),400,250);
Greenfoot.delay(200);
}
public void started()
{
numFrames = 0;
startMillis = System.currentTimeMillis();
}
private double t;
public void act()
{
numFrames += 1;
t = getTimePerFrame();
if (turnCountdown > 0)
{
turnCountdown -= 1;
if (turnCountdown == 0)
{
players[curPlayer].startTurn();
}
}
countTime();
showTarget();
showLevel();
}
public void changeScore(int nilai)
{
if(score!=null)
{
score.setScore(nilai);
}
}
public double getTimePerFrame()
{
return (double)(System.currentTimeMillis() - startMillis) / (1000.0 * (double)(numFrames));
}
public boolean hitsGround(double startX, double startY, double endX, double endY)
{
return endY > groundHeight;
}
public void landed()
{
curPlayer = (curPlayer + 1) % players.length;
turnCountdown = 10;
}
private void LevelUp()
{
{
if(poin>=target)
{
level++;
if (level==2)
{
lvup();
time=1800;
target=350;
}
if (level==3)
{
lvup();
time=1800;
target=500;
}
}
else
{
if (score = 500)
{
Greenfoot.stop();
addObject(new Win(), 400,200);
}
else
{
addObject(new GameOver(),400,200);
addObject(new TryAgain(),360, 320);
addObject(new Exit(),460,320);
}
}
}
}
/**
* Prepare the world for the start of the program. That is: create the initial
* objects and add them to the world.
*/
private void prepare()
{
Menu Menu = new Menu();
Greenfoot.setWorld(Menu);
score = new Score();
Minion Minion = new Minion();
addObject(Minion, 373, 435);
Minion.setLocation(461, 400);
removeObject(Minion);
Evil1 evil1 = new Evil1();
addObject(evil1, 697, 212);
evil1.setLocation(577, 223);
Evil2 evil2 = new Evil2();
addObject(evil2, 259, 58);
evil2.setLocation(695, 63);
evil2.setLocation(693, 53);
Evil3 evil3 = new Evil3();
addObject(evil3, 742, 322);
evil3.setLocation(575, 321);
evil3.setLocation(323, 305);
evil3.setLocation(573, 319);
Evil4 evil4 = new Evil4();
addObject(evil4, 92, 117);
evil4.setLocation(92, 111);
Score score = new Score();
addObject(score, (697), 168);
score.setLocation(757, 247);
score.setLocation(561, 163);
score.setLocation(463, 124);
}
}
以下是我的Score类的代码：
import greenfoot.*;
public class Score extends Actor
{
/**
* Act - do whatever the Score wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public Score(){
GreenfootImage gfi = new GreenfootImage(200,200);
gfi.setColor(java.awt.Color.white);
gfi.setFont(new java.awt.Font("Las Vegas",java.awt.Font.PLAIN, 36));
gfi.drawString("0", 30, 30);
setImage(gfi);
}
public void setScore(int score)
{
GreenfootImage gfi = getImage();
gfi.clear();
gfi.drawString(score + "", 30,30);
setImage(gfi);
}
//just a little settlement
public void act()
{
if(MinionWorld.poin>9)
{
setLocation(445, getY());
}
}
}
“移动”类代码：
import greenfoot.*;
/**
* Write a description of class Move here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Move extends Actor
{
int q = 0;
private int Evil = 0;
/**
* Act - do whatever the Fly wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
}
public void flyy()
{
if (getX() == 0 || getX() == 799)
{
setLocation(getX(), 50+Greenfoot.getRandomNumber(320));
turn(180);
this.getImage().mirrorVertically();
q++;
}
}
public void right()
{
move(3/2);
}
public void left()
{
move(-3/2);
}
public void touch1()
{
if(isTouching(Banan.class))
{
MinionWorld MinionWorld = (MinionWorld) getWorld();
MinionWorld.poin = MinionWorld.poin + 10;
MinionWorld.changeScore(MinionWorld.poin);
removeTouching(Evil1.class);
setLocation(799, 50+Greenfoot.getRandomNumber(320));
left();
}
}
public void touch2()
{
if(isTouching(Banan.class))
{
MinionWorld MinionWorld = (MinionWorld) getWorld();
MinionWorld.poin = MinionWorld.poin + 10;
MinionWorld.changeScore(MinionWorld.poin);
removeTouching(Evil2.class);
setLocation(0, 50+Greenfoot.getRandomNumber(320));
right();
}
}
public void touch3()
{
if(isTouching(Banan.class))
{
MinionWorld MinionWorld = (MinionWorld) getWorld();
MinionWorld.poin = MinionWorld.poin + 10;
MinionWorld.changeScore(MinionWorld.poin);
removeTouching(Evil3.class);
setLocation(799, 50+Greenfoot.getRandomNumber(320));
left();
}
}
public void touch4()
{
if(isTouching(Banan.class))
{
MinionWorld MinionWorld = (MinionWorld) getWorld();
MinionWorld.poin = MinionWorld.poin + 10;
MinionWorld.changeScore(MinionWorld.poin);
removeTouching(Evil4.class);
setLocation(0, 50+Greenfoot.getRandomNumber(320));
right();
}
}
public void nulled2()
{
if (getWorld().getObjects(Evil2.class).isEmpty())
{
getWorld().addObject(new Evil2(), 0, 50+Greenfoot.getRandomNumber(320));
right();
}
}
public void nulled4()
{
if (getWorld().getObjects(Evil4.class).isEmpty())
{
getWorld().addObject(new Evil4(), 0, 50+Greenfoot.getRandomNumber(320));
right();
}
}
public void flyback1()
{
if(getX()<-15)
{
setLocation(800, 50+Greenfoot.getRandomNumber(320));
}
if(getX()>815)
{
setLocation(799, 50+Greenfoot.getRandomNumber(320));
turn(180);
this.getImage().mirrorVertically();
}
}
public void flyback2()
{
if(getX()<-35)
{
setLocation(0, 50+Greenfoot.getRandomNumber(320));
turn(180);
this.getImage().mirrorVertically();
}
if(getX()>834)
{
setLocation(0, 50+Greenfoot.getRandomNumber(320));
}
}
}
答案 0 :(得分：0)
对于评论来说这有点太长了所以我会在这里发布。
您很可能错过以下内容：
field课程中的Score。getter。if (score = 500)并将其更改为if (score.getScore() == 500)。基本上是这样的：
public class Score extends Actor {
private int score;
public void setScore(int score) {
this.score = score;
...
}
public int getScore() {
return this.score;
}
}
答案 1 :(得分：0)
您缺少分数字段。你的课应该是这样的：
public class Score extends Actor
{
private int score;
public int getScore(){
return score;
}
/**
* Act - do whatever the Score wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public Score(){
GreenfootImage gfi = new GreenfootImage(200,200);
gfi.setColor(java.awt.Color.white);
gfi.setFont(new java.awt.Font("Las Vegas",java.awt.Font.PLAIN, 36));
gfi.drawString("0", 30, 30);
setImage(gfi);
}
public void setScore(int score)
{
GreenfootImage gfi = getImage();
gfi.clear();
this.score += score;
gfi.drawString(this.score + "", 30,30);
setImage(gfi);
}
//just a little settlement
public void act()
{
if(MinionWorld.poin>9)
{
setLocation(445, getY());
}
}
}
然后你的if应该是：
if(score.getScore() == 500){
//doStuff
}