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package 矩形与正方形（LSP）;
/**
* 姝ｆ柟褰㈢被锛堥潪 public锛?
* @author 方初阳
* @version 1.0
* @created 23-10月-2025 20:05:33
*/
class Square implements Shape {
private double side;
public Square(){
}
public void finalize() throws Throwable {
*
* @param side
public Square(double side){
@Override
public double getArea(){
return 0;
public void setSide(double side){
}//end Square
