Big Data Java Foundation Eighth day job

First question:class car extends thread{    private string name;     private locked lock;    public car (String name,Locked  lock) {        this.name = name;         this.lock = lock;    }     Public void run () {        synchronized (lock) {   &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN ("Car number:"  + name +   ", start into the tunnel ...");             for (int i=1;i <=10;i++) {                 try{                     system.out.println ("Enter tunnel section"  + i +  "SEC");                     thread.sleep (1000*1);                     }catch (Exception  e) {};            }     &NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;&NBSP;SYSTEM.OUT.PRINTLN ("Car number:" + name +  ", End into tunnel ...");         }    }}class Locked{     //empty Lock ...} Class cardemo{    public static void main (String[] args) {         locked lock = new locked ();         car car001 = new car ("car001", lock);       &Nbsp; car car002 = new car ("car002", lock);         car car003 = new car ("car003", lock);         Car car004 = new car ("car004", lock);         car  car005 = new car ("car005", lock);             car001.start ();         car002.start ();         car003.start ();         Car004.start ();         car005.start ();     }} The second question:import java.util.arraylist;import java.util.list;class bee extends thread{     private String name;    private List<Integer>  list;    private&Nbsp;int i = 1;    public bee (string name,list<integer>  list) {        this.name = name;         this.list = list;    }     Public void run () {        while (true) {             synchronized (list) {                                  if (List.size ()  >= 10) {                     try{                          list.wait();                     }catch (exception e) {};                 }else{                     try{                         thread.sleep ( ;                 )    }catch (exception e) {};                     system.out.println ("Bee Number:"  + name +   ", Production section"  + i +  "Times honey! ");                 &nBsp;   list.add (New integer (i));                     i ++;                     list.notify ();                                      }             }         }            }}class bear extends  thread{    private string name;    private list <Integer> list;    private int total = 1;     private locked lock;    public bear (string name,list<integer> list) {         this.name = name;         this.list = list;    }    public void  Run () {        while (true) {             synchronized (list) {                 if (List.size ()  >= 10) {                     system.out.println ("Bear consumption:"  + total +  "Times! ");                     total ++;            &nbSp;       list.removeall (list);                     try{                          thread.sleep (;             )        }catch (exception e) {};                     list.notify ();                 }else{                     try{                         &nBsp;list.wait ();                     }catch (exception e) {                         e.printstacktrace ();                      }                }             }         }    }}class ProductDemo{    public static  Void main (String[] args) {        list<integer>  List = new arraylist<integer> ();        bee  Bee001 = nEw bee ("001", list);        bee bee002 = new  Bee ("002", list);         bee bee003 = new bee ("003" , list);         bee001.start ();         bee002.start ();         bee003.start ();         bear bear = new bear ("001", list);         bear.start ();     }}

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Big Data Java Foundation Eighth day job