package com.shine.demo.object;

import java.io.Serializable;

@SuppressWarnings("serial")

public class Fruit implements Serializable, Comparable<Fruit>{

	/**

	 * id.

	 */

	private Long id;

	/**

	 * 名称.

	 */

	private String name;

	/**

	 * 价格.

	 */

	private Double price;

	public Fruit() {

		super();

	}

	public Fruit(Long id, String name, Double price) {

		super();

		this.id = id;

		this.name = name;

		this.price = price;

	}

	public Long getId() {

		return id;

	}

	public void setId(Long id) {

		this.id = id;

	}

	public String getName() {

		return name;

	}

	public void setName(String name) {

		this.name = name;

	}

	public Double getPrice() {

		return price;

	}

	public void setPrice(Double price) {

		this.price = price;

	}

	@Override

	public String toString() {

		return "id为：" + this.getId() + ",的："+ this.getName() +"的价格为："+this.getPrice();

	}

	@Override

	public int compareTo(Fruit otherFruit) {

		if(!(this.id.equals(otherFruit.id)))

			return this.id.compareTo(otherFruit.id);

		else if(!(this.name.equals(otherFruit.name)))

			return this.name.compareTo(otherFruit.name);

		else if(this.price.equals(otherFruit.price))

			return this.price.compareTo(otherFruit.price);

		return 0;

	}

	@Override

	public int hashCode() {

		final int prime = 31;

		int result = 1;

		result = prime * result + ((id == null) ? 0 : id.hashCode());

		result = prime * result + ((name == null) ? 0 : name.hashCode());

		result = prime * result + ((price == null) ? 0 : price.hashCode());

		return result;

	}

	@Override

	public boolean equals(Object obj) {

		if (this == obj)

			return true;

		if (obj == null)

			return false;

		if (!(obj instanceof Fruit))

			return false;

		Fruit other = (Fruit) obj;

		return this.id.equals(other.id) && this.name.equals(other.name) && this.price.equals(other.price);

	}

}

package com.shine.demo.object;

public class ObjOpen {

	public static void main(String[] args) {

		/**方法一 ： new语句直接创建对象 */

		Fruit fruit = new Fruit(1L,"苹果",4.3);

		System.out.println(fruit.toString());

		/**方法三 ：运用反射手段,调用java.lang.Class或者java.lang.reflect.Constructor类的newInstance()实例方法。

		 *         如:Object obj = Class.forName("java.lang.Object").newInstance();

		 **/

		try {

			Fruit fruit2 = (Fruit) Class.forName("com.shine.demo.object.Fruit").newInstance();

			fruit2.setId(2L);

			fruit2.setName("香蕉");

			fruit2.setPrice(2.6);

			System.out.println(fruit2);

		} catch (InstantiationException e) {

			e.printStackTrace();

		} catch (IllegalAccessException e) {

			e.printStackTrace();

		} catch (ClassNotFoundException e) {

			e.printStackTrace();

		}

	}

}