Question

如何在Java类中定义类属性ID

Answer 1

类属性：又叫做静态属性，即被static修饰。
public class Student {
private String name;
private String studentNum;
private String gender;
private Integer age;
private static Integer id;
static{
getId();
}
public Student() {
}
public Student(String name, String studentNum, String gender, Integer age) {
this.name = name;
this.studentNum = studentNum;
this.gender = gender;
this.age = age;
}
public static Integer getId(){
return id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getStudentNum() {
return studentNum;
}
public void setStudentNum(String studentNum) {
this.studentNum = studentNum;
}
public String getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}

@Override
public String toString() {
return "Student [name=" + name + ", studentNum=" + studentNum + ", gender=" + gender + ", age=" + age + "]";
}
}

Answer 2

具体能在说清楚一些吗？

追问

就是题目中类属性ID怎么定义，以及定义静态方法获取类ID属性

追答

能不能看你的 Student?