#Main.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.lesson01;

import java.util.ArrayList;

/**
 *
 * @author teacher
 */
public class Main {
    static enum LIGHT_STATUS {ON, OFF}
    
    public static void main(String[] args) {
        /**
        System.out.println("Hello World!!!");
        
        Student std = new Student();
        
//        System.out.println(5/0);
        
        std.input();
        
        std.display();
        
        //Trang thai bat den / tat den -> den
        int status;//status = 1 ->Sang, 0: Tat
        
        LIGHT_STATUS st = LIGHT_STATUS.OFF;*/
        
        int[] t1 = {1, 100};
        
        int[] t2 = {3, 200, 1000};
        System.arraycopy(t1, 0, t2, 0, t1.length);
        
        for (int i = 0; i < t1.length; i++) {
            t2[i]  = t1[i];
        }
        
        System.out.println(t1.length);
        System.out.println(t2.length);
        
        for (int i : t2) {
            System.out.println(i);
        }
        
        t1 = null;
        t2 = null;
    }
}

#readme.txt

Kiến thức tổng quát:
	- Exception & Debug
	- Collections
		- List
		- Set
		- Map
	- File
		- Đọc/ghi nội dung dữ liệu (text, binary)
		- Zip
	- Thread
	- CSDL
	- Đa ngôn ngữ (Localization)
	- Log & Gen Docs
	- Lambda / Generic

	UI:
		Java Swing -> CSDL
		Java FX -> Project (Scheme Builder)
==========================================================
Nội dung bài học hôm này:
	- Exception & Debug
		- Debug -> Tìm ra lỗi chương trình -> Dòng code nào -> Fix
	- Collections
		- List
		- Set
		- Map

#Student.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.lesson01;

import java.util.Scanner;

/**
 *
 * @author teacher
 */
public class Student {
    String fullname;
    String address;

    public Student() {
    }

    public String getFullname() {
        return fullname;
    }

    public void setFullname(String fullname) {
        this.fullname = fullname;
    }

    public String getAddress() {
        return address;
    }

    public void setAddress(String address) {
        this.address = address;
    }
    
    public void input() {
        Scanner scan = new Scanner(System.in);
        
        System.out.println("Nhap ten: ");
        fullname = scan.nextLine();
        System.out.println("Nhap dia chi: ");
        address = scan.nextLine();
    }

    @Override
    public String toString() {
        return "Student{" + "fullname=" + fullname + ", address=" + address + '}';
    }
    
    public void display() {
        System.out.println(this);
    }
}

#Test.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.lesson01;

/**
 *
 * @author teacher
 */
public class Test {
    public static void main(String[] args) {
        //Don gian -> cach nay
        String s = "SINH VIEN APTECH";
        s += "12";
        s += "34";
        s += "45";
        s += "67";
        System.out.println(s);
        
//        s.concat("sdfsdf");
        
        //Cach 2
        StringBuilder builder = new StringBuilder();
        builder.append("234234");
        builder.append("234234");
        builder.append("234234");
        builder.append("234234");
        builder.append("234234");
        
        System.out.println(builder.toString());
        
        //Cach 3
        StringBuffer buffer = new StringBuffer();
        buffer.append("234234");
        buffer.append("234234");
        buffer.append("234234");
        buffer.append("234234");
        buffer.append("234234");
        
        System.out.println(buffer.toString());
    }
}

#Test2.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.lesson01;

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 *
 * @author teacher
 */
public class Test2 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        
        System.out.println("Nhap s1 = ");
        String s1 = scan.nextLine();
        System.out.println("Nhap s2 = ");
        String s2 = scan.nextLine();
        
        Pattern p = Pattern.compile(s2);
        Matcher m = p.matcher(s1);
        
        while(m.find()) {
            System.out.println("finding > " + m.start());
        }
        
        //s1 -> Ton tai 1 String theo quy luat sau hay khong: [a-z]{2,3}[0-9]{3}[A-Z]{1-6}
        String s3 = "[a-z]{2,3}[0-9]{3}[A-Z]{1,6}";
        p = Pattern.compile(s3);
        m = p.matcher(s1);
        
        while(m.find()) {
            System.out.println("###finding > " + m.start() + " > " + m.group());
        }
    }
}

#Test3.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/Classes/Class.java to edit this template
 */
package com.gokisoft.lesson01;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.Map;
import java.util.Vector;

/**
 *
 * @author teacher
 */
public class Test3 {
    public static void main(String[] args) {
        //ArrayList > Mang String
        //Tao ra 1 mang rong elementData = {}
        ArrayList<String> list = new ArrayList<>();
        
        //Lan tao bo nho lan dau > mang rong 10 phan tu
        list.add("1");
        list.add("2");
        list.add("3");
        list.add("4");
        list.add("5");
        
        for (String s : list) {
            System.out.println(s);
        }
        //Tom tat: ArrayList -> tao 1 mang rong ->Them phan tu vao (Rong: 10 phan tu, lan sau -> tang theo cong thuc)
        
        //ArrayList > Mang String
        //Tao ra 1 mang gom 10 phan tu
        Vector<String> v2 = new Vector<>();
        
        //Lan tao bo nho lan dau > mang rong 10 phan tu
        v2.add("1");
        v2.add("2");
        v2.add("3");
        v2.add("4");
        v2.add("5");
        
        for (String s : v2) {
            System.out.println(s);
        }
        
        //LinkedList > Mang String
        LinkedList<String> v3 = new LinkedList<>();
        
        //Lan tao bo nho lan dau > mang rong 10 phan tu
        v3.add("1");
        v3.add("2");
        v3.add("3");
        v3.add("4");
        v3.add("5");
        
        for (String s : v3) {
            System.out.println(s);
        }
        
        //Map -> HashMap
        HashMap<String, Student> maps = new HashMap<>();
        Student std = new Student();
        std.input();
        maps.put("s1", std);
        
        std = new Student();
        std.input();
        maps.put("s2", std);
        
        std = maps.get("s1");
        std.display();
        
        for (Map.Entry<String, Student> entry : maps.entrySet()) {
            String key = entry.getKey();
            Student val = entry.getValue();
            
            System.out.println(key);
            val.display();
        }
    }
}