在eclipse开发一个Student类？怎么写，能详细说一下吗？

在eclipse开发一个Student类(属性成员包括姓名name、学号num、年龄age)，要求实现其所有成员变量的get和set方法。

/*
 * 学生类
 */
public class Student {
    // 姓名
    private String name;
        private int num;
    // 年龄
    private int age;
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
    public int getAge() {
        return age;
    }
 
    public void setAge(int age) {
        this.age = age;
    }
 
        public int getNum() {
        return num;
    }
 
    public void setNum(int num) {
        this.num = num;
    }
}

class Student{
  String name, num;
  int age;
  public String getName() {
    return name;
  }
  public void setName(String name) {
    this.name = name;
  }
  public String getNum() {
    return num;
  }
  public void setNum(String num) {
    this.num = num;
  }
  public int getAge() {
    return age;
  }
  public void setAge(int age) {
    this.age = age;
  }
  
}

public class Student {

private String name;

private Integer num;

private Integer age;

/**
 * @return the name
 */
public String getName() {
    return name;
}

/**
 * @param name the name to set
 */
public void setName(String name) {
    this.name = name;
}

/**
 * @return the num
 */
public Integer getNum() {
    return num;
}

/**
 * @param num the num to set
 */
public void setNum(Integer num) {
    this.num = num;
}

/**
 * @return the age
 */
public Integer getAge() {
    return age;
}

/**
 * @param age the age to set
 */
public void setAge(Integer age) {
    this.age = age;
}

}