ThreadLocal簡單使用示例

ThreadLocal為每個線程提供單獨的數據副本，線程間的數據為自身線程所獨有(不存在共享變量問題)，直接看代碼

public class ThreadLocalTest {

     private static ThreadLocal<List<String>> threadLocal = new ThreadLocal<>();
     
    public void setThreadLocal(List<String> value) {

           threadLocal.set(value);
    }

    public void getThreadLocal() {

           threadLocal.get().foreach(name -> System.out.println(Thread.currentThread().getName()+"###" + name ));  
    }


    public static void main(String[] args) {

             final ThreadLocalTest test = new ThreadLocalTest();
             
             new Thread(new Runnable() {
            @Override
            public void run() {
                List<String> strs = new ArrayList<String>();
                strs.add("1");
                strs.add("2");
                strs.add("3");
                t.setThreadLocal(strs);
                t.getThreadLocal();
            }
        },"t1").start();
        
        new Thread(new Runnable() {
            
            @Override
            public void run() {
                List<String> strs = new ArrayList<String>();
                strs.add("a");
                strs.add("b");
                t.setThreadLocal(strs);
                t.getThreadLocal();
            }
        },"t2").start();
    }

}

t1 t2線程各自獲取到自己的線程的所屬的變量