每個(gè)線程提供不同的變量拷貝 PRivate static ThreadLocal<Integer> x = new ThreadLocal<Integer>();

     例子：

//每個(gè)線程提供不同的變量拷貝public class TraditionalThreadLoal {      static Integer  itCommon = new Integer(0);//每個(gè)線程會擁有獨(dú)自it變量public static void main(String[] args) {final ThreadLocal<Integer>  it = new ThreadLocal<>();//每個(gè)線程會擁有獨(dú)自it變量     new Thread(new Runnable() {@Overridepublic void run() {for(int i=0;i<10;i++){it.set(i);itCommon = i;System.out.println("1->"+it.get());System.out.println("itCommon->"+itCommon);try {Thread.sleep(1000);} catch (InterruptedException e) {e.printStackTrace();}}}  }).start();       new Thread(new Runnable() {@Overridepublic void run() {for(int i=0;i<10;i++){it.set(i);itCommon = i;System.out.println("2->"+it.get());System.out.println("itCommon->"+itCommon);try {Thread.sleep(3000);} catch (InterruptedException e) {e.printStackTrace();}}}}).start();}}