北京数码视讯联通机顶盒算啥牌子

Posted 2023-05-04

参考技术A q7联通。根据联通及电子科技公司显示北京数码视讯联通机顶盒算什么牌子数码视讯联通机顶盒的品牌跟参数。

数码视讯宣讲会现场笔试题

数码视讯宣讲会现场笔试题：

1、list长度为100，用两个线程交换取出5个数

  1 package ren.laughing.test.shumashixun;
  2 
  3 import java.util.ArrayList;
  4 import java.util.List;
  5 
  6 /**
  7  * 两个线程，交换取出5个元素，直到list为空
  8  * 
  9  * @author Laughing_Lz
 10  * @time 2016年9月29日
 11  */
 12 class SynList {
 13     public List list = new ArrayList();
 14 
 15     public synchronized void get5Counts1() {
 16         if (list.size() == 0) {
 17             System.out.println("list已为空，无法取出！");
 18         } else {
 19             System.out.println("执行线程1");
 20             for (int i = 0; i < 5; i++) {
 21                 System.out.println(list.get(0));
 22                 list.remove(0);
 23             }
 24             System.out.println("已取出5个");
 25             try {
 26                 wait();// wait写在前面
 27                 if (list.size() == 0) {
 28                     System.out.println("list已为空，无法取出！");
 29                 }
 30             } catch (InterruptedException e) {
 31                 // TODO Auto-generated catch block
 32                 e.printStackTrace();
 33             }
 34             notify();
 35         }
 36     }
 37 
 38     public synchronized void get5Counts2() {
 39         if (list.size() == 0) {
 40             System.out.println("list已为空，无法取出！");
 41         } else {
 42             System.out.println("执行线程2");
 43             for (int i = 0; i < 5; i++) {
 44                 System.out.println(list.get(0));
 45                 list.remove(0);
 46             }
 47             System.out.println("已取出5个");
 48             notify();// notify写在前面
 49             try {
 50                 wait();
 51                 if (list.size() == 0) {
 52                     System.out.println("list已为空，无法取出！");
 53                 }
 54             } catch (InterruptedException e) {
 55                 // TODO Auto-generated catch block
 56                 e.printStackTrace();
 57             }
 58         }
 59     }
 60 
 61     public void set100Counts() {
 62         for (int i = 0; i < 100; i++) {
 63             list.add(i);
 64         }
 65     }
 66 }
 67 
 68 class SynQueue1 implements Runnable {
 69     private SynList synList;
 70 
 71     public SynQueue1(SynList synList) {
 72         super();
 73         this.synList = synList;
 74     }
 75 
 76     @Override
 77     public void run() {
 78         while (synList.list.size() >= 5) {
 79             synList.get5Counts1();
 80         }
 81     }
 82 }
 83 
 84 class SynQueue2 implements Runnable {
 85     private SynList synList;
 86 
 87     public SynQueue2(SynList synList) {
 88         super();
 89         this.synList = synList;
 90     }
 91 
 92     @Override
 93     public void run() {
 94         while (synList.list.size() >= 5) {
 95             synList.get5Counts2();
 96         }
 97     }
 98 }
 99 
100 public class SynQueue {
101     public static void main(String[] args) {
102         SynList synList = new SynList();
103         synList.set100Counts();
104         new Thread(new SynQueue1(synList)).start();
105         new Thread(new SynQueue2(synList)).start();
106         ;
107     }
108 }

2、给定日期，获得当月最后一天和上两个月的第一天

 1 package ren.laughing.test.shumashixun;
 2 
 3 import java.text.ParseException;
 4 import java.text.SimpleDateFormat;
 5 import java.util.Calendar;
 6 import java.util.Date;
 7 
 8 /**
 9  * 关于获取某月份的第一天和最后一天
10  * 
11  * @author Laughing_Lz
12  * @time 2016年9月29日
13  */
14 public class AboutDate {
15     /**
16      * 以传入日期起，获取i个月后的第一天
17      * 
18      * @param strDate
19      * @param i
20      * @return
21      * @throws ParseException
22      */
23     public String getFirstDayOfMonth(String strDate, int i) throws ParseException {
24         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
25         Date date = sdf.parse(strDate);
26         Calendar cal = Calendar.getInstance();
27         cal.setTime(date);
28         cal.add(Calendar.MONTH, i);// 添加i个月份
29         cal.set(Calendar.DAY_OF_MONTH, 1);// 设置cal为当前日期的第一天
30         String firstDayOfMonth = sdf.format(cal.getTime());
31         return firstDayOfMonth;
32     }
33 
34     /**
35      * 以传入日期起，获取i个月后的最后一天
36      * 
37      * @param strDate
38      * @param i
39      * @return
40      * @throws ParseException
41      */
42     public String getLastDayOfMonth(String strDate, int i) throws ParseException {
43         SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
44         Date date = sdf.parse(strDate);
45         Calendar cal = Calendar.getInstance();
46         cal.setTime(date);
47         cal.add(Calendar.MONTH, i + 1);// cal月份加1
48         cal.set(Calendar.DAY_OF_MONTH, 1);// 设置cal为当前月份的第一天
49         cal.add(Calendar.DATE, -1);// cal日期加(-1)天
50         String lastDayOfMonth = sdf.format(cal.getTime());
51         return lastDayOfMonth;
52     }
53 
54     public static void main(String[] args) throws ParseException {
55         String strDate = "2016-09-28";
56         String result1 = new AboutDate().getFirstDayOfMonth(strDate, 0);
57         System.out.println(result1);
58         String result2 = new AboutDate().getLastDayOfMonth(strDate, -2);
59         System.out.println(result2);
60     }
61 }

3、统计某文件夹下包含的jsp,xml,java文件总行数

 1 package ren.laughing.test.shumashixun;
 2 
 3 import java.io.BufferedReader;
 4 import java.io.File;
 5 import java.io.FileNotFoundException;
 6 import java.io.FileReader;
 7 import java.io.IOException;
 8 import java.util.ArrayList;
 9 import java.util.List;
10 
11 /**
12  * 统计某文件夹下包含的jsp,xml,java文件总行数
13  * 
14  * @author Laughing_Lz
15  * @time 2016年9月29日
16  */
17 public class AboutFile {
18     public static int count4Java = 0;
19     public static int count4Xml = 0;
20     public static int count4Jsp = 0;
21 
22     /**
23      * 遍历获得某文件夹下所有文件
24      * 
25      * @param str
26      * @param fileList
27      * @return
28      */
29     public List<String> GetFiles(String str, List<String> fileList) {
30         File file = new File(str);
31         File[] files = file.listFiles();// 列出所有子文件和路径
32         // String[] files = file.list();//列出所有子文件和路径名
33         for (int i = 0; i < files.length; i++) {
34             if (files[i].isDirectory()) {// 是目录，递归
35                 // str = str + "\\" + files[i].getName();//拼接子文件夹路径
36                 fileList = GetFiles(files[i].getAbsolutePath(), fileList);// 传入子文件夹绝对路径名，继续遍历
37             } else {
38                 fileList.add(files[i].getAbsolutePath());// 是文件，将绝对路径名放入list
39             }
40         }
41         return fileList;
42     }
43 
44     /**
45      * 统计各类文件的总行数
46      * 
47      * @param fileList
48      */
49     public void getCounts(List<String> fileList) {
50         for (String file : fileList) {
51             try {
52                 BufferedReader br = new BufferedReader(new FileReader(new File(file)));
53                 String oneLine = br.readLine();
54                 while (oneLine != null) {
55                     if (file.endsWith(".java")) {
56                         count4Java++;
57                     } else if (file.endsWith(".xml")) {
58                         count4Xml++;
59                     } else if (file.endsWith(".jsp")) {
60                         count4Jsp++;
61                     }
62                     oneLine = br.readLine();
63                 }
64             } catch (FileNotFoundException e) {
65                 e.printStackTrace();
66             } catch (IOException e) {
67                 e.printStackTrace();
68             }
69 
70         }
71         System.out.println("java文件总行数：" + count4Java + "\n" + "jsp文件总行数：" + count4Jsp + "\n" + "xml文件总行数：" + count4Xml);
72     }
73 
74     public static void main(String[] args) {
75         List<String> fileList = new ArrayList<String>();
76         String str = "G:\\test";
77         AboutFile af = new AboutFile();
78         af.GetFiles(str, fileList);
79         af.getCounts(fileList);
80     }
81 }