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package 矩形与正方形（LSP）;
/**
* 褰㈢姸鎺ュ彛锛堥潪 public锛屽彲鏀惧湪鍚屼竴鏂囦欢锛?
* @author 方初阳
* @version 1.0
* @created 23-10月-2025 20:05:46
*/
interface Shape {
public double getArea();
}
