写一个学生类，包括属性，用无参构造

Question

写一个学生类，包括属性：学号，班号，姓名，年龄，性别：要求用无参构造，方法获得：学号，班号，姓名，年龄(只能小于100岁，大于1，否则重新输入)， 性别(只能男或者女，否则重新输入)，最后在主函数输出你对一个学生对象赋值的信息。

Answer 1

<span class="hljs-meta">@Test</span>
  <span class="hljs-keyword">public</span> <span class="hljs-built_in">void</span> <span class="hljs-title function_">test001</span>(<span class="hljs-params"></span>) {
    <span class="hljs-comment">/**
     * 写一个学生类，包括属性：学号，班号，姓名，年龄，性别：要求用无参构造，
     * 方法获得：学号，班号，姓名，年龄(只能小于100岁，大于1，否则重新输入)， 性别(只能男或者女，否则重新输入)，最后在主函数输出你对一个学生对象赋值的信息。
     */</span>
    <span class="hljs-keyword">class</span> <span class="hljs-title class_">Student</span> {
      <span class="hljs-keyword">private</span> <span class="hljs-title class_">String</span> <span class="hljs-built_in">number</span>;
      <span class="hljs-keyword">private</span> <span class="hljs-title class_">String</span> classNum;
      <span class="hljs-keyword">private</span> <span class="hljs-title class_">String</span> name;
      <span class="hljs-keyword">private</span> <span class="hljs-title class_">Integer</span> age;
      <span class="hljs-keyword">private</span> <span class="hljs-title class_">String</span> gender;
      <span class="hljs-title class_">Student</span>() {
      }

      <span class="hljs-keyword">public</span> <span class="hljs-built_in">void</span> <span class="hljs-title function_">setStudent</span>(<span class="hljs-params"><span class="hljs-built_in">String</span> <span class="hljs-built_in">number</span>, <span class="hljs-built_in">String</span> classNum, <span class="hljs-built_in">String</span> name, Integer age, <span class="hljs-built_in">String</span> gender</span>) {
        <span class="hljs-variable language_">this</span>.<span class="hljs-property">number</span> = <span class="hljs-built_in">number</span>;
        <span class="hljs-variable language_">this</span>.<span class="hljs-property">classNum</span> = classNum;
        <span class="hljs-variable language_">this</span>.<span class="hljs-property">name</span> = name;
        <span class="hljs-keyword">if</span> (age > <span class="hljs-number">100</span> || age < <span class="hljs-number">1</span>) {
          <span class="hljs-keyword">throw</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">RuntimeException</span>(<span class="hljs-string">"年龄不可小于1或大于100"</span>);
        }
        <span class="hljs-variable language_">this</span>.<span class="hljs-property">age</span> = age;
        <span class="hljs-variable language_">this</span>.<span class="hljs-property">gender</span> = gender;
      }

      <span class="hljs-keyword">public</span> <span class="hljs-built_in">void</span> <span class="hljs-title function_">display</span>(<span class="hljs-params"></span>) {
        <span class="hljs-title class_">System</span>.<span class="hljs-property">out</span>.<span class="hljs-title function_">println</span>(
          <span class="hljs-string">"Student{"</span> + <span class="hljs-string">"number='"</span> + <span class="hljs-built_in">number</span> + <span class="hljs-string">'\''</span> + <span class="hljs-string">", classNum='"</span> + classNum + <span class="hljs-string">'\''</span> + <span class="hljs-string">", name='"</span> + name + <span class="hljs-string">'\''</span>
            + <span class="hljs-string">", age="</span> + age + <span class="hljs-string">", gender='"</span> + gender + <span class="hljs-string">'\''</span> + <span class="hljs-string">'}'</span>);
      }
    }
    <span class="hljs-title class_">Student</span> student = <span class="hljs-keyword">new</span> <span class="hljs-title class_">Student</span>();
    student.<span class="hljs-title function_">setStudent</span>(<span class="hljs-string">"001"</span>, <span class="hljs-string">"010"</span>, <span class="hljs-string">"张三"</span>, <span class="hljs-number">18</span>, <span class="hljs-string">"Meal"</span>);
    student.<span class="hljs-title function_">display</span>();
  }