{"id":48581,"date":"2025-07-30T12:42:15","date_gmt":"2025-07-30T04:42:15","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/48581.html"},"modified":"2025-07-30T12:42:15","modified_gmt":"2025-07-30T04:42:15","slug":"%e5%ad%a6%e7%94%9f%e7%ae%a1%e7%90%86%e7%b3%bb%e7%bb%9f%e7%9a%84java%ef%bc%88%e5%9f%ba%e4%ba%8e%e9%9b%86%e5%90%88%ef%bc%89%e5%ae%9e%e7%8e%b0%e5%88%86%e6%9e%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/48581.html","title":{"rendered":"\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u7684Java\uff08\u57fa\u4e8e\u96c6\u5408\uff09\u5b9e\u73b0\u5206\u6790"},"content":{"rendered":"<h3>\u5f15\u8a00<\/h3>\n<p>\u5728Java\u5f00\u53d1\u4e2d&#xff0c;\u96c6\u5408\u6846\u67b6\u662f\u5b9e\u73b0\u52a8\u6001\u6570\u636e\u7ba1\u7406\u7684\u6838\u5fc3\u5de5\u5177\u3002\u672c\u6587\u5c06\u4ee5\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u4e3a\u4f8b&#xff0c;\u6df1\u5165\u89e3\u6790\u5982\u4f55\u901a\u8fc7Student&#xff08;JavaBean\u7c7b&#xff09;\u4e0eStudentSystem&#xff08;\u96c6\u5408\u7ba1\u7406\u7c7b&#xff09;\u7684\u534f\u4f5c&#xff0c;\u6784\u5efa\u4e00\u4e2a\u57fa\u4e8e\u96c6\u5408\u6846\u67b6\u7684\u5b66\u751f\u4fe1\u606f\u7ba1\u7406\u7cfb\u7edf\u3002\u901a\u8fc7\u5bf9\u6bd4\u4f20\u7edf\u6570\u7ec4\u7ba1\u7406\u65b9\u5f0f&#xff0c;\u6211\u4eec\u5c06\u63ed\u793a\u96c6\u5408\u6846\u67b6\u5728\u4ee3\u7801\u5065\u58ee\u6027\u3001\u53ef\u6269\u5c55\u6027\u548c\u5f00\u53d1\u6548\u7387\u65b9\u9762\u7684\u4f18\u52bf\u3002<\/p>\n<h3>\u4e00\u3001JavaBean\u7c7b\u8bbe\u8ba1&#xff1a;Student\u7c7b\u7684\u5b9e\u73b0<\/h3>\n<h4>1.1 JavaBean\u89c4\u8303\u6982\u8ff0<\/h4>\n<p>JavaBean\u662f\u4e00\u79cd\u7b26\u5408\u7279\u5b9a\u89c4\u8303\u7684Java\u7c7b&#xff0c;\u5176\u6838\u5fc3\u7279\u6027\u5305\u62ec&#xff1a;<\/p>\n<ul>\n<li>\u79c1\u6709\u5b57\u6bb5&#xff08;Private Fields&#xff09;<\/li>\n<li>\u516c\u5171getter\/setter\u65b9\u6cd5&#xff08;Public Getters\/Setters&#xff09;<\/li>\n<li>\u65e0\u53c2\u6784\u9020\u65b9\u6cd5&#xff08;Default Constructor&#xff09;<\/li>\n<li>\u53ef\u5e8f\u5217\u5316&#xff08;\u5b9e\u73b0Serializable\u63a5\u53e3&#xff09;<\/li>\n<\/ul>\n<p>\u5728\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u4e2d&#xff0c;Student\u7c7b\u4f5c\u4e3aJavaBean&#xff0c;\u8d1f\u8d23\u5c01\u88c5\u5b66\u751f\u7684\u57fa\u672c\u4fe1\u606f&#xff0c;\u5982ID\u3001\u59d3\u540d\u3001\u5e74\u9f84\u548c\u5730\u5740\u3002<\/p>\n<h4>1.2 Student\u7c7b\u4ee3\u7801\u5b9e\u73b0<\/h4>\n<p>import java.io.Serializable;<\/p>\n<p>public class Student implements Serializable {<br \/>\n    private static final long serialVersionUID &#061; 1L;<br \/>\n    private String id;      \/\/ \u5b66\u751f\u552f\u4e00\u6807\u8bc6<br \/>\n    private String name;    \/\/ \u59d3\u540d<br \/>\n    private int age;        \/\/ \u5e74\u9f84<br \/>\n    private String address; \/\/ \u5bb6\u5ead\u4f4f\u5740<\/p>\n<p>    \/\/ \u65e0\u53c2\u6784\u9020\u65b9\u6cd5&#xff08;JavaBean\u89c4\u8303\u8981\u6c42&#xff09;<br \/>\n    public Student() {}<\/p>\n<p>    \/\/ \u5168\u53c2\u6784\u9020\u65b9\u6cd5&#xff08;\u7528\u4e8e\u521d\u59cb\u5316\u5b8c\u6574\u6570\u636e&#xff09;<br \/>\n    public Student(String id, String name, int age, String address) {<br \/>\n        this.id &#061; id;<br \/>\n        this.name &#061; name;<br \/>\n        this.age &#061; age;<br \/>\n        this.address &#061; address;<br \/>\n    }<\/p>\n<p>    \/\/ Getter\u548cSetter\u65b9\u6cd5<br \/>\n    public String getId() { return id; }<br \/>\n    public void setId(String id) { this.id &#061; id; }<br \/>\n    public String getName() { return name; }<br \/>\n    public void setName(String name) { this.name &#061; name; }<br \/>\n    public int getAge() { return age; }<br \/>\n    public void setAge(int age) { this.age &#061; age; }<br \/>\n    public String getAddress() { return address; }<br \/>\n    public void setAddress(String address) { this.address &#061; address; }<br \/>\n}<\/p>\n<h4>1.3 \u8bbe\u8ba1\u7279\u70b9\u5206\u6790<\/h4>\n<li>\u5c01\u88c5\u6027&#xff1a;\u901a\u8fc7\u79c1\u6709\u5b57\u6bb5\u548c\u516c\u5171\u65b9\u6cd5\u63a7\u5236\u6570\u636e\u8bbf\u95ee&#xff0c;\u9632\u6b62\u5916\u90e8\u76f4\u63a5\u4fee\u6539\u5bf9\u8c61\u72b6\u6001\u3002<\/li>\n<li>\u53ef\u5e8f\u5217\u5316&#xff1a;\u5b9e\u73b0Serializable\u63a5\u53e3\u540e&#xff0c;\u5bf9\u8c61\u53ef\u901a\u8fc7\u6587\u4ef6\u6216\u7f51\u7edc\u4f20\u8f93&#xff0c;\u4e3a\u540e\u7eed\u6570\u636e\u6301\u4e45\u5316\u6253\u4e0b\u57fa\u7840\u3002<\/li>\n<li>\u6784\u9020\u65b9\u6cd5\u591a\u6837\u6027&#xff1a;\u65e0\u53c2\u6784\u9020\u6ee1\u8db3JavaBean\u89c4\u8303\u8981\u6c42&#xff0c;\u5168\u53c2\u6784\u9020\u7b80\u5316\u5bf9\u8c61\u521d\u59cb\u5316\u3002<\/li>\n<h3>\u4e8c\u3001\u96c6\u5408\u6846\u67b6\u5e94\u7528&#xff1a;StudentSystem\u7c7b\u7684\u5b9e\u73b0<\/h3>\n<h4>2.1 \u96c6\u5408\u6846\u67b6\u7684\u9009\u62e9\u4e0e\u4f18\u52bf<\/h4>\n<p>\u5728\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u4e2d&#xff0c;\u4f20\u7edf\u6570\u7ec4\u5b58\u5728\u4ee5\u4e0b\u5c40\u9650&#xff1a;<\/p>\n<ul>\n<li>\u5bb9\u91cf\u56fa\u5b9a&#xff1a;\u9700\u624b\u52a8\u6269\u5bb9&#xff0c;\u4ee3\u7801\u590d\u6742\u5ea6\u9ad8\u3002<\/li>\n<li>\u7ebf\u6027\u67e5\u627e&#xff1a;\u5220\u9664\/\u4fee\u6539\u64cd\u4f5c\u9700\u8981\u904d\u5386\u6570\u7ec4&#xff0c;\u65f6\u95f4\u590d\u6742\u5ea6O(n)\u3002<\/li>\n<li>\u5185\u5b58\u6cc4\u6f0f\u98ce\u9669&#xff1a;\u5220\u9664\u5143\u7d20\u540e\u672a\u7f6enull&#xff0c;\u53ef\u80fd\u5bfc\u81f4\u65e0\u6548\u5f15\u7528\u6b8b\u7559\u3002<\/li>\n<\/ul>\n<p>\u800cArrayList&lt;Student&gt;\u4f5c\u4e3a\u52a8\u6001\u6570\u7ec4&#xff0c;\u89e3\u51b3\u4e86\u4e0a\u8ff0\u95ee\u9898&#xff1a;<\/p>\n<ul>\n<li>\u81ea\u52a8\u6269\u5bb9&#xff1a;\u5185\u90e8\u7ef4\u62a4\u4e00\u4e2aObject\u6570\u7ec4&#xff0c;\u5f53\u5bb9\u91cf\u4e0d\u8db3\u65f6\u81ea\u52a8\u6269\u5c55\u4e3a1.5\u500d\u3002<\/li>\n<li>\u9ad8\u6548\u64cd\u4f5c&#xff1a;\u63d0\u4f9badd(),\u00a0remove(),\u00a0get()\u7b49\u65b9\u6cd5&#xff0c;\u7b80\u5316\u96c6\u5408\u64cd\u4f5c\u3002<\/li>\n<li>\u7ebf\u7a0b\u5b89\u5168&#xff1a;\u975e\u7ebf\u7a0b\u5b89\u5168\u8bbe\u8ba1\u63d0\u5347\u6027\u80fd&#xff0c;\u9002\u7528\u4e8e\u5355\u7ebf\u7a0b\u73af\u5883\u3002<\/li>\n<\/ul>\n<h4>2.2 StudentSystem\u7c7b\u6838\u5fc3\u529f\u80fd\u5b9e\u73b0<\/h4>\n<h5>2.2.1 \u6dfb\u52a0\u5b66\u751f\u529f\u80fd<\/h5>\n<p>public static void addStudent(ArrayList&lt;Student&gt; list) {<br \/>\n    Scanner sc &#061; new Scanner(System.in);<br \/>\n    String id;<br \/>\n    while (true) {<br \/>\n        System.out.print(&#034;\u8bf7\u8f93\u5165\u5b66\u751fID&#xff1a;&#034;);<br \/>\n        id &#061; sc.next();<br \/>\n        if (!isExist(list, id)) break;<br \/>\n        System.out.println(&#034;ID\u5df2\u5b58\u5728&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#xff01;&#034;);<br \/>\n    }<br \/>\n    System.out.print(&#034;\u8bf7\u8f93\u5165\u59d3\u540d&#xff1a;&#034;);<br \/>\n    String name &#061; sc.next();<br \/>\n    System.out.print(&#034;\u8bf7\u8f93\u5165\u5e74\u9f84&#xff1a;&#034;);<br \/>\n    int age &#061; sc.nextInt();<br \/>\n    System.out.print(&#034;\u8bf7\u8f93\u5165\u5730\u5740&#xff1a;&#034;);<br \/>\n    String address &#061; sc.next();<br \/>\n    Student student &#061; new Student(id, name, age, address);<br \/>\n    list.add(student); \/\/ \u5229\u7528ArrayList\u7684\u81ea\u52a8\u6269\u5bb9\u7279\u6027<br \/>\n    System.out.println(&#034;\u6dfb\u52a0\u6210\u529f&#xff01;&#034;);<br \/>\n}<\/p>\n<h5>2.2.2 \u5220\u9664\u5b66\u751f\u529f\u80fd<\/h5>\n<p>public static void deleteStudent(ArrayList&lt;Student&gt; list) {<br \/>\n    Scanner sc &#061; new Scanner(System.in);<br \/>\n    System.out.print(&#034;\u8bf7\u8f93\u5165\u8981\u5220\u9664\u7684ID&#xff1a;&#034;);<br \/>\n    String id &#061; sc.next();<br \/>\n    int index &#061; getIndexById(list, id);<br \/>\n    if (index !&#061; -1) {<br \/>\n        list.remove(index); \/\/ \u76f4\u63a5\u79fb\u9664\u5143\u7d20&#xff0c;ArrayList\u81ea\u52a8\u5904\u7406\u540e\u7eed\u5143\u7d20\u524d\u79fb<br \/>\n        System.out.println(&#034;\u5220\u9664\u6210\u529f&#xff01;&#034;);<br \/>\n    } else {<br \/>\n        System.out.println(&#034;\u672a\u627e\u5230\u8be5\u5b66\u751f&#xff01;&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<h5>2.2.3 \u4fee\u6539\u5b66\u751f\u4fe1\u606f\u529f\u80fd<\/h5>\n<p>public static void updateStudent(ArrayList&lt;Student&gt; list) {<br \/>\n    Scanner sc &#061; new Scanner(System.in);<br \/>\n    System.out.print(&#034;\u8bf7\u8f93\u5165\u8981\u4fee\u6539\u7684ID&#xff1a;&#034;);<br \/>\n    String id &#061; sc.next();<br \/>\n    int index &#061; getIndexById(list, id);<br \/>\n    if (index !&#061; -1) {<br \/>\n        Student student &#061; list.get(index);<br \/>\n        System.out.print(&#034;\u8bf7\u8f93\u5165\u65b0\u59d3\u540d&#xff1a;&#034;);<br \/>\n        student.setName(sc.next());<br \/>\n        System.out.print(&#034;\u8bf7\u8f93\u5165\u65b0\u5e74\u9f84&#xff1a;&#034;);<br \/>\n        student.setAge(sc.nextInt());<br \/>\n        System.out.print(&#034;\u8bf7\u8f93\u5165\u65b0\u5730\u5740&#xff1a;&#034;);<br \/>\n        student.setAddress(sc.next());<br \/>\n        System.out.println(&#034;\u4fee\u6539\u6210\u529f&#xff01;&#034;);<br \/>\n    } else {<br \/>\n        System.out.println(&#034;\u672a\u627e\u5230\u8be5\u5b66\u751f&#xff01;&#034;);<br \/>\n    }<br \/>\n}<\/p>\n<h5>2.2.4 \u67e5\u8be2\u5b66\u751f\u4fe1\u606f\u529f\u80fd<\/h5>\n<p>public static void queryStudent(ArrayList&lt;Student&gt; list) {<br \/>\n    if (list.isEmpty()) {<br \/>\n        System.out.println(&#034;\u6682\u65e0\u5b66\u751f\u6570\u636e&#xff01;&#034;);<br \/>\n        return;<br \/>\n    }<br \/>\n    System.out.println(&#034;ID\\\\t\u59d3\u540d\\\\t\u5e74\u9f84\\\\t\u5730\u5740&#034;);<br \/>\n    for (Student student : list) {<br \/>\n        System.out.printf(&#034;%s\\\\t%s\\\\t%d\\\\t%s\\\\n&#034;,<br \/>\n                student.getId(),<br \/>\n                student.getName(),<br \/>\n                student.getAge(),<br \/>\n                student.getAddress());<br \/>\n    }<br \/>\n}<\/p>\n<h4>2.3 \u8f85\u52a9\u65b9\u6cd5\u5b9e\u73b0<\/h4>\n<p>\/\/ \u68c0\u67e5ID\u662f\u5426\u5b58\u5728<br \/>\npublic static boolean isExist(ArrayList&lt;Student&gt; list, String id) {<br \/>\n    return getIndexById(list, id) !&#061; -1;<br \/>\n}<\/p>\n<p>\/\/ \u6839\u636eID\u67e5\u627e\u7d22\u5f15<br \/>\npublic static int getIndexById(ArrayList&lt;Student&gt; list, String id) {<br \/>\n    for (int i &#061; 0; i &lt; list.size(); i&#043;&#043;) {<br \/>\n        if (list.get(i).getId().equals(id)) {<br \/>\n            return i;<br \/>\n        }<br \/>\n    }<br \/>\n    return -1;<br \/>\n}<\/p>\n<h3>\u4e09\u3001\u96c6\u5408\u6846\u67b6\u7684\u6027\u80fd\u5206\u6790<\/h3>\n<table>\n<tr>\u64cd\u4f5c\u7c7b\u578b\u6570\u7ec4\u5b9e\u73b0&#xff08;StudentManagement&#xff09;ArrayList\u5b9e\u73b0&#xff08;StudentSystem&#xff09;<\/tr>\n<tbody>\n<tr>\n<td>\u5bb9\u91cf\u7ba1\u7406<\/td>\n<td>\u624b\u52a8\u6269\u5bb9&#xff0c;\u4ee3\u7801\u590d\u6742<\/td>\n<td>\u81ea\u52a8\u6269\u5bb9&#xff0c;\u5e95\u5c42\u5b9e\u73b0\u900f\u660e<\/td>\n<\/tr>\n<tr>\n<td>\u6dfb\u52a0\u64cd\u4f5c<\/td>\n<td>O(n)&#xff08;\u6269\u5bb9\u65f6&#xff09;<\/td>\n<td>\u5e73\u5747O(1)&#xff0c;\u6700\u574fO(n)<\/td>\n<\/tr>\n<tr>\n<td>\u5220\u9664\u64cd\u4f5c<\/td>\n<td>O(n)&#xff08;\u9700\u8981\u79fb\u52a8\u5143\u7d20&#xff09;<\/td>\n<td>O(n)&#xff08;\u76f4\u63a5remove(index)&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u67e5\u8be2\u64cd\u4f5c<\/td>\n<td>O(n)&#xff08;\u7ebf\u6027\u67e5\u627e&#xff09;<\/td>\n<td>O(n)&#xff08;\u904d\u5386\u96c6\u5408&#xff09;<\/td>\n<\/tr>\n<tr>\n<td>\u5185\u5b58\u5360\u7528<\/td>\n<td>\u56fa\u5b9a\u5bb9\u91cf&#xff0c;\u53ef\u80fd\u6d6a\u8d39<\/td>\n<td>\u52a8\u6001\u8c03\u6574&#xff0c;\u5185\u5b58\u5229\u7528\u7387\u9ad8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h3>\u56db\u3001\u603b\u7ed3<\/h3>\n<p>\u901a\u8fc7Student&#xff08;JavaBean\u7c7b&#xff09;\u4e0eStudentSystem&#xff08;\u96c6\u5408\u7ba1\u7406\u7c7b&#xff09;\u7684\u534f\u4f5c&#xff0c;\u6211\u4eec\u6784\u5efa\u4e86\u4e00\u4e2a\u57fa\u4e8e\u96c6\u5408\u6846\u67b6\u7684\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf\u3002\u8be5\u7cfb\u7edf\u901a\u8fc7\u4ee5\u4e0b\u4f18\u52bf\u5b9e\u73b0\u4e86\u9ad8\u6548\u7684\u6570\u636e\u7ba1\u7406&#xff1a;<\/p>\n<li>\u5c01\u88c5\u6027&#xff1a;Student\u7c7b\u9075\u5faaJavaBean\u89c4\u8303&#xff0c;\u786e\u4fdd\u6570\u636e\u5b89\u5168\u6027\u3002<\/li>\n<li>\u52a8\u6001\u6269\u5bb9&#xff1a;ArrayList\u81ea\u52a8\u7ba1\u7406\u5bb9\u91cf&#xff0c;\u964d\u4f4e\u5f00\u53d1\u590d\u6742\u5ea6\u3002<\/li>\n<li>\u9ad8\u6548\u64cd\u4f5c&#xff1a;\u96c6\u5408\u6846\u67b6\u63d0\u4f9b\u7684API\u7b80\u5316\u4e86\u589e\u5220\u6539\u67e5\u903b\u8f91\u3002<\/li>\n<li>\u6269\u5c55\u6027\u5f3a&#xff1a;\u53ef\u901a\u8fc7\u96c6\u6210\u5176\u4ed6\u96c6\u5408\u7c7b\u578b\u6216\u6570\u636e\u5e93\u5b9e\u73b0\u529f\u80fd\u5347\u7ea7\u3002<\/li>\n<p>\u5bf9\u4e8e\u5f00\u53d1\u8005\u800c\u8a00&#xff0c;\u7406\u89e3\u96c6\u5408\u6846\u67b6\u7684\u5185\u90e8\u673a\u5236&#xff08;\u5982ArrayList\u7684\u6269\u5bb9\u7b56\u7565\u3001HashMap\u7684\u54c8\u5e0c\u51b2\u7a81\u5904\u7406&#xff09;\u5c06\u6709\u52a9\u4e8e\u7f16\u5199\u66f4\u9ad8\u6548\u7684\u4ee3\u7801\u3002\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d&#xff0c;\u5efa\u8bae\u6839\u636e\u4e1a\u52a1\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u96c6\u5408\u7c7b\u578b&#xff0c;\u5e76\u7ed3\u5408\u5f02\u5e38\u5904\u7406\u3001\u6570\u636e\u6301\u4e45\u5316\u7b49\u6280\u672f\u6784\u5efa\u5065\u58ee\u7684\u7cfb\u7edf\u3002<\/p>\n<h3>\u4e94\u3001\u9644\u5f55<\/h3>\n<p>Student\u7c7b&#xff1a;<\/p>\n<p>public class Student {<br \/>\n    private String name;<br \/>\n    private int age;<br \/>\n    private String id;<br \/>\n    private String address;<\/p>\n<p>    public Student() {<br \/>\n    }<\/p>\n<p>    public Student(String name, int age, String id, String address) {<br \/>\n        this.name &#061; name;<br \/>\n        this.age &#061; age;<br \/>\n        this.id &#061; id;<br \/>\n        this.address &#061; address;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u83b7\u53d6<br \/>\n     * &#064;return name<br \/>\n     *\/<br \/>\n    public String getName() {<br \/>\n        return name;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u8bbe\u7f6e<br \/>\n     * &#064;param name<br \/>\n     *\/<br \/>\n    public void setName(String name) {<br \/>\n        this.name &#061; name;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u83b7\u53d6<br \/>\n     * &#064;return age<br \/>\n     *\/<br \/>\n    public int getAge() {<br \/>\n        return age;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u8bbe\u7f6e<br \/>\n     * &#064;param age<br \/>\n     *\/<br \/>\n    public void setAge(int age) {<br \/>\n        this.age &#061; age;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u83b7\u53d6<br \/>\n     * &#064;return id<br \/>\n     *\/<br \/>\n    public String getId() {<br \/>\n        return id;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u8bbe\u7f6e<br \/>\n     * &#064;param id<br \/>\n     *\/<br \/>\n    public void setId(String id) {<br \/>\n        this.id &#061; id;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u83b7\u53d6<br \/>\n     * &#064;return address<br \/>\n     *\/<br \/>\n    public String getAddress() {<br \/>\n        return address;<br \/>\n    }<\/p>\n<p>    \/**<br \/>\n     * \u8bbe\u7f6e<br \/>\n     * &#064;param address<br \/>\n     *\/<br \/>\n    public void setAddress(String address) {<br \/>\n        this.address &#061; address;<br \/>\n    }<br \/>\n}<\/p>\n<p>StudentSystem\u7c7b&#xff1a;<\/p>\n<p>import java.util.ArrayList;<br \/>\nimport java.util.Scanner;<\/p>\n<p>public class StudentSystem {<br \/>\n    static Scanner sc &#061; new Scanner(System.in);<br \/>\n    public static void main(String[] args) {<br \/>\n        ArrayList&lt;Student&gt; list &#061; new ArrayList&lt;&gt;();<br \/>\n        loop:<br \/>\n        while (true) {<br \/>\n            System.out.println(&#034;&#8212;&#8212;&#8212;&#8212;&#8212;\u5b66\u751f\u7ba1\u7406\u7cfb\u7edf&#8212;&#8212;&#8212;&#8212;&#8212;-&#034;);<br \/>\n            System.out.println(&#034;1.\u6dfb\u52a0\u5b66\u751f&#034;);<br \/>\n            System.out.println(&#034;2.\u5220\u9664\u5b66\u751f&#034;);<br \/>\n            System.out.println(&#034;3.\u4fee\u6539\u5b66\u751f&#034;);<br \/>\n            System.out.println(&#034;4.\u67e5\u8be2\u5b66\u751f&#034;);<br \/>\n            System.out.println(&#034;5.\u9000\u51fa&#034;);<br \/>\n            System.out.println(&#034;\u8bf7\u8f93\u5165\u60a8\u7684\u9009\u62e9&#xff1a;&#034;);<br \/>\n            Scanner sc &#061; new Scanner(System.in);<br \/>\n            String choose &#061; sc.next();<br \/>\n            \/\/\u5229\u7528lambda\u8868\u8fbe\u5f0f<br \/>\n            switch (choose) {<br \/>\n                case &#034;1&#034; -&gt; addStudent(list);<br \/>\n                case &#034;2&#034; -&gt; deleteStudent(list);<br \/>\n                case &#034;3&#034; -&gt; updateStudent(list);<br \/>\n                case &#034;4&#034; -&gt; queryStudent(list);<br \/>\n                case &#034;5&#034; -&gt; {<br \/>\n                    System.out.println(&#034;\u9000\u51fa&#034;);<br \/>\n                    break loop;<br \/>\n                }<br \/>\n                default -&gt; System.out.println(&#034;\u8f93\u5165\u6709\u8bef&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;);<br \/>\n            }<\/p>\n<p>            \/*switch (choose) {<br \/>\n                case &#034;1&#034;:<br \/>\n                    System.out.println(&#034;\u6dfb\u52a0\u5b66\u751f&#034;);<br \/>\n                    break;<br \/>\n                case &#034;2&#034;:<br \/>\n                    System.out.println(&#034;\u5220\u9664\u5b66\u751f&#034;);<br \/>\n                    break;<br \/>\n                case &#034;3&#034;:<br \/>\n                    System.out.println(&#034;\u4fee\u6539\u5b66\u751f&#034;);<br \/>\n                    break;<br \/>\n                case &#034;4&#034;:<br \/>\n                    System.out.println(&#034;\u67e5\u8be2\u5b66\u751f&#034;);<br \/>\n                    break;<br \/>\n                case &#034;5&#034;:<br \/>\n                    System.out.println(&#034;\u9000\u51fa&#034;);<br \/>\n                    break loop;<br \/>\n                    *\/\/*System.exit(0);*\/\/*<br \/>\n                default:<br \/>\n                    System.out.println(&#034;\u8f93\u5165\u6709\u8bef&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;);<br \/>\n                    break;<br \/>\n            }*\/<br \/>\n        }<br \/>\n    }<\/p>\n<p>    \/\/\u6dfb\u52a0\u5b66\u751f<br \/>\n    public static void addStudent(ArrayList&lt;Student&gt; list) {<br \/>\n        String id;<br \/>\n        while (true) {<br \/>\n            System.out.println(&#034;\u8bf7\u8f93\u5165\u5b66\u751fid&#xff1a;&#034;);<br \/>\n            id &#061; sc.next();<br \/>\n            if (isExist(list, id)) {<br \/>\n                System.out.println(&#034;id\u5df2\u5b58\u5728&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;);<br \/>\n            } else {<br \/>\n                break;<br \/>\n            }<br \/>\n        }<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u5b66\u751f\u59d3\u540d&#xff1a;&#034;);<br \/>\n        String name &#061; sc.next();<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u5b66\u751f\u5e74\u9f84&#xff1a;&#034;);<br \/>\n        int age &#061; sc.nextInt();<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u5b66\u751f\u5bb6\u5ead\u4f4f\u5740&#xff1a;&#034;);<br \/>\n        String address &#061; sc.next();<br \/>\n        Student s &#061; new Student(name, age, id, address);<br \/>\n        list.add(s);<br \/>\n        System.out.println(&#034;\u6dfb\u52a0\u5b66\u751f\u6210\u529f&#034;);<br \/>\n    }<\/p>\n<p>    \/\/\u5220\u9664\u5b66\u751f<br \/>\n    public static void deleteStudent(ArrayList&lt;Student&gt; list) {<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u8981\u5220\u9664\u7684\u5b66\u751fid&#xff1a;&#034;);<br \/>\n        String id &#061; sc.next();<br \/>\n        \/\/\u83b7\u53d6\u7d22\u5f15<br \/>\n        int index &#061; getIndexById(list, id);<br \/>\n        if (index !&#061; -1) {<br \/>\n            list.remove(index);\/\/\u5220\u9664<br \/>\n            System.out.println(&#034;\u5220\u9664id\u4e3a:&#034; &#043; id &#043; &#034;\u7684\u5b66\u751f\u6210\u529f&#034;);<br \/>\n        } else {<br \/>\n            System.out.println(&#034;id\u4e0d\u5b58\u5728&#xff0c;\u5220\u9664\u5931\u8d25&#034;);<br \/>\n        }<br \/>\n    }<\/p>\n<p>    \/\/\u4fee\u6539\u5b66\u751f<br \/>\n    public static void updateStudent(ArrayList&lt;Student&gt; list) {<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u8981\u4fee\u6539\u7684\u5b66\u751fid&#xff1a;&#034;);<br \/>\n        String id &#061; sc.next();<\/p>\n<p>        int index &#061; getIndexById(list, id);<br \/>\n        if (index &#061;&#061; -1) {<br \/>\n            System.out.println(&#034;\u8981\u4fee\u6539\u7684id&#034; &#043; id &#043; &#034;\u4e0d\u5b58\u5728&#xff0c;\u8bf7\u91cd\u65b0\u8f93\u5165&#034;);<br \/>\n            return;<br \/>\n        }<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u65b0\u7684\u59d3\u540d&#xff1a;&#034;);<br \/>\n        String name &#061; sc.next();<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u65b0\u7684\u5e74\u9f84&#xff1a;&#034;);<br \/>\n        int age &#061; sc.nextInt();<br \/>\n        System.out.println(&#034;\u8bf7\u8f93\u5165\u65b0\u7684\u5bb6\u5ead\u4f4f\u5740&#xff1a;&#034;);<br \/>\n        String address &#061; sc.next();<br \/>\n        list.get(index).setName(name);<br \/>\n        list.get(index).setAge(age);<br \/>\n        list.get(index).setAddress(address);<br \/>\n        System.out.println(&#034;\u4fee\u6539\u5b66\u751f\u4fe1\u606f\u6210\u529f&#034;);<br \/>\n        \/*Student s &#061; new Student(name,age,id,address);<br \/>\n        list.set(index,s);*\/<br \/>\n    }<\/p>\n<p>    \/\/\u67e5\u8be2\u5b66\u751f<br \/>\n    public static void queryStudent(ArrayList&lt;Student&gt; list) {<br \/>\n        if (list.size() &#061;&#061; 0) {<br \/>\n            System.out.println(&#034;\u5f53\u524d\u65e0\u5b66\u751f\u4fe1\u606f&#xff0c;\u8bf7\u6dfb\u52a0\u540e\u5728\u67e5\u8be2&#034;);<br \/>\n            return;\/\/\u9000\u51fa\u65b9\u6cd5<br \/>\n        }<br \/>\n        \/\/\u6253\u5370\u8868\u5934\u4fe1\u606f<br \/>\n        System.out.println(&#034;id\\\\t\u59d3\u540d\\\\t\u5e74\u9f84\\\\t\u5bb6\u5ead\u4f4f\u5740&#034;);<br \/>\n        \/\/\u904d\u5386\u96c6\u5408&#xff0c;\u83b7\u53d6\u6bcf\u4e00\u4e2a\u5b66\u751f\u5bf9\u8c61<br \/>\n        for (int i &#061; 0; i &lt; list.size(); i&#043;&#043;) {<br \/>\n            Student s &#061; list.get(i);<br \/>\n            System.out.println(s.getId() &#043; &#034;\\\\t&#034; &#043; s.getName() &#043; &#034;\\\\t&#034; &#043; s.getAge() &#043; &#034;\\\\t&#034; &#043; s.getAddress());<br \/>\n        }<br \/>\n    }<\/p>\n<p>    \/\/\u5224\u65adid\u662f\u5426\u91cd\u590d<br \/>\n    public static boolean isExist(ArrayList&lt;Student&gt; list, String id) {<br \/>\n        \/*for (int i &#061; 0; i &lt; list.size(); i&#043;&#043;) {<br \/>\n            Student s &#061; list.get(i);<br \/>\n            if (s.getId().equals(id)){<br \/>\n                return true;<br \/>\n            }<br \/>\n        }<br \/>\n        return false;*\/<br \/>\n        int index &#061; getIndexById(list, id);<br \/>\n        return index !&#061; -1;<br \/>\n    }<\/p>\n<p>    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