为什么封装出现问题，求各位大神指点
class Telphone
{
private float screen;
private float cpu;
private float mem;
public float getScreen()
{
return screen;
}
public void setScreen(float newScreen)
{
screen=newScreen;
}
public Telphone()
{
System.out.println("无参");
}
public Telphone(float newScreen,float newCpu,float newMem)
{
screen=newScreen;
cpu=newCpu;
mem=newMem;
System.out.println("有参");
}
}
class InitailTelphone
{
public static void main(String[] args)
{
Telphone phone=new Telphone();
Telphone phone2=new Telphone(5.0f,1.4f,2.0f);
phone2.setScreen(6.0f);
System.out.println("screen:"+phone2.getScreen());
}
}
