线程范围内变量

package cn.itcast.heima2;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
public class ThreadScopeShareData {
 
 private static Map<Thread, Integer> threadData = new HashMap<Thread, Integer>();
 public static void main(String[] args) {
      for(int i=0;i<2;i++){
           new Thread(new Runnable(){
           @Override 
            public void run() {
                 int data = new Random().nextInt();
                 System.out.println(Thread.currentThread().getName() + " has put data :" + data); 
                 threadData.put(Thread.currentThread(), data);
                 new A().get();
                 new B().get();
            }
       }).start();
   } 
 }    
 
 static class A{
      public void get(){
           int data = threadData.get(Thread.currentThread());
           System.out.println("A from " + Thread.currentThread().getName() + " get data :" + data);
      }
 }
 
 static class B{
      public void get(){
      int data = threadData.get(Thread.currentThread());
      System.out.println("B from " + Thread.currentThread().getName()+ " get data :" + data);
    }
 }
}

import java.util.HashMap;
import java.util.Map;
import java.util.Random;


public class ThreadLocalTest {

 
     public static void main(String[] args) {
          new ThreadLocalTest().init();
     }
   //init
     private void init(){
          for(int i =0;i<2;i++){
               new Thread(new Runnable() {
   
                    public void run() {
     
                         int data = new Random().nextInt();
                         Person.getThreadInstance().setName(Thread.currentThread().getName()); 
                         Person.getThreadInstance().setAge(data);
                         new A().get(); 
                         new B().get();
                } 
           }).start();
        }
    } 
 //A 
 class A {
      Person person = Person.getThreadInstance();
      public void get(){
           System.out.println("A：-"+Thread.currentThread().getName()+":name:"+person.getName()+":age:"+person.getAge());
         }
 }
 //B
 class B {
      Person person = Person.getThreadInstance();
      public void get(){
           System.out.println("B：-"+Thread.currentThread().getName()+":name:"+person.getName()+":age:"+person.getAge());
      }
}
 //Person   将跟线程相关的绑定，放在共享的数据类的内部实现
  static class Person{
          private static ThreadLocal<Person>  threadLocal = new ThreadLocal<ThreadLocalTest.Person>(); 
 
          private Person(){
   
          }
 
         public static Person  getThreadInstance(){
               Person person = threadLocal.get();
               if(person==null){
                    person = new Person();
                    threadLocal.set(person);
               }
               return person;.
         }
   
          private String name;
          private int age;
    
          public String getName() {
               return name;
          }
          public void setName(String name) {
                this.name = name;
          }
          public int getAge() {
               return age; 
          }
          public void setAge(int age) {
               this.age = age;
          }
 
    } 
   
 }

import java.util.HashMap;
import java.util.Map;
import java.util.Random;


public class ThreadLocalTest {


     public static final ThreadLocal<Person>  threadlocal = new  ThreadLocal(){

              @Override
              protected Object initialValue() {
   
                   return new Person();
              }
       
    };
 
     public static void main(String[] args) {
          new ThreadLocalTest().init();
     }
  
     private void init(){
          for(int i =0;i<2;i++){
               new Thread(new Runnable() {
   
                    public void run() {
     
                         int data = new Random().nextInt();
                         threadlocal.get().setName(Thread.currentThread().getName());
                         threadlocal.get().setAge(data);
                         new A().get();
                         new B().get();
                }
           }).start();
        }
    }
     //A
     class A {
          Person person = threadlocal.get();
          public void get(){
               System.out.println("A：-"+Thread.currentThread().getName()+":name:"+person.getName()+":age:"+person.getAge());
             }
     }
   //B
    class B {
       Person person = threadlocal.get();
       public void get(){
           System.out.println("B：-"+Thread.currentThread().getName()+":name:"+person.getName()+":age:"+person.getAge());
        }
    }
      //Person  
     static class Person{
       
          public Person(){ 
   
          }
 
          private String name; 
          private int age;
 
          public String getName() {
               return name;
          }
          public void setName(String name) {
                this.name = name;
          }
          public int getAge() {
               return age;
          }
          public void setAge(int age) {
               this.age = age;
          }
 
    }
 
}