{"id":4900,"date":"2024-12-30T16:25:40","date_gmt":"2024-12-30T08:25:40","guid":{"rendered":"https:\/\/qaqaq.top\/?p=4900"},"modified":"2024-12-30T16:25:45","modified_gmt":"2024-12-30T08:25:45","slug":"%e5%b7%a5%e4%bd%9c%e6%97%b6%e9%81%87%e5%88%b0%e7%9a%84%e4%b8%80%e4%ba%9b%e5%b0%8f%e9%97%ae%e9%a2%982024-java","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=4900","title":{"rendered":"\u5de5\u4f5c\u65f6\u9047\u5230\u7684\u4e00\u4e9b\u5c0f\u95ee\u9898 2024-Java"},"content":{"rendered":"\n

Java\uff1a\u65f6\u95f4\u5b57\u7b26\u4e32\u8f6c\u6362\u65f6\u95f4\u95ee\u9898<\/h2>\n\n\n\n

\u4ee3\u7801<\/h4>\n\n\n\n
     public static void main(String[] args) {
\u200b
        test test = new test();
\u200b
        test.bugFour();
\u200b
    }
\u200b
    private void bugFour() {
        String iso8601String = \"2024-08-08T00:00:00Z\";
\u200b
        SimpleDateFormat formatter = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
        Date date = null;
        try {
            date = formatter.parse(iso8601String);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
\u200b
        System.out.println(date);
    }<\/pre>\n\n\n\n
\u7ed3\u679c<\/h4>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u539f\u56e0<\/h4>\n\n\n\n
\u9519\u8bef\u662f\u56e0\u4e3a\u5c1d\u8bd5\u89e3\u6790\u7684\u65e5\u671f\u5b57\u7b26\u4e32\u4e0e\u6307\u5b9a\u7684\u65e5\u671f\u683c\u5f0f\u4e0d\u5339\u914d\u3002\u9519\u8bef\u4fe1\u606f\u663e\u793a\u8bd5\u56fe\u89e3\u6790\u7684\u65e5\u671f\u5b57\u7b26\u4e32\u662f”2024-08-08T00:00:00Z”\uff0c\u8fd9\u662f\u4e00\u4e2aISO 8601\u683c\u5f0f\u7684\u65e5\u671f\u65f6\u95f4\u5b57\u7b26\u4e32\uff0c\u5b83\u5305\u542b\u4e86\u65e5\u671f\u548c\u65f6\u95f4\uff0c\u5e76\u4e14\u4ee5\u2019Z\u2019\u7ed3\u5c3e\uff0c\u8868\u793a\u8fd9\u662fUTC\u65f6\u95f4\u3002<\/p>\n\n\n\n
\u89e3\u51b3<\/h4>\n\n\n\n
\u4f7f\u7528 ISO 8601\u683c\u5f0f\u89e3\u6790\u5668\u89e3\u6790\u8be5\u5b57\u7b26\u4e32<\/p>\n\n\n\n
     public static void main(String[] args) {
\u200b
        test test = new test();
\u200b
        test.bugFive();
        test.bugFour();
\u200b
    }
\u200b
    \/**
     * Java 7 \u65f6\u95f4\u5b57\u7b26\u4e32\u8f6c\u6362\u65f6\u95f4
     *\/
    private void bugFive() {
\u200b
        String iso8601String = \"2024-08-08T00:00:00Z\";
\u200b
        \/\/ \u521b\u5efaISO 8601\u7684\u65e5\u671f\u65f6\u95f4\u683c\u5f0f\u89e3\u6790\u5668
        SimpleDateFormat isoFormatter = new SimpleDateFormat(\"yyyy-MM-dd'T'HH:mm:ss'Z'\");
        \/\/ \u8bbe\u7f6e\u65f6\u533a\u4e3aUTC\uff0c\u56e0\u4e3aISO 8601\u5b57\u7b26\u4e32\u9ed8\u8ba4\u662fUTC\u65f6\u95f4
        isoFormatter.setTimeZone(TimeZone.getTimeZone(\"UTC\"));
\u200b
        \/\/ \u521b\u5efa\u76ee\u6807\u683c\u5f0f\u7684\u65e5\u671f\u65f6\u95f4\u683c\u5f0f\u89e3\u6790\u5668
        SimpleDateFormat outputFormatter = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
\u200b
        Date date = null;
        try {
            date = isoFormatter.parse(iso8601String);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
\u200b
        \/\/ \u683c\u5f0f\u5316\u4e3a\u76ee\u6807\u683c\u5f0f
        String formattedDateTime = outputFormatter.format(date); \/\/\u5982\u679c\u8f93\u51fa\u4e3a Date \u683c\u5f0f\uff0c\u5219\u4e0d\u9700\u8981\u8fd9\u4e00\u6b65
\u200b
        System.out.println(date);
        System.out.println(formattedDateTime);
\u200b
    }
\u200b
    \/**
     * Java 8 \u65f6\u95f4\u5b57\u7b26\u4e32\u8f6c\u6362\u65f6\u95f4
     *\/
    private void bugFour() {
\u200b
        String iso8601String = \"2024-08-08T00:00:00Z\";
\u200b
        \/\/ \u521b\u5efa\u4e00\u4e2aDateTimeFormatter\u5bf9\u8c61\uff0c\u7528\u4e8e\u89e3\u6790ISO 8601\u683c\u5f0f\u7684\u5b57\u7b26\u4e32
        DateTimeFormatter isoFormatter = DateTimeFormatter.ISO_DATE_TIME;
        \/\/ \u521b\u5efa\u4e00\u4e2aDateTimeFormatter\u5bf9\u8c61\uff0c\u7528\u4e8e\u683c\u5f0f\u5316\u65e5\u671f\u65f6\u95f4\u4e3a\"yyyy-MM-dd HH:mm:ss\"\u683c\u5f0f
        DateTimeFormatter outputFormatter = DateTimeFormatter.ofPattern(\"yyyy-MM-dd HH:mm:ss\");
\u200b
        \/\/ \u4f7f\u7528isoFormatter\u5c06\u5b57\u7b26\u4e32\u89e3\u6790\u4e3aZonedDateTime\u5bf9\u8c61
        ZonedDateTime zonedDateTime = ZonedDateTime.parse(iso8601String, isoFormatter);
        \/\/ \u5c06ZonedDateTime\u8f6c\u6362\u4e3aLocalDateTime
        LocalDateTime localDateTime = zonedDateTime.toLocalDateTime();
        \/\/ \u4f7f\u7528outputFormatter\u5c06LocalDateTime\u683c\u5f0f\u5316\u4e3a\u5b57\u7b26\u4e32
        String formattedDateTime = localDateTime.format(outputFormatter);
\u200b
        SimpleDateFormat formatter = new SimpleDateFormat(\"yyyy-MM-dd HH:mm:ss\");
        Date date = null;
        try {
            date = formatter.parse(formattedDateTime);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
\u200b
        System.out.println(date);
        System.out.println(formattedDateTime);
\u200b
    }<\/pre>\n\n\n\n
\u6ce8\u610f<\/h4>\n\n\n\n
\u6682\u65e0<\/p>\n\n\n\n
Java\uff1a\u4e0d\u80fd\u5728for\u548c\u589e\u5f3afor\u5faa\u73af\u4e2d\u8fdb\u884c\u5143\u7d20\u5220\u9664\uff0c\u4e0d\u7136\u4f1a\u5f15\u53d1\u6570\u636e\u9519\u4e71<\/h2>\n\n\n\n
\u4ee3\u7801<\/h4>\n\n\n\n
    public static void main(String[] args) {
\u200b
        test test = new test();
\u200b
        test.bugThree();
\u200b
    }
\u200b
    private void bugThree() {
\u200b
        List<Map<String, Object>> list = new ArrayList<>();
        HashMap<String, Object> map = new HashMap<>();
\u200b
        map.put(\"1\", \"1\");
        map.put(\"2\", \"2\");
        map.put(\"3\", \"3\");
        map.put(\"4\", \"4\");
        list.add(map);
\u200b
        System.out.println(list);
\u200b
        for (Map<String, Object> demo : list) {
            list.remove(demo);
        }
\u200b
    }<\/pre>\n\n\n\n
\u7ed3\u679c<\/h4>\n\n\n\n
\"\"<\/div><\/figure>\n\n\n\n
\u539f\u56e0<\/h4>\n\n\n\n
\u5728 Java \u4e2d\uff0c\u5982\u679c\u60f3\u5728\u5faa\u73af\u4e2d\u5220\u9664\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff0c\u9700\u8981\u7279\u522b\u5c0f\u5fc3\uff0c\u56e0\u4e3a\u76f4\u63a5\u5728\u5faa\u73af\u4e2d\u4f7f\u7528 remove()<\/code> \u65b9\u6cd5\u53ef\u80fd\u4f1a\u5bfc\u81f4 ConcurrentModificationException<\/code> \u5f02\u5e38\u3002\u8fd9\u662f\u56e0\u4e3a\u5217\u8868\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u88ab\u4fee\u6539\u4e86\u3002<\/p>\n\n\n\n
\u89e3\u51b3<\/h4>\n\n\n\n
\u6709\u4e24\u79cd\u63a8\u8350\u7684\u65b9\u6cd5\u6765\u5b89\u5168\u5730\u5220\u9664\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff1a<\/p>\n\n\n\n
\u65b9\u6cd5 1: \u4f7f\u7528\u8fed\u4ee3\u5668 (Iterator<\/code>)<\/p>\n\n\n\n
\u4f7f\u7528\u8fed\u4ee3\u5668\u53ef\u4ee5\u5b89\u5168\u5730\u5220\u9664\u5217\u8868\u4e2d\u7684\u5143\u7d20\uff0c\u56e0\u4e3a\u5b83\u4e0d\u4f1a\u5f15\u53d1 ConcurrentModificationException<\/code>\u3002<\/p>\n\n\n\n
import java.util.ArrayList;
import java.util.Iterator;
\u200b
public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        list.add(3);
        list.add(4);
        list.add(5);
\u200b
        \/\/ \u4f7f\u7528\u8fed\u4ee3\u5668\u5220\u9664\u503c\u4e3a\u5076\u6570\u7684\u5143\u7d20
        Iterator<Integer> iterator = list.iterator();
        while (iterator.hasNext()) {
            Integer element = iterator.next();
            if (element % 2 == 0) {
                iterator.remove(); \/\/ \u4f7f\u7528\u8fed\u4ee3\u5668\u7684 remove() \u65b9\u6cd5
            }
        }
\u200b
        System.out.println(list); \/\/ \u8f93\u51fa: [1, 3, 5]
    }
}<\/pre>\n\n\n\n
\u65b9\u6cd5 2: \u4f7f\u7528\u5012\u5e8f\u5faa\u73af (for<\/code> \u5faa\u73af)<\/p>\n\n\n\n
\u4f7f\u7528\u5012\u5e8f\u5faa\u73af\u53ef\u4ee5\u4ece\u5217\u8868\u7684\u672b\u5c3e\u5f00\u59cb\u5220\u9664\u5143\u7d20\uff0c\u8fd9\u6837\u4e0d\u4f1a\u5f71\u54cd\u524d\u9762\u5143\u7d20\u7684\u7d22\u5f15\u3002<\/p>\n\n\n\n
import java.util.ArrayList;
\u200b
public class Main {
    public static void main(String[] args) {
        ArrayList<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        list.add(3);
        list.add(4);
        list.add(5);
\u200b
        \/\/ \u4f7f\u7528\u5012\u5e8f\u5faa\u73af\u5220\u9664\u503c\u4e3a\u5076\u6570\u7684\u5143\u7d20
        for (int i = list.size() - 1; i >= 0; i--) {
            Integer element = list.get(i);
            if (element % 2 == 0) {
                list.remove(i); \/\/ \u4f7f\u7528\u7d22\u5f15\u5220\u9664
            }
        }
\u200b
        System.out.println(list); \/\/ \u8f93\u51fa: [1, 3, 5]
    }
}<\/pre>\n\n\n\n
\u6ce8\u610f<\/h4>\n\n\n\n
    \n
  1. \u8fed\u4ee3\u5668\u6ce8\u610f\u4e8b\u9879\n
      \n
    • \u4f7f\u7528\u8fed\u4ee3\u5668\u5220\u9664\u5143\u7d20\u65f6\uff0c\u5fc5\u987b\u4f7f\u7528 iterator.remove()<\/code> \u65b9\u6cd5\uff0c\u800c\u4e0d\u662f list.remove()<\/code>\u3002<\/li>\n<\/ul>\n<\/li>\n\n\n\n
    • \u5012\u5e8f\u5faa\u73af\n
        \n
      • \u5982\u679c\u786e\u5b9a\u4e0d\u4f1a\u5220\u9664\u5217\u8868\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528\u5012\u5e8f\u5faa\u73af\uff0c\u8fd9\u6837\u53ef\u4ee5\u907f\u514d\u7d22\u5f15\u504f\u79fb\u7684\u95ee\u9898\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n
        Java\uff1alist\u4e2d\u589e\u52a0\u7684put\u66f4\u65b0\u8fc7\u7684map\u7684\u503c\u662f\u76f8\u540c\u7684<\/h2>\n\n\n\n
        \u4ee3\u7801<\/h4>\n\n\n\n
            public static void main(String[] args) {
        \u200b
                test test = new test();
        \u200b
                test.bugOne();
        \u200b
            }
        \u200b
            private void bugOne() {
        \u200b
                List<Map<String, Object>> list = new ArrayList<>();
                HashMap<String, Object> map = new HashMap<>();
        \u200b
                map.put(\"1\", \"1\");
                map.put(\"2\", \"2\");
                map.put(\"3\", \"3\");
                map.put(\"4\", \"4\");
                list.add(map);
        \u200b
                System.out.println(list);
        \u200b
                for (int i = 0; i < 2; i++) {
                    map.put(\"1\", \"11\" + i);
                    map.put(\"2\", \"22\" + i);
                    map.put(\"3\", \"33\" + i);
                    map.put(\"4\", \"44\" + i);
                    list.add(map);
                }
        \u200b
                System.out.println(list);
                
            }<\/pre>\n\n\n\n
        \u7ed3\u679c<\/h4>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        \u539f\u56e0<\/h4>\n\n\n\n
        \u5728 Java \u4e2d\uff0c\u200c\u5982\u679c\u5c06\u76f8\u540c\u7684 Map \u5bf9\u8c61\u591a\u6b21\u6dfb\u52a0\u5230 Lis t\u96c6\u5408\u4e2d\uff0c\u200c\u5219\u5728 List \u96c6\u5408\u4e2d\u5b58\u50a8\u7684 Map \u5bf9\u8c61\u5b9e\u9645\u4e0a\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n\n\n\n
        \u8fd9\u662f\u56e0\u4e3a\u5728 Java \u4e2d\uff0c\u901a\u8fc7\u53d8\u91cf\u548c\u96c6\u5408\u4e2d\u4fdd\u5b58\u7684\u662f\u5bf9\u8c61\u7684\u5f15\u7528\uff0c\u200c\u800c\u4e0d\u662f\u5bf9\u8c61\u672c\u8eab\u7684\u62f7\u8d1d\u3002\u200c<\/p>\n\n\n\n
        \u5f53\u4f7f\u7528\u76f8\u540c\u7684\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\u591a\u6b21\u8c03\u7528\u65b9\u6cd5\u65f6\uff0c\u200c\u5b9e\u9645\u4e0a\u662f\u591a\u6b21\u4f7f\u7528\u4e86\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u200c<\/p>\n\n\n\n
        \u56e0\u6b64\uff0c\u200c\u5982\u679c\u66f4\u6539\u5176\u4e2d\u4e00\u4e2a Map \u5bf9\u8c61\u7684\u503c\uff0c\u200c\u6240\u6709\u5728 List \u96c6\u5408\u4e2d\u5b58\u50a8\u7684 Map \u5bf9\u8c61\u90fd\u5c06\u53cd\u6620\u8fd9\u4e9b\u66f4\u6539\uff0c\u56e0\u4e3a\u5b83\u4eec\u5b9e\u9645\u4e0a\u662f\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u200c<\/p>\n\n\n\n
        \u89e3\u51b3<\/h4>\n\n\n\n
        \u91cd\u65b0 New \u4e00\u4e2a\u65b0\u7684 Map \u5bf9\u8c61\u7528\u6765\u5b58\u50a8\u6570\u636e<\/p>\n\n\n\n
            public static void main(String[] args) {
        \u200b
                test test = new test();
        \u200b
                test.bugOne();
        \u200b
            }
        \u200b
            private void bugOne() {
        \u200b
                List<Map<String, Object>> list = new ArrayList<>();
                HashMap<String, Object> map = new HashMap<>();
        \u200b
                map.put(\"1\", \"1\");
                map.put(\"2\", \"2\");
                map.put(\"3\", \"3\");
                map.put(\"4\", \"4\");
                list.add(map);
        \u200b
                System.out.println(list);
        \u200b
        \/\/        for (int i = 0; i < 2; i++) {
        \/\/            map.put(\"1\", \"11\" + i);
        \/\/            map.put(\"2\", \"22\" + i);
        \/\/            map.put(\"3\", \"33\" + i);
        \/\/            map.put(\"4\", \"44\" + i);
        \/\/            list.add(map);
        \/\/        }
        \u200b
                for (int i = 0; i < 2; i++) {
                    Map<String, Object> iMap = new HashMap<>();
                    iMap.put(\"1\", \"11\" + i);
                    iMap.put(\"2\", \"22\" + i);
                    iMap.put(\"3\", \"33\" + i);
                    iMap.put(\"4\", \"44\" + i);
                    list.add(iMap);
                }
        \u200b
                System.out.println(list);
                
            }<\/pre>\n\n\n\n
        \u6ce8\u610f<\/h4>\n\n\n\n
        \u6682\u65e0<\/p>\n\n\n\n
        Java\uff1aConcurrentModificationException\u5f02\u5e38<\/h2>\n\n\n\n
        \u4ee3\u7801<\/h4>\n\n\n\n
            public static void main(String[] args) {
        \u200b
                test test = new test();
        \u200b
                test.bugTwo();
        \u200b
            }
        \u200b
            private void bugTwo() {
        \u200b
                List<Map<String, Object>> list = new ArrayList<>();
                HashMap<String, Object> map = new HashMap<>();
        \u200b
                map.put(\"1\", \"1\");
                map.put(\"2\", \"2\");
                map.put(\"3\", \"3\");
                map.put(\"4\", \"4\");
                list.add(map);
        \u200b
                System.out.println(list);
        \u200b
                for (Map<String, Object> demo : list) {
        \u200b
                    for (int i = 0; i < 2; i++) {
                        Map<String, Object> iMap = new HashMap<>();
                        iMap.put(\"1\", \"11\" + i);
                        iMap.put(\"2\", \"22\" + i);
                        iMap.put(\"3\", \"33\" + i);
                        iMap.put(\"4\", \"44\" + i);
                        list.add(map);
                    }
        \u200b
                }
        \u200b
                System.out.println(list);
        \u200b
            }<\/pre>\n\n\n\n
        \u7ed3\u679c<\/h4>\n\n\n\n
        \"\"<\/div><\/figure>\n\n\n\n
        \u539f\u56e0<\/h4>\n\n\n\n
        ConcurrentModificationException \u662f Java \u4e2d\u7684\u4e00\u4e2a\u5f02\u5e38\u7c7b\u578b\uff0c\u5c5e\u4e8e java.util.ConcurrentModificationException \u7c7b\u3002\u5b83\u662f\u4e00\u79cd\u8fd0\u884c\u65f6\u5f02\u5e38\uff08RuntimeException\uff09\u3002<\/p>\n\n\n\n
        \u8fd9\u4e2a\u5f02\u5e38\u901a\u5e38\u53d1\u751f\u5728\u591a\u7ebf\u7a0b\u6216\u8005\u975e\u7ebf\u7a0b\u5b89\u5168\u7684\u4e0a\u4e0b\u6587\u4e2d\uff0c\u5f53\u4e00\u4e2a\u96c6\u5408\uff08\u6bd4\u5982 ArrayList\u3001LinkedList\u3001HashSet \u7b49\uff09\u6b63\u5728\u8fdb\u884c\u8fed\u4ee3\uff08\u904d\u5386\uff09\u65f6\uff0c\u6709\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u6216\u64cd\u4f5c\u4fee\u6539\u4e86\u8fd9\u4e2a\u96c6\u5408\u7684\u7ed3\u6784\uff08\u5982\u6dfb\u52a0\u3001\u5220\u9664\u6216\u66ff\u6362\u5143\u7d20\uff09\u3002<\/p>\n\n\n\n
        1\u3001\u5f53\u5728\u4f7f\u7528\u8fed\u4ee3\u5668\uff08Iterator\uff09\u6216\u589e\u5f3a\u578b for \u5faa\u73af\u904d\u5386\u96c6\u5408\u65f6\uff0c\u540c\u65f6\u5c1d\u8bd5\u4fee\u6539\u96c6\u5408\uff08\u9664\u4e86\u4f7f\u7528 Iterator \u7684 remove() \u65b9\u6cd5\u5916\uff09\uff0c\u4f1a\u5bfc\u81f4 ConcurrentModificationException\u3002<\/p>\n\n\n\n
        2\u3001\u5728\u591a\u7ebf\u7a0b\u73af\u5883\u4e0b\uff0c\u5982\u679c\u4e00\u4e2a\u7ebf\u7a0b\u6b63\u5728\u904d\u5386\u96c6\u5408\uff0c\u800c\u53e6\u4e00\u4e2a\u7ebf\u7a0b\u4fee\u6539\u4e86\u8fd9\u4e2a\u96c6\u5408\uff0c\u540c\u6837\u4f1a\u89e6\u53d1 ConcurrentModificationException\u3002<\/p>\n\n\n\n
        \u89e3\u51b3<\/h4>\n\n\n\n
        \u521b\u5efa\u4e00\u4e2a\u65b0\u7684 List \u8fdb\u884c\u6dfb\u52a0\u5143\u7d20<\/p>\n\n\n\n
            public static void main(String[] args) {
        \u200b
                test test = new test();
        \u200b
                test.bugTwo();
        \u200b
            }
        \u200b
            private void bugTwo() {
        \u200b
                List<Map<String, Object>> list = new ArrayList<>();
                HashMap<String, Object> map = new HashMap<>();
        \u200b
                map.put(\"1\", \"1\");
                map.put(\"2\", \"2\");
                map.put(\"3\", \"3\");
                map.put(\"4\", \"4\");
                list.add(map);
        \u200b
                System.out.println(list);
        \/\/        for (Map<String, Object> demo : list) {
        \/\/
        \/\/            for (int i = 0; i < 2; i++) {
        \/\/                Map<String, Object> iMap = new HashMap<>();
        \/\/                iMap.put(\"1\", \"11\" + i);
        \/\/                iMap.put(\"2\", \"22\" + i);
        \/\/                iMap.put(\"3\", \"33\" + i);
        \/\/                iMap.put(\"4\", \"44\" + i);
        \/\/                list.add(map);
        \/\/            }
        \/\/
        \/\/        }
        \u200b
                List<Map<String, Object>> listCopy = new ArrayList<>();
        \u200b
                for (Map<String, Object> demo : list) {
        \u200b
                    listCopy.add(demo);
        \u200b
                    for (int i = 0; i < 2; i++) {
                        Map<String, Object> iMap = new HashMap<>();
                        iMap.put(\"1\", \"11\" + i);
                        iMap.put(\"2\", \"22\" + i);
                        iMap.put(\"3\", \"33\" + i);
                        iMap.put(\"4\", \"44\" + i);
                        listCopy.add(iMap);
                    }
        \u200b
                }
        \u200b
                list.clear();
                list.addAll(listCopy);
        \u200b
                System.out.println(list);
        \u200b
            }<\/pre>\n\n\n\n
        \u6ce8\u610f<\/h4>\n\n\n\n
        \u6682\u65e0<\/p>\n","protected":false},"excerpt":{"rendered":"
        Java\uff1a\u65f6\u95f4\u5b57\u7b26\u4e32\u8f6c\u6362\u65f6\u95f4\u95ee\u9898 \u4ee3\u7801     public static void ma […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[46],"class_list":["post-4900","post","type-post","status-publish","format-standard","hentry","category-java-","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4900"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4900"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4900\/revisions"}],"predecessor-version":[{"id":4906,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/4900\/revisions\/4906"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4900"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4900"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4900"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}