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  • java.util.ConcurrentModificationException

    java.util.ConcurrentModificationException

    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.Iterator;
    import java.util.List;
    
    public class ListOfRemove {
        public static void main(String[] args) {
            List<Integer> list = new ArrayList(Arrays.asList(1, 2, 10, 20, 30));
            Iterator<Integer> it = list.iterator();
            while (it.hasNext()) {
                int x = it.next();
                if (x >= 10) {
                    list.remove(Integer.valueOf(x));
                }
            }
            System.out.println("Modified ArrayList : " + list);
        }
    }
    

    应该使用 Iterator(迭代器) 的 remove() 方法删除

    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.Iterator;
    import java.util.List;
    
    public class ListOfRemove {
        public static void main(String[] args) {
            List<Integer> list = new ArrayList(Arrays.asList(1, 2, 10, 20, 30));
            Iterator<Integer> it = list.iterator();
            while (it.hasNext()) {
                int x = it.next();
                if (x >= 10) {
                    it.remove();
                }
            }
            System.out.println("Modified ArrayList : " + list);
        }
    }
    

    Modified ArrayList : [1, 2]

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  • 原文地址:https://www.cnblogs.com/hgnulb/p/11404207.html
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