有关于java的构造方法
一下代码的那2个构造方法有必要吗,作用做有什么好处吗????
public class Student {
private long id;
private String name;
private int age;
private boolean sex;
private Date birthday;
public Student() {
super();
}
public Student(long id, String name, int age, boolean sex, Date birthday) {
super();
this.id = id;
this.name = name;
this.age = age;
this.sex = sex;
this.birthday = birthday;
}
public long getId() {
return id;
}
public void setId(long id) {
this.id = id;
}
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 boolean getSex() {
return sex;
}
public void setSex(boolean sex) {
this.sex = sex;
}
public Date getBirthday() {
return birthday;
}
public void setBirthday(Date birthday) {
this.birthday = birthday;
}
}