​Fruits 类

package com.immoc.jjicheng4;

public class Fruits {

private String shape;

private String taste;

public Fruits() {

}

public Fruits(String shape, String taste) {

this.setShape(shape);

this.setTaste(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 void eat() {

System.out.println("水果可供人们食用！");

}

public boolean equals(Object obj) {

if (obj == null)

return false;

Fruits temp = (Fruits) obj;

if ((this.getShape().equals(temp.getShape())) && (this.getTaste().equals(temp.getTaste())))

return true;

else

return false;

}

}

Waxberry类

package com.immoc.jjicheng4;

final public class Waxberry extends Fruits {

private String color;

public String getColor() {

return color;

}

public void setColor(String color) {

this.color = color;

}

public Waxberry() {

}

public Waxberry(String shape, String taste, String color) {

super(shape, taste);

this.setColor(color);

}

final public void face() {

System.out.println("杨梅：" + this.getColor() +"、" +this.getShape() + "，果味" + this.getTaste()+"。");

}

@Override

public void eat() {

System.out.println("杨梅酸甜适中，非常好吃！");

}

public String toString() {

return "杨梅的信息：果实为" + this.getShape() + this.getColor() + this.getTaste() + "非常好吃！";

}

}

Banana类

package com.immoc.jjicheng4;

public class Banana extends Fruits {

private String variety;

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;

}

public void advantage() {

System.out.println(this.getVariety() + "果形" + this.getShape() + "，" + this.getTaste() + "，可供生食。");

}

public void advantage(String color) {

System.out.println(this.getVariety() + "颜色为" + color);

}

}

Test类

package com.immoc.jjicheng4;

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 fru1 = new Fruits("圆形", "甜");

Fruits fru2 = new Fruits("圆形", "甜");

// 调用父类eat方法

fru1.eat();

// 测试重写equals方法，判断两个对象是否相等

System.out.println("fru1和fru2的引用比较：" + fru1.equals(fru2));

System.out.println("————————————————————————————————————————");

// 实例化子类对象，并传入相关参数值

Waxberry one = new Waxberry("圆形", "酸甜适中", "紫红色");

// 调用子类face方法和eat方法

one.face();

one.eat();

// 测试重写toString方法，输出子类对象的信息

one.toString();

System.out.println("——————————————————————————————————————————————");

// 实例化Banana类对象，并传入相关参数值

Banana two = 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

two.advantage();

two.advantage("黄色");

}

}