Java 中英文術語對照

control variable - 控制變數
condition - 條件

infinite loop - 無窮迴圈
for loop - for 迴圈
while loop - while 迴圈

expression -  運算式
operand - 運算元
operator - 運算子

declare - 宣告
identifier - 識別字
statement - 陳述
local variable - 區域變數
method invocation - 方法呼叫

class - 類別
field - 屬性
constructor - 建構子
method - 方法
string - 字串

variable - 變數
object - 物件
literal - 字面常數
subclass - 子類別
superclass - 父類別

boolean value - 布林值
integer - 整數
inherit - 繼承
inheritance - 繼承
thread - 執行緒

Java basic data types, objects

資料型態 Data Type (8)

關鍵字 (keyword) ----- 型態類型 (type) ----- 位元數 (bits) ==> Example

byte ----- 整數 ----- (8bits)
short ----- 整數 ----- (16bits)
int ----- 整數 ----- (32bits) ==> int a = 2;
long ----- 整數 ----- (64bits)

float ----- 浮點數 ----- (32bits)
double ----- 浮點數 ----- (64bits) ==> double a = 2.0;
boolean ----- 布林值 ---- (1bit) ==> boolean a = trun;
char ----- 字元 ---- (16bits) ==> char a = '2';


物件 Object (11)

回傳型態 (return types) ---- 名稱 (name) ----- 功能 (feature)

Object ----- o.clone() ----- 複製回傳 o 本身的拷貝
boolean ----- o.equals(Object obj) ------ 判斷 obj 是否與 o 相同
void ------ o.finalize() ----- 呼叫資源回收者檢查此物件是否應該被回收
Class<?> ----- o.getClass() ----- 回傳類別名稱
int ----- o.hashCode() ----- 回傳物件的雜湊碼
void ----- o.notify() ----- 喚醒等待中的單一執行緒 (thread)
void ----- o.notifyAll() ----- 喚醒等待中的所有執行緒
String ----- o.toString() ----- 回傳物件的字串表達形式
void ----- o.wait() ----- 使 o 的執行緒進行等待
void ----- o.wait(long timeout) ----- 使 o 的執行緒進行等待
void ----- o.wait(long timeout, int nanos) ----- 使 o 的執行緒進行等待

JAVA 的存取修飾元

[修飾元] - [權限]

public - 皆可存取
private - 在相同的 class 才可以存取
default - 在相同的 package 的 class 才可以存取
protected - 在相同的 package 的 class 才可以存取. 不同的 package, 需有繼承關係才可.

Eclipse Text Searching

Search the text what you would like to show on workspace.

On menu bar, choose Search --> File to open the Search window.

Unassociate File Types in Windows 7

Purpose: 在 Win7 取消特定附檔名被預設程式開啟

Tool filename: Unassoc (v1.4)
Download from here: https://www.dropbox.com/s/z2pxitiru4md5uf/unassoc_1_4.zip

• This is a green software, do not need to to the installation.
• Just run "Unassoc.exe", and that operation UI shows up.

• Select the file type from the list
• Click " Delete file type ".
• The user-specific association for the chosen file type is now removed from the registry. The system will now use the global file association settings.

Eclipse Basically

Establish your first JAVA project within IDE Eclipse.

• Choose " File --> New --> Java project ".
• Fill " lu.ide.first " in Project name field.
• Make sure a option of " Create separate folders for sources and class file "is checked on Project layout.
• Press " Finish " button to create your first JAVA project.

Installing RXTX for Serial Communication with Java in MS platform.

01- Get RXTX from here.

• Filename: rxtx-2.1-7-bins-r2.zip
• Link: https://www.dropbox.com/s/gt061ayzxe4kaoi/rxtx-2.1-7-bins-r2.zip

02- Unzip that file, then you will see 3 files on following each path.

Path1: rxtx-2.1-7-bins-r2/Windows/i368-mingw32/

• rxtxParallel.dll 
• rxtxSerial.dll

Path2: rxtx-2.1-7-bins-r2/

• RXTXComm.jar

03- Copy there

2 files rxtxParallel.dll & rxtxSerial.dll to [ C:\Program Files\Java\jdk1.7.0_45\jre\bin ]

1 file RXTXComm.jar to [ C:\Program Files\Java\jdk1.7.0_45\jre\lib\ext\ ]

JAVA Programming Reference from Web

Serial Communication in JAVA with Example Program / Link

Ken Yang 筆記 / Link

Eclipse 簡介與教學 / Link

JAVA Example - Telnet Client

Required Library: apache.commons.net


========================================

import org.apache.commons.net.telnet.TelnetClient;

import java.io.InputStream;
import java.io.PrintStream;

public class AutomatedTelnetClient {
    private TelnetClient telnet = new TelnetClient();
    private InputStream in;
    private PrintStream out;
    private String prompt = "%";

Java - Input library of "apache.commons.net" to IDE Eclipse.

1-
由下面連結下載 "commons-net-3.3-bin.zip".
http://commons.apache.org/proper/commons-net/download_net.cgi

2-
解壓縮 commons-net-3.3-bin.zip

3-
Execute Eclipse --> create a new java project

4-
Left click on project --> Build Path --> Configure Build Path...
On Libraries tab --> Add External JARs...
Browse a file "commons-net-3.3.jar" where you put on.

5-
A Library "commons-net-3.3.jar" should listed on left side Project Explorer.