java--面向对象之封装（有参构造和无参构造）-蒲公英云

java--面向对象之封装（有参构造和无参构造）

package test;

public class Person {
private String name;
private String sex;
private int age;

public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public Person(String name, String sex, int age) {
this.name = name;
this.sex = sex;
this.age = age;
}
public Person() {

}
public void display(){
System.out.println(“名字：”+this.name+” 性别：”+this.sex+” 年龄：”+this.age);
}
/*public String show(String name, String sex, int age){
return “名字：”+this.name+” 性别：”+this.sex+” 年龄：”+this.age;
}*/

}

Test:

package test;

import org.junit.Test;

public class jTest {
@Test
public void test1(){
//无参构造
Person p1=new Person();
Person p2=new Person();
Person p3=new Person();
p1.setName(“张三”);
p1.setSex(“男”);
p1.setAge(19);
p2.setName(“张”);
p2.setSex(“男”);
p2.setAge(19);
p3.setName(“三”);
p3.setSex(“男”);
p3.setAge(19);
//String totle=p1.show(“张三”,”男”,19);
System.out.println(“名字：”+p1.getName()+” 性别：”+p1.getSex()+” 年龄：”+p1.getAge());
System.out.println(“名字：”+p2.getName()+” 性别：”+p2.getSex()+” 年龄：”+p2.getAge());
System.out.println(“名字：”+p3.getName()+” 性别：”+p3.getSex()+” 年龄：”+p3.getAge());

//有参构造
Person person1=new Person(“张三”,”男”,19);
Person person2=new Person(“李四”,”女”,21);
Person person3=new Person(“王五”,”男”,18);
person1.display();
person2.display();
person3.display();
}
}