随堂笔记

package edu.xcdq;

/**

• @author yuhuicun
• @date 2021/4/20 14:48
  */
  public class Phone {
  public double width;
  public double height;
  public int weiht;
  public String color;

/*
构造方法    1. 一定没有返回值 2. 方法名字必须和类名完全一致
 */
// 无参构造方法，不管写不写，系统都会生成
public Phone(){
    System.out.println("被调用，有一个对象产生");
}
public Phone(double kuandu , double gaodu , int zhongliang , String yanse){
    width = kuandu;
    height = gaodu ;
    weiht = zhongliang;
    color = yanse;
}
public Phone (double kuandu , double gao , int zhongliang){
    width = kuandu;
    height = gao;
    weiht = zhongliang;
}

public Phone(int kuandu , int gao , int zhongliang){
    width = kuandu ;
    height = gao ;
    weiht = zhongliang ;
}

public void startUp(){
    System.out.println("正在开机");
}
public void suopin(){
    System.out.println("手机即将锁屏");
}


//方法的反复

public String toString(){
    return"{"+ this.weiht+""+this.height+""+this.weiht+""+this.color;

}