package seven;

/**
 * this:
 * 1.可以用来修饰属性、方法、构造器
 * 2.this 理解为当前对象或当前正在创建的对象。比如：this.name,this.show();
 * 3.可以在构造器中通过「this(形参)」的方式显式的调用本类中其它重载的指定的构造器。
 *      要求：1.在构造器内部必须声明在首行！
 *          2.若一个类中有n个构造器，那么最多有 n-1 个构造器中使用了 this(形参);
 */
public class TestPerson {
    public static void main(String[] args) {
        Person p = new Person();
        p.setAge(20);
        p.info();
        p.setName("奥斯卡");
        p.info();

        System.out.println();

        Person p1 = new Person("马红俊", 11);
        p1.info();

        Person p2 = new Person(22);
        p2.info();
    }
}

class Person{
    private String name;
    private int age;

    public Person(){
        name = "三哥";
        age = 14;
    }
    public Person(String name){
        this(15);
        System.out.println("这是Person类中形参为name的构造器");
        this.name = name;
    }

    public Person(int age){
        this();
        this.age = age;
    }
    //this.name :表示当前正在创建的对象
    //name：是形参
    public Person(String name, int age){
//        this.name = name;
        //this():可以用来显式的调用当前类的重载的指定的构造器（根据形参判定）
        this(name);
        System.out.println("这是Person类中形参为name和age的构造器");
        this.age = age;
    }
//    public void setName(String n){
//        name = n;
//    }
    //this.name :表示当前对象的属性
    //name：是形参
    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;
    }
    public void eat(){
        System.out.println("就餐");
    }
    public void sleep(){
        System.out.println("就寝");
    }
    public void info(){
        System.out.println("name:" + this.name + "age:" + this.age);
        this.show();
    }
    public void show(){
        System.out.println("The Chinese culture");
    }
}

package seven;

/**
 * 4.编写两个类，TriAngle和TestTriAngle，其中TriAngle中声明私有的底边长base和高height，
 * 同时声明公共方法访问私有变量；另一个类中使用这些公共方法，计算三角形的面积。
 */
public class TestTriAngle { //Angle ：角
    public static void main(String[] args) {
        TriAngle t = new TriAngle();
        t.setBase(2.3);
        t.setHeight(1.2);
        System.out.println("面积为：" + t.findArea());
    }
}

class TriAngle{
    private double base;//底边长
    private double height;//高

    public TriAngle(){
        this.base = 1.0;
        this.height = 1.0;
    }
    public TriAngle(double base,double height){
        this.base = base;
        this.height = height;
    }
    public double getBase(){
        return base;
    }
    public double getHeight(){
        return height;
    }
    public void setBase(double base){
        this.base = base;
    }
    public void setHeight(double height){
        this.height = height;
    }
    public double findArea(){
        return this.base * this.height / 2;
    }
}

package seven;

/**
 * 1、写一个名为Account的类模拟账户。该类的属性和方法如下图所示。该类包括的属性：账号id，余额balance，
 年利率annualInterestRate；包含的方法：访问器方法（getter和setter方法），取款方法withdraw()，存款方法deposit()。

 提示：在提款方法withdraw中，需要判断用户余额是否能够满足提款数额的要求，如果不能，应给出提示。
 */
public class Account {
    private int id;//账号
    private double balance;//余额
    private double annualInterestRate;//年利率

    public Account(int id, double balance, double annualInterestRate){
        this.id = id;
        this.balance = balance;
        this.annualInterestRate = annualInterestRate;
    }

    public int getId(){
        return id;
    }
    public void setId(int id){
        this.id = id;
    }
    public double getBalance(){
        return balance;
    }
    public void setBalance(double balance){
        this.balance = balance;
    }
    public double getAnnualInterestRate(){
        return annualInterestRate;
    }
    public void setAnnualInterestRate(double annualInterestRate){
        this.annualInterestRate = annualInterestRate;
    }

    //取钱
    public void withdraw (double amount){
        if(balance >= amount){
            balance -= amount;
            System.out.println("成功取出： " + amount);
        }else {
            System.out.println("余额不足，取款失败");
        }
    }
    //存钱
    public void deposit (double amount){
        balance += amount;
        System.out.println("成功存入：" + amount);
    }
}

package seven;

/**
 * a. 声明三个私有对象属性：firstName、lastName和account。
 * b. 声明一个公有构造器，这个构造器带有两个代表对象属性的参数（f和l）
 * c. 声明两个公有存取器来访问该对象属性，方法getFirstName和getLastName返回相应的属性。
 * d. 声明setAccount 方法来对account属性赋值。
 * e. 声明getAccount 方法以获取account属性。
 */

public class Customer {
    private String firstName;
    private String lastName;
    private Account account;

    public Customer(String f, String l){

        this.firstName = f;
        this.lastName = l;
    }

    public Account getAccount(){
        return account;
    }
    public void setAccount(Account account){
        this.account = account;
    }
    public String getFirstName(){
        return firstName;
    }
    public String getLastName(){
        return lastName;
    }

}

package seven;

/**
 * 3.写一个测试程序。
 * （1）	创建一个Customer ，名字叫 Jane Smith, 他有一个账号为1000，余额为2000元，年利率为 1.23％ 的账户。
 * （2）	对Jane Smith操作。
 * 存入 100 元，再取出960元。再取出2000元。
 * 打印出Jane Smith 的基本信息
 */
public class TestCustomer {
    public static void main(String[] args) {
        Customer cust = new Customer("Jane", "Smith");
        cust.setAccount(new Account(100,2000,0.0123));
        Account account = cust.getAccount();

        account.deposit(100);
        account.withdraw(960);
        account.withdraw(2000);

        System.out.println("Customer [" + cust.getLastName() + "," + cust.getFirstName() + "] hao a account" + account.getId()
        + ",annualInterestRate" + account.getAnnualInterestRate()*100 + "%,balance is" + account.getBalance());
    }
}

package seven;

public class Boy {
    private String name;
    private int age;
    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }
    public int getAge(){
        return age;
    }
    public void setAge(int age){
        this.age = age;
    }
    public void marry(Girl girl){
        System.out.println("我要娶" + girl.getName());
    }
    public void shout(){
        if(this.age >= 22){
            System.out.println("我到法定结婚年龄了");
        }else{
            System.out.println("还是先谈谈恋爱吧");
        }
    }

}

package seven;

public class Girl {
    private String name;

    public String getName(){
        return name;
    }
    public void setName(String name){
        this.name = name;
    }

    public void marry(Boy boy){
        System.out.println("我要嫁给" + boy.getName());
        boy.marry(this);
    }
}

package seven;

public class TestBoyGirl {
    public static void main(String[] args) {
        Boy boy = new Boy();
        boy.setName("徐三石");
        boy.setAge(20);

        Girl girl = new Girl();
        girl.setName("江楠楠");

        boy.marry(girl);
        boy.shout();

        System.out.println();
        girl.marry(boy);
    }
}