同一線程範圍内資料共享

package com.ygl;



 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>();

static class A{

public void getData(){

int data=threadData.get(Thread.currentThread());

System.out.println("A"+Thread.currentThread().getName()+"data:"+data);

}

}


static class B{

public void getData(){

int data=threadData.get(Thread.currentThread());

System.out.println("B"+Thread.currentThread().getName()+"data:"+data);

}


}


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()+"data:"+data);

threadData.put(Thread.currentThread(), data);

      new A().getData();

      new B().getData();

 
}
 
}).start();

}


}
}
//******************************
package com.ygl;


 import java.util.Random;


 public class ThreadScopeShareData {


   private static ThreadLocal<Integer>  threadData=new ThreadLocal<Integer>();
static class A{
public void getData(){
int data=threadData.get();
System.out.println("A"+Thread.currentThread().getName()+"data:"+data);
}
}

static class B{
public void getData(){
int data=threadData.get();
System.out.println("B"+Thread.currentThread().getName()+"data:"+data);
}

}

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()+"data:"+data);
threadData.set(data);
      new A().getData();
      new B().getData();

}

}).start();
}


 }
 }//*********************************************************
package com.ygl;


 import java.util.Random;


 public class ThreadScopeShareData {


   private static ThreadLocal<Integer>  threadData=new ThreadLocal<Integer>();
   private static ThreadLocal<MyThreadScopeData> myThreadScopeData=new ThreadLocal<MyThreadScopeData>();
static class A{
public void getData(){
int data=threadData.get();
System.out.println("A"+Thread.currentThread().getName()+"data:"+data);
MyThreadScopeData  mydata=MyThreadScopeData.getThreadInstance();
System.out.println(mydata.getAge()+"===="+mydata.getName());
}
}

static class B{
public void getData(){
int data=threadData.get();
System.out.println("B"+Thread.currentThread().getName()+"data:"+data);
MyThreadScopeData  mydata=MyThreadScopeData.getThreadInstance();
System.out.println(mydata.getAge()+"===="+mydata.getName());
}

}

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()+"data:"+data);
threadData.set(data);
MyThreadScopeData.getThreadInstance().setName(Thread.currentThread().getName());//與本線程相關的執行個體
MyThreadScopeData.getThreadInstance().setAge(data);
      new A().getData();
      new B().getData();

}

}).start();
}


 }


 }
 class MyThreadScopeData{
private static ThreadLocal<MyThreadScopeData>  map=new ThreadLocal<MyThreadScopeData>();

private MyThreadScopeData(){}
public static  MyThreadScopeData  getThreadInstance(){
MyThreadScopeData  instance=map.get();
if(instance ==null){
instance=new MyThreadScopeData();
map.set(instance);
}
return instance;
}


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;
}
 }