我不断收到错误消息：无法找到或加载主类，无法找出原因？

Question

I am extremely brand new at coding and trying to teach myself some tricks, but they arent working. Here is my code, someone told me that my braces may be wrong but I cant understand why it wont compile. I keep getting the Error:Could not find or load main class. Perhaps I am accessing it incorrectly? Thank you in advance for helping me learn how to do this correctly.

public class Point3D {
    public int x;
    public int y;
    public int z;

    public Point3D (int xAxis, int yAxis, int zAxis) {
    }
    public int getxAxis (int x) {
        return x;
    }
    public int getyAxis (int y) {
        return y;
    }
    public int getzAxis (int z) {
        return z;
    }
    public void setx(int xAxis){
        this.x = xAxis;
    }
    public void sety(int yAxis){
        this.y = yAxis;
    }
    public void setz(int zAxis){
        this.z = zAxis;
    }
    public int getDistanceToOrigin (int x, int y, int z, int x1, int y1, int z1) {
        return getDistanceToOrigin = ((int x1-int x); (int y1-int y); (int z1-int z));
    }
    public int getDistance (int x, int y, int z, int x1, int y1, int z1) {
        return getDistance = ((5 - int x); (7 - int y); (9-int z));
    }

    public void howFar (){
        System.out.println ("Your original point is at: " 
                 +Point3D +"and is: " +getDistanceToOrigin +" away from the "
                 + "origin of 0, 0, 0");
    }
    public static void main(String[] args) {
        Point3D location = new Point3D();
            location.setx(3);
            location.sety(2);
            location.setz(1);
            location.getDistance();
            location.howFar();
    }
}

Answer 1

Mistakes

1.make your variables private if you are accessing them from getter/setters.

public int x;
public int y;
public int z;

2. Default constructors

   Point3D location = new Point3D(); this will make a call to the default constructor but in your case there is none. This will also create an error. Either create a default constructor or make objects like
   Point3D location = new Point3D(1,2,3);

3. Mistake 3(Dont know what are yr trying to do here )

   public int getDistanceToOrigin (int x, int y, int z, int x1, int y1, int z1) {

     return getDistanceToOrigin = ((int x1-int x); (int y1-int y); (int z1-int z)); } public int getDistance (int x, int y, int z, int x1, int y1, int z1) { return getDistance = ((5 - int x); (7 - int y); (9-int z)); } 

return getDistanceToOrigin = ((int x1-int x); (int y1-int y); (int z1-int z)); A return statement can return only one thing, it cannot have ; in between it will return only one interger value, if you want to return two or more numbers then you may have to return an array of numbers.