public class Test {
public static void main(String[] args) {
// 实例化2个父类对象，传入两组相同的参数值
        Fruits f1 = new Fruits("圆","甜");
        Fruits f2 = new Fruits("圆","甜");
        // 调用父类eat方法
        f1.eat();
        // 测试重写equals方法，判断两个对象是否相等
        Boolean flag = f1.equals(f2);
        System.out.println("frut1和frut2的引用比较:" + flag);
        System.out.println("————————————————————————————————————————");
        // 实例化子类对象，并传入相关参数值
        Waxberry waxberry = new Waxberry("圆形","酸甜适中","紫红色");
        // 调用子类face方法和eat方法
        waxberry.face();
        waxberry.eat();
        // 测试重写toString方法，输出子类对象的信息
        System.out.println(waxberry.toString());
        System.out.println("——————————————————————————————————————————————");
        // 实例化Banana类对象，并传入相关参数值
        Banana banana = new Banana("短而稍圆","果肉香甜","仙人蕉");
        // 调用子类的advantage和它的重载方法
        banana.advantage();
        banana.advantage("黄色");
    }
}

public class Fruits {
private String shape;
    private String taste;

    /**
     * eat方法
     */
    public void eat() {
        System.out.println("水果可供人们食用!");
    }

/**
     * 重写Object的equals方法
     * @param object 对象
     * @return boolean
     */
    public boolean equals(Object object) {
if (object == null) {
return false;
        }
        Fruits fruits = (Fruits) object;
        if (fruits.getShape().equals(this.getShape()) && fruits.getTaste().equals(this.getTaste())) {
return true;
        }else {
return false;
        }
    }

/**
     * 无参构造
     */
    public Fruits() {
    }

/**
     * 全参构造
     * @param shape 形状
     * @param taste 味道
     */
    public Fruits(String shape, String taste) {
this.shape = shape;
        this.taste = taste;
    }

public String getShape() {
return shape;
    }

public void setShape(String shape) {
this.shape = shape;
    }

public String getTaste() {
return taste;
    }

public void setTaste(String taste) {
this.taste = taste;
    }
}

public final class Waxberry extends Fruits{
private String color;

    public final void face() {
        String str = "杨梅:"+this.getColor()+","+this.getShape()+",果味酸甜适中。";
        System.out.println(str);
    }

public void eat() {
        System.out.println("杨梅酸甜适中,非常好吃!");
    }

public String toString() {
        String str = "杨梅的信息:果实为"+this.getShape() + "," + this.getColor() + "," + this.getTaste()+",非常好吃!";
        return str;
    }

public Waxberry() {
    }

public Waxberry(String shape, String taste, String color) {
super(shape, taste);
        this.setColor(color);
    }

public String getColor() {
return color;
    }

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

public class Banana extends Fruits{
private String variety;

    public void advantage() {
        String str = this.getVariety() + "果形" + this.getShape() + ",果肉香甜,可供生食。";
        System.out.println(str);
    }

public void advantage(String color) {
        String str = this.getVariety()+"颜色为"+color;
        System.out.println(str);
    }

public Banana() {
    }

public Banana(String shape, String taste, String variety) {
super(shape, taste);
        this.setVariety(variety);
    }

public String getVariety() {
return variety;
    }

public void setVariety(String variety) {
this.variety = variety;
    }
}