Java链式写法，子类继承父类的属性，也可以返回子类的对象，只是需要重写基类的Set方法
public class MyLS {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println(new Student().setName("1").setAge(21).toString());
System.out.println(new NAN().setName("2").setAge(20).setSex('男').toString());
System.out.println(new NV().setName("3").setAge(22).setSex('女').toString());
}
}
class Student{
private String name;
private Integer age;
public String getName() {
return name;
}
public Student setName(String name) {
this.name = name;
return this;
}
public Integer getAge() {
return age;
}
public Student setAge(Integer age) {
this.age = age;
return this;
}
@Override
public String toString() {
return "Student [name=" + name + ", age=" + age + ", getName()=" + getName() + ", getAge()=" + getAge() + "]";
}
}
class NAN extends Student{
private Character sex='男';
public Character getSex() {
return sex;
}
public NAN setSex(Character sex) {
this.sex = sex;
return this;
}
@Override
public NAN setName(String name) {
super.setName(name);
return this;
}
@Override
public NAN setAge(Integer age) {
// TODO Auto-generated method stub
super.setAge(age);
return this;
}
@Override
public String toString() {
return "NAN [sex=" + sex + ", getSex()=" + getSex() + ", getName()=" + getName() + ", getAge()=" + getAge()
+ "]";
}
}
class NV extends Student{
private Character sex='女';
public Character getSex() {
return sex;
}
public NV setSex(Character sex) {
this.sex = sex;
return this;
}
@Override
public NV setName(String name) {
super.setName(name);
return this;
}
@Override
public NV setAge(Integer age) {
// TODO Auto-generated method stub
super.setAge(age);
return this;
}
@Override
public String toString() {
return "NV [sex=" + sex + ", getSex()=" + getSex() + ", getName()=" + getName() + ", getAge()=" + getAge()
+ "]";
}
}