java 初级之封装的实现步骤

1、修改属性的可见性-属性前面加上修饰符private/
2、创建getter/setter方法-用于属性的读写
3、在getter/setter方法中加入属性控制语句-对属性值的合法性进行判断
eg:
public class Telphone{
private float screen;
private float cpu;
private float mem;

public float getScreen(){
return screen;
}
public void setScreen(float newScreen){
screen=newScreen;
}
}
...main(...){
...
对象名.setScreen(6.0f);
System.out.println("screen:"+对象名.getscreen());}