// 1 使用Iterator提供的remove方法，用于删除当前元素

 for(Iterator<string> it = myList.iterator(); it.hasNext();) {

     String value = it.next();

      if(value.equals("3")) {

          it.remove(); // ok

     }

}

System. out.println( "List Value:"  + myList.toString());

 // 2 建一个集合，记录需要删除的元素，之后统一删除            

List<string> templist = newArrayList<string>();

 for(String value : myList) {

      if(value.equals("3")) {

          templist.remove(value);

     }

}

 // 可以查看removeAll源码，其中使用Iterator进行遍历

myList.removeAll(templist);

System. out.println( "List Value:"  + myList.toString());       

  // 3. 使用线程安全CopyOnWriteArrayList进行删除操作

List<string> myList = newCopyOnWriteArrayList<string>();

myList.add("1");

myList.add("2");

myList.add("3");

myList.add("4");

myList.add("5");

Iterator<string> it = myList.iterator();

 while(it.hasNext()) {

     String value = it.next();

      if(value.equals("3")) {

          myList.remove("4");

          myList.add("6");

          myList.add("7");

     }

}

System. out.println( "List Value:"  + myList.toString());

 // 4. 不使用Iterator进行遍历，需要注意的是自己保证索引正常

 for(inti = 0; i < myList.size(); i++) {

     String value = myList.get(i);

     System. out.println( "List Value:"  + value);

      if(value.equals("3")) {

          myList.remove(value); // ok

          i--;// 因为位置发生改变，所以必须修改i的位置

     }

}

System. out.println( "List Value:"  + myList.toString());

List<string> myList = newCopyOnWriteArrayList<string>();

 myList.add("1");

 myList.add("2");

 myList.add("3");

 myList.add("4");

 myList.add("5");

newThread(newRunnable() {

     @Override

     publicvoidrun() {

          for(String string : myList) {

               System.out.println("遍历集合 value = "  + string);

               try{

                    Thread.sleep(100);

               }catch(InterruptedException e) {

                    e.printStackTrace();

               }

          }

     }

}).start();

newThread(newRunnable() {

     @Override

     publicvoidrun() {

          for(inti = 0; i < myList.size(); i++) {

               String value = myList.get(i);

               System.out.println("删除元素 value = "  + value);

           if(value.equals("3")) {

                myList.remove(value);

                i--;// 注意                          

           }

           try{

                    Thread.sleep(100);

               }catch(InterruptedException e) {

                    e.printStackTrace();

               }

          }

     }

}).start();