Question

我得到了＃34;无法编译的源代码 - 错误的树类型＆＃34;错误和＆＃34;不能找到符号＆＃34;错误我关闭编译保存，现在得到无法找到符号。似乎打破它的区域是我在AsteroidFields生成方法中初始化Asteroid（）的地方，所以我觉得我的初始化是不正确的但我还没有弄清楚如何。

package asteroidfield;
import java.util.TreeSet;
import blobzx.BlobGUI;
import blobzx.SandBox;
import blobzx.SandBoxMode;



public class AsteroidField implements BlobGUI {

    SandBox ast;

    public static void main (String [] Args){
        new AsteroidField();       
    }

    public AsteroidField (){
        ast = new SandBox();

        ast.setSandBoxMode(SandBoxMode.FLOW);   
        ast.setFrameRate(15);
        ast.init(this);

    }

    @Override
    public void generate() {
       // This is the line that is breaking the code.   
         Asteroid asteroid = new Asteroid();

    }

}








    package AsteroidField;

    import blobzx.BlobUtils;
    import blobzx.PolyBlob;
    import java.awt.Point;


    import java.util.Random;


    public class Asteroid extends PolyBlob{

    // private static Random random = new Random();

    public Asteroid(int velX, int velY, double rot) {

       super(-100, -100, rot);

       setDelta(velX, velY);

       Random sides = new Random();
       Random dist = new Random();
       int si = sides.nextInt(9 - 5 + 1) + 5;

       int di =  dist.nextInt(15 - 5 + 1) + 5;

       double region = (2 * Math.PI) / si;                 
       double []angle = new double [si];

       int [] xInt = new int[si];
       int [] yInt = new int[si];
       double [] x = new double [si];
       double [] y = new double [si];
       System.out.print("m");



       for(int i = 0; i < si; i++){


        angle[i] = (i*region)+(Math.random()*region);        
        Point cord = BlobUtils.rotatePoint(di, angle[i]);

        x[i] = cord.getX();
        y[i] = cord.getY();
       }
       for (int i = 0; i > x.length; i ++){
        xInt[i] = (int) x[i];
        yInt[i] = (int) y[i];
       }


       setPolygon(xInt, yInt);


       }
      }

Answer 1

我看到两个问题：

1）可能因为，你写道：

Asteroid asteroid = new Asteroid();

但是Asteroid类没有默认的construstor（至少，我没有在你的代码中看到它）

public Asteroid(int velX, int velY, double rot) {

2）或者可能是因为你使用的不是同一个包而不是在AsteroidField中使用import

package asteroidfield;
...
package AsteroidField;

你应该或使用一个包或添加导入AsteroidField.Asteroid;在AsteroidField中，我想。

Answer 2

重新检查所有类中的包声明！

在NetBeans中观察到此行为，当包的某个类中的包声明引用不存在或错误的包时。 NetBeans通常会检测并突出显示此错误，但已知失败并误导性地报告包没有错误，但事实并非如此。

无法编译的源代码 - 错误的树类型错误，无法找到符号错误

2 个答案: