package util;  /**  * @说明 变量安全测试  */  public class Test {      public static void main(String[] args) {          Runnable accumelatora = new Accumulatort();          Thread threada = new Thread(accumelatora, "ThreadA");          Thread threadb = new Thread(accumelatora, "ThreadB");          threada.start();          threadb.start();      }  }  class Accumulatort implements Runnable {      // 实例变量      int locals = 0;      public void run() {          for (int i = 0; i <= 10; i++) {              locals += 1;              try {                  Thread.sleep(1000);              } catch (Exception e) {              }              System.out.println(Thread.currentThread().getName() + "-->"                      + locals);          }      }  }