{"id":1205,"date":"2022-10-26T23:04:54","date_gmt":"2022-10-26T15:04:54","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1205"},"modified":"2022-11-27T12:39:48","modified_gmt":"2022-11-27T04:39:48","slug":"%e9%9b%86%e5%90%88-treeset%e7%9a%84%e8%87%aa%e7%84%b6%e6%8e%92%e5%ba%8f","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1205","title":{"rendered":"\u96c6\u5408-TreeSet\u7684\u81ea\u7136\u6392\u5e8f"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P540;\r\n\r\nimport org.junit.jupiter.api.Test;\r\n\r\nimport java.util.Iterator;\r\nimport java.util.TreeSet;\r\n\r\n\/**\r\n * @author RichieZhang\r\n * @create 2022-10-26 \u4e0b\u5348 10:18\r\n *\/\r\npublic class TreeSetTest {\r\n\r\n    \/*\r\n    1. \u5411TreeSet\u4e2d\u6dfb\u52a0\u7684\u6570\u636e\uff0c\u8981\u6c42\u662f\u76f8\u540c\u7c7b\u7684\u5bf9\u8c61\u3002\r\n    2. \u4e24\u79cd\u6392\u5e8f\u65b9\u5f0f\uff1a\u81ea\u7136\u6392\u5e8f\uff08\u5b9e\u73b0Comparable\u63a5\u53e3\uff09 \u548c \u5b9a\u5236\u6392\u5e8f\r\n\r\n\r\n    3. \u81ea\u7136\u6392\u5e8f\u4e2d\uff0c\u6bd4\u8f83\u4e24\u4e2a\u5bf9\u8c61\u662f\u5426\u76f8\u540c\u7684\u6807\u51c6\u4e3a\uff1acompareTo()\u8fd4\u56de0.\u4e0d\u518d\u662fequals().\r\n     *\/\r\n\r\n    @Test\r\n    public void test1(){\r\n        TreeSet set = new TreeSet();\r\n\r\n        \/\/\u5931\u8d25\uff1a\u4e0d\u80fd\u6dfb\u52a0\u4e0d\u540c\u7c7b\u7684\u5bf9\u8c61\r\n\/\/        set.add(123);\r\n\/\/        set.add(456);\r\n\/\/        set.add(\"AA\");\r\n\/\/        set.add(new User(\"Tom\",12));\r\n\r\n        \/\/\u4e3e\u4f8b\u4e00\uff1a\r\n\/\/        set.add(34);\r\n\/\/        set.add(-34);\r\n\/\/        set.add(43);\r\n\/\/        set.add(11);\r\n\/\/        set.add(8);\r\n\r\n        \/\/\u4e3e\u4f8b\u4e8c\uff1a\r\n        set.add(new User(\"Tom\",12));\r\n        set.add(new User(\"Jerry\",32));\r\n        set.add(new User(\"Jim\",2));\r\n        set.add(new User(\"Mike\",65));\r\n        set.add(new User(\"Jack\",33));\r\n        set.add(new User(\"Jack\",56));\r\n\r\n        Iterator iterator = set.iterator();\r\n        while (iterator.hasNext()){\r\n            System.out.println(iterator.next());\r\n        }\r\n    }\r\n}\r\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>package top.qaqaq.java.P540;\r\n\r\n\/**\r\n * @author RichieZhang\r\n * @create 2022-10-26 \u4e0b\u5348 8:16\r\n *\/\r\npublic class User implements Comparable {\r\n\r\n    private String name;\r\n    private int age;\r\n\r\n    public User(){\r\n\r\n    }\r\n\r\n    public User(String name, int age) {\r\n        this.name = name;\r\n        this.age = age;\r\n    }\r\n\r\n    public String getName() {\r\n        return name;\r\n    }\r\n\r\n    public void setName(String name) {\r\n        this.name = name;\r\n    }\r\n\r\n    public int getAge() {\r\n        return age;\r\n    }\r\n\r\n    public void setAge(int age) {\r\n        this.age = age;\r\n    }\r\n\r\n    @Override\r\n    public String toString() {\r\n        return \"User{\" +\r\n                \"name='\" + name + '\\'' +\r\n                \", age=\" + age +\r\n                '}';\r\n    }\r\n\r\n    @Override\r\n    public boolean equals(Object o) {\r\n        System.out.println(\"User equals()....\");\r\n        if (this == o) return true;\r\n        if (o == null || getClass() != o.getClass()) return false;\r\n\r\n        User user = (User) o;\r\n\r\n        if (age != user.age) return false;\r\n        return name != null ? name.equals(user.name) : user.name == null;\r\n    }\r\n\r\n    @Override\r\n    public int hashCode() { \/\/return name.hashCode() + age;\r\n        int result = name != null ? name.hashCode() : 0;\r\n        result = 31 * result + age;\r\n        return result;\r\n    }\r\n\r\n    \/\/\u6309\u7167\u59d3\u540d\u4ece\u5927\u5230\u5c0f\u6392\u5217,\u5e74\u9f84\u4ece\u5c0f\u5230\u5927\u6392\u5217\r\n    @Override\r\n    public int compareTo(Object o) {\r\n        if(o instanceof User){\r\n            User user = (User) o;\r\n\/\/            return -this.name.compareTo(user.name);\r\n            int compare = -this.name.compareTo(user.name);\r\n            if (compare != 0){\r\n                return compare;\r\n            }else {\r\n                return Integer.compare(this.age, user.age);\r\n            }\r\n        }else {\r\n            throw new RuntimeException(\"\u8f93\u5165\u7684\u7c7b\u578b\u4e0d\u5339\u914d\");\r\n        }\r\n    }\r\n}\r\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":[8],"tags":[46],"class_list":["post-1205","post","type-post","status-publish","format-standard","hentry","category-java-code","tag-java"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1205"}],"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=1205"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1205\/revisions"}],"predecessor-version":[{"id":1206,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1205\/revisions\/1206"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}