자바 학습 사고

package com.imooc;
//1.     
public class Telphone {
    //2.  (    )    
    float screen;
    float cpu;
    float mem;
    int var = 30;
    //3.      
//            public   void,   void,  public,        ?
//        
    void call(){
        /*
        int var = 40;
        System.out.println("var:"+var);
        int localVar = 10;//    
        System.out.println("localVar:"+localVar);
        System.out.println("var:"+var);
        */
        System.out.println("Telphone       !");
    }
    void sendMessage(){
        int localVar  = 20;//    
        System.out.println("localVar:"+localVar);
        System.out.println("var:"+var);
        System.out.println("screen:"+screen+" cpu:"+cpu+" mem:"+ mem +" Telphone       !");
    }
    
    public Telphone(){
        System.out.println("       !");
    }
    public Telphone(float newScreen,float newCpu,float newMem){
        screen = newScreen;
        cpu = newCpu;
        mem = newMem;
        System.out.println("          !");
    }
}