构造方法

public class Car {
    public Car() {
        System.out.println("构造方法");
    }
    public static void main(String[] args){
        Car p = new Car();

    }
}

 public class Car {
    String name;
    String color;
    int seat;

    public Car(String name, String color, int seat) {
        this.name = name;
        this.color = color;
        this.seat = seat;
        System.out.println("构造了一辆车");
    }

    public static void main(String[] args) {
        Car p = new Car("大黄蜂", "绿色", 5);
        System.out.println(p.name + p.color + p.seat);
    }
}

public class DaXia {
    String name;
    int age;
    String bangPai;
    String nickname;

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

    public DaXia(String name, int age, String bangPai, String nickname) {
        this.name = name;
        this.age = age;
        this.bangPai = bangPai;
        this.nickname = nickname;
    }
}

public class DaXia {
    String name;
    int age;
    String bangPai;
    String nickname;

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

    public DaXia(String name, int age, String bangPai, String nickname) {
        this(name, age, bangPai);
        this.nickname = nickname;
        System.out.println(this.name + this.age + this.bangPai + this.nickname);
    }

    public static void main(String[] args) {
        DaXia p = new DaXia("乔峰", 23, "少林", "乔帮主");
    }
}

public class Person {
    String name;
    String address;
    static String country = "大清";

    public Person(String name, String address) {
        this.name = name;
        this.address = address;

    }


    public static void main(String[] args) {
        Person p1 = new Person("张麻子", "北京四合院");
        Person p2 = new Person("黛西", "北京大裤衩");
        Person.country = "民国";
        System.out.println(p1.country);
        System.out.println(p2.country);

    }


}

 public class Person{
     public static void huo(){
         System.out.println("是人都想火");
     }
     public static void main(String[] args){
         huo(); // 由于是自己类. 可以直接访问静态方法
         Person.huo();// 最好呢, 还是用类名去访问. 
     }
 }
类中内容的加载顺序(简单):
 
 public class Person{
     {
         System.out.println("我是通用构造器");
     }
     static {
         System.out.println("我是静态构造器");
     }
     public Person(){
         System.out.println("我是构造方法");
     }
     public static void main(String[] args){
         new Person();
     }
 }