- 首页 > it技术 > >
public class Student {
int id;
String name;
String gender;
int age;
public Student() {
System.out.println("=1");
}public Student(int id, String name) {
this(id,name,null);
System.out.println("=2");
}public Student(int id, String name, String gender) {
//从构造方法调用另一个重载的构造方法，目的是减少代码的重复
this(id,name,gender,0);
System.out.println("=3");
}public Student(int id, String name, String gender, int age) {
this.id = id;
this.name = name;
this.gender = gender;
this.age = age;
System.out.println("=4");
}public String toString() {
return "(id:" + id
+ ", name:" + name
+ ", gender:" + gender
+ ", age:" + age + ")";
}}
推荐阅读
