为什么会出现这种错误的？

Question

import examples.has.geom.Rectangle;
import examples.has.geom.Circle;
package examples.has.geom;
public class Geometry{
private Rectangle rect;
private Circle circle;
Geometry(Rectangle rect,Circle circle){
this.rect=rect;
this.circle=circle;
}
public void setCirclePosition(double x,double y){
circle.setX(x);
circle.setY(y);
}
public void setCircleRadius(double radius){
circle.setRadius(radius);
}
public void setRectanglePosition(double x,double y){
rect.setX(x);
rect.setY(y);
}
public void setRectangleWidthAndHeight(double w,double h){
rect.setWidth(w);
rect.setHeight(h);
}
public void showState(){
double circleX=circle.getX();
double rectX=rect.getX();
if(rectX-circleX==circle.getRadius()*2)
System.out.println("图中的矩形在圆的右侧");
if(circleX-rectX==rect.getWidth()){
System.out.println("图中的矩形在圆的左侧");
}
}
}

另外两个Circle和Retangle的class.java我已经放好了且环境变量也设定好了

Answer 1

package 语句应该放在源文件的第一行

package examples.has.geom;