{"id":1212,"date":"2022-10-27T22:55:31","date_gmt":"2022-10-27T14:55:31","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1212"},"modified":"2022-12-19T20:15:24","modified_gmt":"2022-12-19T12:15:24","slug":"%e9%9b%86%e5%90%88-%e5%a4%8d%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1212","title":{"rendered":"\u96c6\u5408-\u590d\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>1. \u96c6\u5408Collection\u4e2d\u5b58\u50a8\u7684\u5982\u679c\u662f\u81ea\u5b9a\u4e49\u7c7b\u7684\u5bf9\u8c61\uff0c\u9700\u8981\u81ea\u5b9a\u4e49\u7c7b\u91cd\u5199\u54ea\u4e2a\u65b9\u6cd5\uff1f\u4e3a\u4ec0\u4e48\uff1f\nequals()\u65b9\u6cd5\u3002\tcontains()\/remove()\/retainsAll()....\nList\uff1aequals()\u65b9\u6cd5\nSet\uff1a(HashSet\u3001LinkedHashSet\u4e3a\u4f8b)\uff1aequals()\u3001hashCode()\n        (TreeSet\u4e3a\u4f8b)\uff1aComparable\uff1acompareTo(Object obj)\n\t               Comparator\uff1acompare(Object o1, Object o2)\n\n\n2 .ArrayList,LinkedList,Vector\u4e09\u8005\u7684\u76f8\u540c\u70b9\u4e0e\u4e0d\u540c\u70b9\uff1f\u3010\u9762\u8bd5\u9898\u3011\n\u76f8\u540c\u70b9 \u4e09\u8005\u90fd\u662fList\u63a5\u53e3\u7684\u5b9e\u73b0\u7c7b\uff0cList\u662f\u6709\u5e8f\u53ef\u91cd\u590d\u7684\uff0c\u6240\u4ee5\u4e09\u8005\u90fd\u662f\u6709\u5e8f\u53ef\u91cd\u590d\u7684\n\u4e0d\u540c\u70b9 ArrayList\u5e95\u5c42\u5b58\u50a8\u6570\u636e\u7684\u7ed3\u6784\u662f\u6570\u7ec4\u7684\u5f62\u5f0f\uff0c\u662f\u4e3b\u8981\u5b9e\u73b0\u7c7b\u3002\n\t\t\u5728jdk7\u4e2d\u8fdb\u884c\u5b9e\u4f8b\u5316\u7684\u65f6\u5019\u5e95\u5c42\u4f1a\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a10\u7684\u6570\u7ec4\uff0c\u5982\u679c\u6570\u7ec4\u957f\u5ea6\u4e0d\u591f\u5b58\u50a8\u6570\u636e\uff0c\u4f1a\u8fdb\u884c\u6269\u5145\uff0c\u6bcf\u6b21\u6269\u5145\u4e3a\u539f\u6765\u76841.5\u500d\n\t\t\u5728jdk8\u4e2d\u8fdb\u884c\u5b9e\u4f8b\u5316\u7684\u65f6\u5019\u5e95\u5c42\u4e0d\u4f1a\u8fdb\u884c\u521b\u5efa\u6570\u636e\uff0c\u4f46\u5728\u8fdb\u884c\u6dfb\u52a0\u64cd\u4f5c\u7684\u65f6\u5019\u5e95\u5c42\u4f1a\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a10\u7684\u6570\u7ec4\uff0c\u6269\u5145\u64cd\u4f5c\u540cjdk7\u4e00\u81f4\n\t\t\u5982\u679c\u5728\u5b58\u50a8\u56fa\u5b9a\u91cf\u7684\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5e26\u53c2\u7684\u6784\u9020\u5668\u5b9e\u4f8b\u5316\u9700\u8981\u6570\u636e\u957f\u5ea6\u7684\u5bf9\u8c61\u3002\n\t\tArrayList\u67e5\u627e\u6548\u7387\u9ad8\uff0c\u590d\u6742\u5ea6\u4e3ao(1)\uff08LinkedList\u67e5\u627e\u590d\u6742\u5ea6\u4e3ao(n)\uff09\uff0cArrayList\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\n           LinkedList\u5e95\u5c42\u5b58\u50a8\u6570\u636e\u7684\u7ed3\u6784\u662f\u53cc\u5411\u94fe\u8868\u7684\u5f62\u5f0f\uff0c\n\t\t\u5728\u9700\u8981\u8fdb\u884c\u9891\u7e41\u7684\u63d2\u5165\u548c\u5220\u9664\u64cd\u4f5c\u65f6\uff0c\u4f7f\u7528LinkedList\u6548\u7387\u8981\u6bd4ArrayList\u6548\u7387\u9ad8(LinkedList\u5220\u9664\u590d\u6742\u5ea6\u4e3ao(1)\uff0cArrayList\u5220\u9664\u590d\u6742\u5ea6\u4e3ao(n))\uff0cLinkedList\u4e5f\u662f\u7ebf\u7a0b\u4e0d\u5b89\u5168\u7684\n           Vector\u5e95\u5c42\u5b58\u50a8\u6570\u636e\u7684\u7ed3\u6784\u662f\u6570\u7ec4\u7684\u5f62\u5f0f\uff0c\n\t\t\u5728\u8fdb\u884c\u5b9e\u4f8b\u5316\u7684\u65f6\u5019\u5e95\u5c42\u4f1a\u521b\u5efa\u4e00\u4e2a\u957f\u5ea6\u4e3a10\u7684\u6570\u7ec4\uff0c\u6bcf\u6b21\u6269\u5145\u4e3a\u539f\u6765\u76842\u500d\uff0c\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\uff0c\u4f5c\u4e3a\u53e4\u8001\u5b9e\u73b0\u7c7b\u51fa\u73b0\uff0c\u6548\u7387\u4f4e\uff0c\u57fa\u672c\u4e0a\u4e0d\u7528\u3002\n\nList Map\tSet\n\n3. List \u63a5\u53e3\u7684\u5e38\u7528\u65b9\u6cd5\u6709\u54ea\u4e9b\uff1f\uff08\u589e\u3001\u5220\u3001\u6539\u3001\u67e5\u3001\u63d2\u3001\u957f\u5ea6\u3001\u904d\u5386\uff09\n\u589e\uff1aadd(Object obj)\n\u5220\uff1aremove(Object obj)\/remove(int index)\n\u6539\uff1aset(int index,Object obj)\n\u67e5\uff1aget(int index)\n\u63d2\uff1aadd(int index,Object obj)\n\u957f\u5ea6\uff1asize()\n\u904d\u5386\uff1a\u4f7f\u7528\uff1aIterator\u3001foreach\u3001\u666e\u901a\u7684for\n\n4. \u5982\u4f55\u4f7f\u7528Iterator\u548c\u589e\u5f3afor\u5faa\u73af\u904d\u5386List\u3002\u4e3e\u4f8b\u8bf4\u660e\n\n5. Set \u5b58\u50a8\u6570\u636e\u7684\u7279\u70b9\u662f\u4ec0\u4e48\uff1f\u5e38\u89c1\u7684\u5b9e\u73b0\u7c7b\u6709\u4ec0\u4e48\uff1f\u8bf4\u660e\u4e00\u4e0b\u5f7c\u6b64\u7684\u7279\u70b9\u3002\nSet\u5b58\u50a8\u6570\u636e\u7684\u7279\u70b9\u662f\u65e0\u5e8f\u7684\uff0c\u4e0d\u53ef\u91cd\u590d\u7684\n\u5e38\u89c1\u7684\u5b9e\u73b0\u7c7b\uff1aHashSet\tLinkedHashSet\tTreeSet\n\t       HashMap\tLinkedHashMap\tTreeMap<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P542;\n\nimport org.junit.jupiter.api.Test;\n\nimport java.util.ArrayList;\nimport java.util.Iterator;\n\n\/**\n * @author RichieZhang\n * @create 2022-10-27 \u4e0b\u5348 12:48\n *\/\npublic class TraversTest {\n\n    @Test\n    public void test1(){\n        ArrayList list = new ArrayList();\n        list.add(123);\n        list.add(456);\n        list.add(\"\u4f60\u597d\");\n        list.add(new User(\"Tom\",22));\n        list.add(129);\n\n        Iterator iterator = list.iterator();\n        while (iterator.hasNext()){\n            System.out.println(iterator.next());\n        }\n\n        for (Object obj : list){\n            System.out.println(obj);\n        }\n    }\n}\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P542;\n\n\/**\n * @author RichieZhang\n * @create 2022-10-27 \u4e0b\u5348 1:00\n *\/\npublic class User {\n\n    private String name;\n    private int age;\n\n    public User() {\n    }\n\n    public User(String name, int age) {\n        this.name = name;\n        this.age = age;\n    }\n\n    public String getName() {\n        return name;\n    }\n\n    public void setName(String name) {\n        this.name = name;\n    }\n\n    public int getAge() {\n        return age;\n    }\n\n    public void setAge(int age) {\n        this.age = age;\n    }\n\n    @Override\n    public String toString() {\n        return \"User{\" +\n                \"name='\" + name + '\\'' +\n                \", age=\" + age +\n                '}';\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[33],"tags":[46],"class_list":["post-1212","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\/1212"}],"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=1212"}],"version-history":[{"count":2,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1212\/revisions"}],"predecessor-version":[{"id":2664,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1212\/revisions\/2664"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1212"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1212"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}