清晨小练习-封装概念及构造函数-优快云博客

本文通过Java语言实现了一个简单的猫咪领养系统，利用类和对象的概念，演示了如何使用私有成员变量与公共访问方法来封装数据，并通过构造函数初始化对象属性。

Bate：猫咪领养

class Cat{
	private int age;		//权限私有化
	private String name;
	private String color;
	private String homeland;
	public void setAge(int a){	//设置访问方法
		age=a;
		System.out.println("Age="+a);
	}
	public void setName(String n){
		name=n;
		System.out.println("Name="+n);
	}
	public void setColor(String c){
		color=c;
		System.out.println("Color="+c);
	}
	public void setHomeland(String h){
		homeland=h;
		System.out.println("Homeland="+h);
	}
}
class getCat{
	public static void main(String[] args){
		Cat c=new Cat();		//创建对象
		c.setAge(1);
		c.setColor("Mixed");
		c.setName("Coke");
		c.setHomeland("Italy");
	}
}

Ver 1.0

应用构造函数与构造代码块

class Cat{
	private int age;		
	private String name;
	private String color;
	private String homeland;
	{	//构造代码块
		System.out.println("_∑:зゝ∠)_");
	}
	Cat(int a,String n,String c,String h){
		age=a;
		name=n;
		color=c;
		homeland=h;
		System.out.println("Name="+n+"  Age="+a+"  Color="+c+"  Homeland="+h);
	}
}
class getCat{
	public static void main(String[] args){
		Cat c=new Cat(-1,"Coke","Mixed","Italy");
	}
}

转载于:https://my.oschina.net/Almon/blog/709466