问仅在Java 1.8.0_45中使用ConcurrentModificationException

EN

import java.util.*;

public class TestClass {

    private static List<String> list;   
    public static void main(String[] argv) {

        list = generateStringList(new Random(), "qwertyuioasdfghjklzxcvbnmPOIUYTREWQLKJHGFDSAMNBVCXZ1232456789", 50, 1000);

//      Collections.sort(list, new Comparator<String>() {
//          public int compare(String f1, String f2) {
//              return -f1.compareTo(f2);
//          }
//      });

        for (int i = 0; i < 500; i++) {
            new MyThread(i).start();
         }

    }

    private static class MyThread extends Thread  {
        int id;
        MyThread(int id) { this.id = id; }
        public void run() {

            Collections.sort(list, new Comparator<String>() {
                public int compare(String f1, String f2) {
                    return -f1.compareTo(f2);
                }
            });

            for (Iterator it = list.iterator(); it.hasNext();) {
                String s = (String) it.next();
                try {
                    Thread.sleep(10 + (int)(Math.random()*100));
                }catch (Exception e) { e.printStackTrace(); }

                System.out.println(id+" -> "+s);
            }           
        }       
    }

    public static List<String> generateStringList(Random rng, String characters, int length, int size)
    {
        List<String> list = new ArrayList<String>();
        for (int j = 0; j < size; j++) {
            char[] text = new char[length];
            for (int i = 0; i < length; i++)
            {
                text[i] = characters.charAt(rng.nextInt(characters.length()));
            }
            list.add(new String(text));
        }
        return list;
    }
}