java类构造方法的使用

之前一直用的python，python编程不用想很多变量类型的事情，java不管返回还是定义还是传参都要预先定义变量类型，而且变量类型相对也更丰富，无奈java香。

package com.it.demo;

public class Student {
    // members variable
    private String name;
    private int age;

    // init method
    public Student(){}

    public Student(String name, int age){
        this.name = name;
        this.age = age;
    }

    // member method
    public void setName(String name){
        this.name = name;
    }
    public String getName(){
        return name;
    }
    public void setAge(int age){
        this.age = age;
    }
    public int getAge(){
        return age;
    }
}

package com.it.demo;

public class TestStudent {
    public static void main(String[] args){
        // no var init
        Student s = new Student();
        s.setName("Maria");
        s.setAge(18);
        System.out.println(s.getName());
        System.out.println(s.getAge());

        // with var using init
        Student s2 = new Student("赵丽颖",29);
        System.out.println(s2.getName() + ": " + s2.getAge());
    }
}