同一线程范围内数据共享

来源：互联网发布：酷狗网络异常无法访问编辑：程序博客网时间：2024/05/29 16:05

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());//与本线程相关的实例
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;
}
}

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