java类中的属性用get什么意思？

Question

package com.qst;
import java.util.Date;
public class Transport {
private String id;
private Date time;
private String address;
private int Type;
private String handler;
private String reciver;
private int transportType;
public Transport(){
}
public Transport(String id,Date time,String address,int Type,String handler,String reciver,int transportType){
this.id=id;
this.time=time;
this.address =address;
this.Type =Type;
this .handler=handler;
this.reciver =reciver;
this.transportType =transportType;
}

 public int getType() {
        return Type;
    }
    public void setType(int type) {
        Type = type;
    }

public String toString(){
    return id+","+time+","+address+","+this.getType()+","+handler+","+transportType;
}

}
请问在最后public String toString中直接用+Type和+this.getType()有什么区别吗？

Answer 1

规范，，为了更好的封装

假如一个我需要Type只读，，【直接用+Type】如何实现？
不好实现吧，，使用get，，set可以很好控制权限问题。

类的内部是可以直接访问的，，为了统一，尽可能在任何地方都使用get，set访问

个人见解，，有问题还可以追问