Nội dung kiến thức:
	- Exception
		-> Exception là gì?
		-> try .. catch .. finally
		-> Custom Exception
	- Lambda
		-> Áp dụng với interface có 1 function
	- Một số hàm tiện ích trong Java

	20 ung dung -> cung chay
	game -> P
		- UI -> T1
		- download file -> T2
		- music (sound) ...
		- animation ...
		....
		-> Chay // -> ???
	-> Tuan tu

	20 ung dung -> p1 -> p20
	CPU: 1 trieu/1s

	Da tien trinh: OS

#AgeException.java

/*
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 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public class AgeException extends Exception{
}

#Animal.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public abstract class Animal {
    String name;

    public Animal() {
    }

    public Animal(String name) {
        this.name = name;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
    
    public abstract void showSound();
}

#IRunning.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public interface IRunning {
    void onRunning();
}

#IShow.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 * @author teacher
 */
@FunctionalInterface
public interface IShow {
    void showMessage(String msg);
}

#Main.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

import java.util.Scanner;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 *
 * @author teacher
 */
public class Main {
    public static void main(String[] args) {
        //Crash -> Exception: Logic (Viết code lỗi), third party (Thư viên sử dụng), System (Thiết bị phần cứng, network, file, ...)
        //Logic
        /**
        Scanner scan = new Scanner(System.in);
        System.out.println("Nhap x = ");
        int x = scan.nextInt(); //Nhap ky tu ko phai so -> Exception
        System.out.println("Nhap y = ");
        int y = scan.nextInt();
        int z = x / y;//Exception -> Trong TH: y = 0 -> Chia cho 0
        System.out.println("Ket qua: " + z);
        
        int[] t = new int[3];//length = 3, index: 0 -> 2
        t[1] = 100;
        t[0] = 10;
        t[2] = 99;
        
        t[5] = 1000; //exception -> index = 5 -> khong nam trong pham vi dai index: 0 -> 2 -> scrash
        System.out.println("t[5] = " + t[5]);
        * */
        
        //Exception -> Logic -> Xu ly nhu the nao???
        //Code lai cho dung -> Sua lai code -> root cause
        /**Scanner scan = new Scanner(System.in);
        System.out.println("Nhap x = ");
        int x = scan.nextInt(); //Nhap ky tu ko phai so -> Exception
        System.out.println("Nhap y = ");
        int y = scan.nextInt();
        if(y != 0) {
           int z = x / y;//Exception -> Trong TH: y = 0 -> Chia cho 0
            System.out.println("Ket qua: " + z); 
        } else {
            System.out.println("Error -> Khong chia dc cho 0");
        }
        
        int[] t = new int[3];//length = 3, index: 0 -> 2
        t[1] = 100;
        t[0] = 10;
        t[2] = 99;
        
        if(t.length > 5) {
            t[5] = 1000; //exception -> index = 5 -> khong nam trong pham vi dai index: 0 -> 2 -> scrash
            System.out.println("t[5] = " + t[5]);
        } else {
            System.out.println("Index: 0 -> " + t.length + " < 5");
        }*/
        
        //block code -> try .. catch .. finally -> Ko su dung cach nay -> TEST -> Hieu cach dung -> Ap dung
        Scanner scan = new Scanner(System.in);
        System.out.println("Nhap x = ");
        int x = scan.nextInt(); //Nhap ky tu ko phai so -> Exception
        System.out.println("Nhap y = ");
        int y = scan.nextInt();
        try {
            int z = x / y;//Exception -> Trong TH: y = 0 -> Chia cho 0
            System.out.println("Ket qua: " + z);
        } catch(ArithmeticException e) {
            System.out.println("Chuong trinh bi crash (ArithmeticException)");
        } catch(Exception e) {
            System.out.println("Chuong trinh bi crash (Exception)");//log -> save text
        } finally {
            System.out.println("Finish -> Giai phong tai nguyen sau khi xu ly logic");
        }
        
        int[] t = new int[3];//length = 3, index: 0 -> 2
        t[1] = 100;
        t[0] = 10;
        t[2] = 99;
        
        try {
            t[5] = 1000; //exception -> index = 5 -> khong nam trong pham vi dai index: 0 -> 2 -> scrash
            System.out.println("t[5] = " + t[5]);
        } catch(ArrayIndexOutOfBoundsException e) {
            System.out.println("Chuong trinh bi crash (ArrayIndexOutOfBoundsException)");
        } catch(Exception e) {
            System.out.println("Chuong trinh bi crash (ArithmeticException)");
        } finally {
            System.out.println("Finish -> Giai phong tai nguyen sau khi xu ly logic");
        }
        
        //Custom Exception
        
        Student std = new Student();
        try {
            std.setAge(-10);
        } catch (AgeException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
    }
}

#Running.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public class Running implements IRunning{

    @Override
    public void onRunning() {
        System.out.println("Trien khai code tai day");
    }
    
}

#Student.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public class Student implements IRunning{
    int age;

    public Student() {
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) throws AgeException {
        if(age > 0) {
            this.age = age;
        } else {
//            System.out.println("Yeu cau age > 0");
            //Chu dong -> crash program -> dev kiem tra du lieu dau vao.
            throw new AgeException();
        }
    }

    @Override
    public void onRunning() {
        System.out.println("Student is running");
    }
}

#Test.java

/*
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 */
package com.gokisoft.c2209i.lesson07;

/**
 *
 * @author teacher
 */
public class Test {
    public static void main(String[] args) {
//        IRunning r = new IRunning();
//        Animal a = new Animal();
        //Anonymous Class
//        Running r = new Running(); //Khuyen khich -> Ko nen su dung cach nay -> Anonymous Class
        //Trong TH -> Logic trong onRunning -> Su dung khac nhau -> Tai cac block code khac nhau
        IRunning r = new IRunning() {
            @Override
            public void onRunning() {
                System.out.println("Trien khai logic tai day");
            }
        };
        
        r.onRunning();
        
        //C1:
        IRunning r1 = () -> {
            System.out.println("Trien khai logic tai day");
        };
        r1.onRunning();
        
        //C2:
        IRunning r2 = () -> System.out.println("Trien khai logic tai day");
        r2.onRunning();
        
        IShow s1 = new IShow() {
            @Override
            public void showMessage(String msg) {
            }
        };
        s1.showMessage("OKOK");
        
        //Cach 1
        IShow s2 = (String msg) -> {
            System.out.println("Trien khai logic tai day > " + msg);
        };
        s2.showMessage("OKOK");
        
        //Cach 2
        IShow s3 = (String msg) -> System.out.println("Trien khai logic tai day > " + msg);
        s3.showMessage("OKOK");
        
        //Cach 3
        IShow s4 = (msg) -> {
            System.out.println("Trien khai logic tai day > " + msg);
            System.out.println("Trien khai logic tai day > " + msg);
            System.out.println("Trien khai logic tai day > " + msg);
        };
        s4.showMessage("OKOK");
    }
}