老师为什么我的谷歌浏览器页面没有反应？

代码文件加密了，不能解压，密码是多少，为什么要设置这么多密码

对类.方法.属性进行注释时一般是放在变量上面么? 那种写法好一些?

比如:

    //定义**的ID                                

    int ID = 15;                            int ID = 15; //定义**的ID

对类或者方法注释时/**  , /* , //用哪个是都可以吗?一般用哪个比较规范呢.

/*视频开始*/
.video-box{
    width: 100%;
    height: 299px;
    background-color: red;
}
.video-box>div{
    width: 296px;
    height: 285px;
    background-color: #ffffff;
    float: left;
    margin-bottom: 14px;
    margin-right: 14px;
}
.video-box>div:last-child{
    margin-right: 0;
}

<!--主题开始-->
<div class="content">
       <div class="wrap">
<!--手机开始-->
      <div class="phone">
          <h3 class="title">手机</h3>
          <div class="phone-box">
              <div class="phone-box-left">
                  <a href="#">
                      <img src="images/574c6643ab91c6618bfb2d0e2c761d0b.jpg" alt="">
                  </a>
              </div>
              <div class="phone-box-right">
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
                  <div class="items1">
                      <a href="#">
                          <img src="images/d880ff45a9a3b70527770e01521fc939.jpg"
                               alt="" class="img1">

                          <p class="name2">小米10至尊版</p>
                          <p class="desc2">120X 变焦/120W秒充/120Hz屏幕</p>
                          <p class="price2">5299元起</p>
                      </a>
                  </div>
              </div>
          </div>
          <div class="big-img">
              <a href="#">
                  <img src="images/c3b86ede4dd31d7c126d56fbdde4f855.jpg" alt="">
              </a>
          </div>
      </div>
<!-- 手机结束-->
<!--  家电开始-->
       <div class="elc">
           <h3 class="title">家电</h3>
           <div class="elc-box">
               <div class="items1 items2">
                   <a href="#">
                       <img src="images/f256b81e4233333692eece77ed06ebc2.jpg" alt="">
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                       class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                       class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                       class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                       class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1 items2">
                   <a href="#">
                       <img src="images/f256b81e4233333692eece77ed06ebc2.jpg" alt="">
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                            class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                            class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items1">
                   <a href="#">
                       <img src="images/ef4c68fed730ec26bf2fa0ff620975c5.jpg" alt=""
                            class="img1">
                       <p class="name2">小米11 Ultra</p>
                       <p class="desc2">1/1.12''GN2｜2K四微曲屏</p>
                       <p class="price2">5499元 <del>5999元</del></p>
                   </a>
               </div>
               <div class="items-last">
                   <div></div>
                   <div></div>
               </div>
           </div>
       </div>
       </div>
        <div class="big-img">
               <a href="#">
                   <img src="images/c3b86ede4dd31d7c126d56fbdde4f855.jpg" alt="">
               </a>
           </div>
    <!--    家电结束-->
    <!--视频开始-->
    <div class="video">
        <h3 class="title">视频</h3>
        <div class="video-box">
            <div></div>
            <div></div>
            <div></div>
            <div></div>
        </div>
    </div>
<!--  视频结束-->
       </div>
</div>
<!-- 主题结束-->

视频顶头le？

当我使用git reset head^之后，好像仓库里原来的head版本被删除了。这样子正常吗

老师，Edge网页是自动设置了utf-8编码吗，我没有进行utf-8的注释，下面这两个地方都没有出现乱码的情况。

问题点:在执行测试Human类时并没有输出

"你输入的数据有误"

而且h对象的年龄没被修改，而h2对象的年龄被修改了？

代码一：定义Human类

package com.sxt.encapsulation2;

public class Human {
	private int id;
	private String name;
	private int age;
	private Boolean flag;
	public Human(int id,String name, int age,Boolean flag){
		this.name = name;
		this.id = id;
		this.age =age;
		
		
	}
	public Human(){
		
	}
	public void setName(String name){
		this.name = name;
	}
	public String getName(){
		return name;
	}
	public void setId(int id){
		this.id = id;
	}
	public int getId(){
		return id;
	}
	public void setAge(int age){
		if(age>0 && age<130){
			this.age=age;
		}else{
		System.out.println("你输入的数据有误");
		}
	}
	public int getAge(){
		return age;
	}
	public void isFlag(){
		this.flag = flag;
	}
	public boolean getFlag(){
		return flag;
	}
	public String toString(){
		return "Human [ name=" + name+ ",age=" + age + "]";
	}

}

代码二：测试Human类

package com.sxt.encapsulation2;

public class TestHuman {
	public static void main(String[]args){
		Human h = new Human();
		//h.age=34;//编译错误
		//h.name="小红"
		h.setAge(250);
		h.setName("张三");
		h.setId(007);
		System.out.println(h);
		Human h1 = new Human(007,"小白",300,false);
		System.out.println(h1);
	}

}

执行结果：

配置通知时提供一个方法名就够了吗？不用提供包名吗？能找到这个方法的依据是什么啊？如果有重名的方法呢？

请问老师，这节课中main方法中调用静态方法，是用类名.静态方法名()调用。即User2.printCompany();

public class User2 {
		int id; // id
	    String name; // 账户名
	    static String company = "北京尚学堂"; // 公司名称
	    public User2(int id, String name) {
	        this.id = id;
	        this.name = name;
	    }
	    public static void printCompany() {
	        System.out.println(company);
	    }
	    public static void main(String[] args) {
	        User2 u = new User2(101, "高小七");
	        User2.printCompany();
	        User2.company = "北京阿里爷爷";
	        User2.printCompany();
	        //printCompany();//也可以直接调用静态方法
	    }
}

我发现也用printCompany()直接调用。请问这样是程序背后默认在printCompany()前面加上了类名吗？

请问一下，在线程池执行大量Callable任务时，采用10个线程的线程池，为什么加了List集合之后效率就提高了呢？

老师这里明明是两个文件里的两份代码，为什莫salary就是一个自己写的模块了吗？？？？？？？？？？？？？？？

为什莫就可以在test里调用salary文件里的方法了呢？？？？？？？？？？？？？？？？？？？、？？

你讲的是key的存储，value存在哪呢？

老师，请问这几个.xml是什么关系呢，web.xml中需要配置什么呢

老师，我看资料说，linkedlist 擅长做保存和删除操作，不擅长查找操作。但是，该类中有get（int index）；这个根据索引找元素的方法，那是不是就弥补了不擅长查找操作这个问题？

老师 这个箭头指的单词为啥会标红？自己打出来就有问题，按系统提示的联想词就没有问题。