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package jichuti;
/**
* 正方形类（实现Shape接口）
*/
public class Square implements Shape {
private String color; // 颜色
private double side; // 边长
public Square(String color, double side) {
this.color = color;
this.side = side;
}
@Override
public String getColor() {
return color;
public double getArea() {
return side * side; // 正方形面积=边长×边长
// getter和setter
public double getSide() { return side; }
public void setSide(double side) { this.side = side; }
