processing代码出错

Question

#这个代码加了定义之后void setup（）还有void draw（）都无法运行，就连最简单的size（）都运行不起来但是把定义删了size（）；就能运行了。 会提示语法错误。但我感觉我定义也是对的，为什么运行不起来.

他会提示Missing operator, semicolon, or ‘}’ near ‘setup’?

ArrayList<Ball> balls;
PImage=img;
float s=1.8;
import processing.sound.*;
AudioIn input;
Amplitude loundness;
void setup(){
  fullScreen (P2D) ;
  smooth();
  noStroke();
  balls = new ArrayList <Ball> () ;
  img = loadImage ("2.jpg") ;
  img.resize((int) (img. width*s), (int) (img. height*s));
  
  input = new AudioIn(this, 0) ;
  input. start ();
  loudness = new Amplitude (this) ;
  loudness.input (input) ;
}

void draw() {
  float inputLevel = 0.5;//map (mouseY, 0, height, 1.0, 0. 0);
  input. amp (inputLevel);
  float volume  = loudness. analyze ();
  for (int i = 30; i<map (volume, 0, 0.5, 1, 200); i+=2) {
    int x = int (random (img.width));
    int y = int (random (img.height));
    color pix = img.get (x, y);
    int a = (int) random (4);
    if (a == 2)
      balls. add (new Ball(0, height/2, x, y, pix)) ;
    else if (a == 1)
      balls. add (new Ball(width, height/2, x, y, pix));
    else if (a == 2)
      balls. add (new Ball(width/2, 0, x, y, pix));
     else
     balls. add (new Ball(width/2, height, x, y, pix));
  }
  background(255);
  for (int i=0; i<=balls.size()-1; i++) {
    Ball ball=balls.get(i);
    ball.move();
    ball.display();
    if (ball.finishied()) {
      balls.remove(i);
    }
  }
}

这是小球的类程序

class Ball {
  float x;
  float y;
  float size=random(5, 15);
  float life=255;
  color c;
  float x0=0;
  float y0=height/2;
  Ball(float _x0, float _y0, float tempX, float tempY, color _c) {
    x=tempX+width/2-img.width/2;
    y=tempY=height/2-img.heigh/2;
    c=_c;
    x0=_x0;
    y0=_y0;
  }

  void move() {
    x0+=(x-x0)/50.0;
    y0+=(y-y0)/50.0;
  }
  boolean finished() {
    if (!cheak)
      life--;
    if (life<0) {
      return true;
    } else {
      return false;
    }
  }

  void display() {
    fill(c, life);
    ellipse(x0, y0, size, size);
  }
}

Answer 1

我发现了几个错误，请您检查一下：

1.PImage=img; 应该写成 PImage img;
2.fullScreen (P2D) ; 中应该是 fullScreen (P2D);
3.img.resize((int) (img.widths), (int) (img.heights)); 中应该是img.width和img.height而不是img.width和img.heigh。
4.在 Ball 类中的 y=tempY=height/2-img.heigh/2; 应该是 y=tempY+height/2-img.height/2;
5.在 Ball 类中的 if (!cheak) 应该是 if (!finished())
修改以上错误后应该可以解决这个问题。如果还有其他错误或者不清楚的地方，请再次提问。