GeometricObject

最新推荐文章于 2022-07-11 22:50:10 发布

转载最新推荐文章于 2022-07-11 22:50:10 发布 · 6.3k 阅读

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#java #abstract class

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本文介绍了一个用于表示几何对象的抽象类，包括颜色、填充状态和创建日期的属性，以及获取和设置这些属性的方法。

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import java.util.Date;

public abstract class GeometricObject {
    private String color = "white";
    private boolean filled;
    Date dateCreated;

    protected GeometricObject() {
        dateCreated = new Date();
    }

    protected GeometricObject(String color, boolean filled) {
        this.color = color;
        this.filled = filled;
        Date dateCreated = new Date();
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    public boolean isFilled() {
        return filled;
    }

    public void setFilled(boolean filled) {
        this.filled = filled;
    }

    public Date getDateCreated() {
        return dateCreated;
    }

    public String toString() {
        return "Created on " + dateCreated + "\ncolor " + color +
                " and filled" + filled;
    }

    public abstract double getArea();

    public abstract double getPerimeter();
}