Beginners: What is JavaBean

JavaBeans是Java中一种特殊的类，可以将多个对象封装到一个对象（bean）中。特点是可序列化，提供无参构造器，提供getter方法和setter方法访问对象的属性。名称中的“Bean”是用于Java的可重用软件组件的惯用叫法。
—以上源自维基百科

At first, we package an object when it comes to car object as an example:

public class car {
	/**
	 * 这是一个五座小汽车
	 */
	
	private int 车轮 = 4 ;
	private int 方向盘 = 1;
	private int 座位 = 5;
	
	
	public int get车轮() {
		return 车轮;
	}
	public void set车轮(int 车轮) {
		this.车轮 = 车轮;
	}
	public int get方向盘() {
		return 方向盘;
	}
	public void set方向盘(int 方向盘) {
		this.方向盘 = 方向盘;
	}
	public int get座位() {
		return 座位;
	}
	public void set座位(int 座位) {
		this.座位 = 座位;
	}
	
}

In the beginning java learning, we put the above code is called an object class.

And a later stage, which we call a javaBean.

For ease of operation since the late java data, usually using an object as a container, the data needs to be assigned to the operation of the object, and in order to facilitate the assignment, then we must have this get / set methods.

Summarized as follows:

• All property is private

• Provide a default constructor

• Provide getter and setter

• Implement serializable Interface

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Author: Sam Rainsy

from：https://blog.csdn.net/zhouvip666/article/details/83867401