Java danuma bedaganna kamathi aya innawada?

h_abeysinghe · Feb 27, 2011

kavindaprabhath said:
thanks machan. api mehema karamu. oyata upload karanna pluwan notes upload karala link eka post karanna. ewa uwamana wena than waladi mama ewa dannam. naththam me thread eke danna puluwan puluwan than walata kelinma oya post karnna..................

ela ela man ehema karanam :cool:

h_abeysinghe · Feb 27, 2011

menna danata man laga tiyeana files

mewa kelinma skul eken dena ewa

files hamabba wuna gaman danam

rehrumesh · Feb 27, 2011

This is going great machanla....

sujhansi · Feb 27, 2011

kavindaprabhath · Feb 27, 2011

h_abeysinghe said:
menna danata man laga tiyeana files
mewa kelinma skul eken dena ewa
files hamabba wuna gaman danam
[/URL]

ela machan...
thanks..
ubla wage eun thamai apita oni...

Mal Baba · Feb 27, 2011

Elakiri Kollo Path Eka Set Kala

kavindaprabhath · Feb 27, 2011

Mal Baba said:
Elakiri Kollo Path Eka Set Kala

Javac gahala baluwada java compiler sanipen innawada kiyala?
:lol:

dan ithin coding thamai...
coding karana gaman anith theory kiyannam.

amila325 · Feb 27, 2011

kavindaprabhath said:
මම කලින් ඔයාලට කියල දුන්නා Java compiler ඉන්න path එක set කරගන්න හැටි. ඒත් ඔයාලා command prompt එක close කරලා ආයිත් command prompt එකට ගිහින් javac කියල type කරලා බැලුවොත් ඔයාලට පෙනේවි machine එකට Java compiler හොයගන්න බැහැයි කියල message එකක් දෙනවා.

දැන් මොකද කරන්නෙ??
අපි machine එක shutdown කරලා ආයිත් login වෙන වාරයක් පාසා අපිට Java path set කරන්න වේවිද?

එහෙම කරන්න ඕනි නැහැ.
මම මේ කියන විදිහට Java වල path එක Windows වල System variable එකක් විදිහට set කලාම Windows start වෙද්දිම Java compiler ඉන්න තැන windows දැන ගන්නවා.

මෙන්න පිළිවෙල :-

1. System Properties වලට පිවිසීමට Windows key + Pause Break key එකවර press කරන්න. නැතිනම් My Computer මත rigth click කර Properties වලට පිවිසෙන්න.
View attachment 25226

2. එයින් Advanced Tab එක Select කරන්න.
3. Environment Variables button එක click කරන්න.
View attachment 25227

4. එවිට ලැබෙන window එකෙහි System variables තුල Path Select කර, Edit click කරන්න.
View attachment 25228

5. එවිට Edit System Variable window එක open වේවි. එය තුල දැනට ඇති කිසිවක් වෙනස් නොකරන්න.
6. දැන් මෙම code කොටස Variable value කියන කොටසේ අවසානයෙන් type කරගෙන OK කරන්න. නැවතත් OK , නැවතත් OK.

Code:

[B][SIZE="4"][COLOR="Red"]C:\Program Files\Java\jdk1.6.0\bin[/COLOR][/SIZE][/B]

View attachment 25229

** මෙම ක්‍රියා පිලිවෙල කිරීමේදි ඔබ අතින් යම් වරදක් සිදු වුයේනම් සියල්ලම cancel කර, නැවත මුල සිට පිලිවෙලින් කරන්න.

Gud one man meka tawa tikak tweak karannam.
System variables yatathe new kiyana eka obala eke ena box eke
variable name ekata JAVA_HOME kiyala denna
variable value ekata java(jdk) install karapu folder eka denna
ex. hithanna java install kare C:\Program Files\Java\jdk1.6.0 (1.6.0 kiyana eka oyala install karana version aka anuwa change wenawa denata nam 1.6.0_24 man hitanne)onna othana kiyala then
variable name ekata C:\Program Files\Java\jdk1.6.0 kiyala type karala ok karanna

eta passe path variable eka hoyagena eke ";C:\Program Files\Java\jdk1.6.0\bin" kiyana eka thiyenawanam eka ain karala ;%JAVA_HOME%\bin kiyala dunna nam hari

nrmly oyalata JAVA_HOME eka set karanna ona wena welawal thiyenawa so eka mulinma karala thibbanam mara lesi

...
so JAVA_HOME eka set karama ithin path ekath oya widiyata set karana eka hodai

amilabanuka · Feb 27, 2011

amila325 said:
Gud one man meka tawa tikak tweak karannam.
System variables yatathe new kiyana eka obala eke ena box eke
variable name ekata JAVA_HOME kiyala denna
variable value ekata java(jdk) install karapu folder eka denna
ex. hithanna java install kare C:\Program Files\Java\jdk1.6.0 (1.6.0 kiyana eka oyala install karana version aka anuwa change wenawa denata nam 1.6.0_24 man hitanne)onna othana kiyala then
variable name ekata C:\Program Files\Java\jdk1.6.0 kiyala type karala ok karanna

eta passe path variable eka hoyagena eke ";C:\Program Files\Java\jdk1.6.0\bin" kiyana eka thiyenawanam eka ain karala ;%JAVA_HOME%\bin kiyala dunna nam hari

nrmly oyalata JAVA_HOME eka set karanna ona wena welawal thiyenawa so eka mulinma karala thibbanam mara lesi ...
so JAVA_HOME eka set karama ithin path ekath oya widiyata set karana eka hodai

This approach is much better since some Java based tools depend on these variables. Eg: Tomcat

amila325 · Feb 27, 2011

amilabanuka said:
This approach is much better since some Java based tools depend on these variables. Eg: Tomcat

yeap that's it...
i use same approach to maven too

...

maxsa · Feb 28, 2011

java Tip: 01

ජාවා ගැන ගොඩක් හොද පොස්ට් දාල තිබ්බ කට්ටිය. maxsa !!!!

කට්ටිය ගොඩක් use කරන්නේ පත් එක දිගේ ගිහින් .java file එක compile කරන්න ක්‍රමය
(C:\User\Desktop\java\javaGUI ... etc). මම පොඩ්ඩක් sine එක easy කරලා දෙන්නම්.

මුලින්ම Desktop එකේ JAVA කියල Folder එකක් හදාගන්න (ඔයගොල්ලන්ට ලේසි place එකක).

ඊට පස්සේ ඔය පින්තුර වල තියෙන විදිහට
All programs > Accessories > Command Prompt Right Click කරලා ගිහිල්ලා cmd.exe එක copy past කරලා දාගන්න අර අපි හදාගත්ත JAVA Folder එක ඇතුලට.

ඊළගට අර Copy Past කරපු cmd.exe double click කරලා බලන්න පත් එක ඔයගොල්ලන්ගේ Folder එකට සෙට් වෙලා ඇති. දැන් cmd එකේ ගහන්න ඕනේ java File name එක විතරයි (> javac A.java ). වැඩි esay ne da ????

NOTE: cmd.exe එක copy past කරන්න කලින් අර
Environment variable eka ගිහින් එක සෙට් කරගන්න. එක old පොස්ට් වල තිබ්බ නිසා මම දාන්නේ නැහැ.

post eki aulaak thiyenawaa nam kiyana .. mage first post eka .. :nerd:

penirasa · Feb 28, 2011

ela!!!

rehrumesh · Mar 3, 2011

maxsa said:
ජාවා ගැන ගොඩක් හොද පොස්ට් දාල තිබ්බ කට්ටිය. maxsa !!!!

කට්ටිය ගොඩක් use කරන්නේ පත් එක දිගේ ගිහින් .java file එක compile කරන්න ක්‍රමය
(C:\User\Desktop\java\javaGUI ... etc). මම පොඩ්ඩක් sine එක easy කරලා දෙන්නම්.

මුලින්ම Desktop එකේ JAVA කියල Folder එකක් හදාගන්න (ඔයගොල්ලන්ට ලේසි place එකක).

ඊට පස්සේ ඔය පින්තුර වල තියෙන විදිහට
All programs > Accessories > Command Prompt Right Click කරලා ගිහිල්ලා cmd.exe එක copy past කරලා දාගන්න අර අපි හදාගත්ත JAVA Folder එක ඇතුලට.

View attachment 25276

View attachment 25277

View attachment 25278

View attachment 25279

View attachment 25280

ඊළගට අර Copy Past කරපු cmd.exe double click කරලා බලන්න පත් එක ඔයගොල්ලන්ගේ Folder එකට සෙට් වෙලා ඇති. දැන් cmd එකේ ගහන්න ඕනේ java File name එක විතරයි (> javac A.java ). වැඩි esay ne da ????

NOTE: cmd.exe එක copy past කරන්න කලින් අර
Environment variable eka ගිහින් එක සෙට් කරගන්න. එක old පොස්ට් වල තිබ්බ නිසා මම දාන්නේ නැහැ.

post eki aulaak thiyenawaa nam kiyana .. mage first post eka ..

Maxxa macho... great...

h_abeysinghe · Mar 5, 2011

menna aluth ewa

decision making

4Shared.com Links
1-if.doc
2-Boolean_operators.doc
3-FileIO.doc
4-switch.doc

MEDIAFIRE

1.IF statement
2.Boolean operators
3.FileIO
4.Switch

me tiyene apita dunna project ekak

meke karana tiyeana eka me word file eke athi

4shared.com=PointOfSaleApplication.doc
Mediafire=PointOfSaleApp.doc

me tiyene man okata hadapu eka

4Shared.com = PointOfSale.java
MEDIAFIRE=PointOfSale.java

katiya aran balana ko

man wath oke samahara ewa balala nae

hamba una gaman damme

h_abeysinghe · Mar 5, 2011

me tiyene man danata karapu podi programs

4shared.com links

MyASCIIArt.java
MathCalc.java
Grocceries.java
Examples.java
MultiplyThree.java
FourNumbers.java
InchToCm.java
ReverseNames.java
Pythagorean.java
Spending.java
StudentTests.java

MEDIAFIRE links
Example
FourNumbers
Groceries
InchToCm
MathCalc
MultiplyThree
ASCIIArt
Pythogorean
ReverseNames
Spendingapp
StudentTest

rehrumesh · Mar 5, 2011

h_abeysinghe said:
me tiyene man danata karapu podi programs

MyASCIIArt.java
MathCalc.java
Grocceries.java
Examples.java
MultiplyThree.java
FourNumbers.java
InchToCm.java
ReverseNames.java
Pythagorean.java
Spending.java
StudentTests.java

Elazzz elaazzz

mchn loku file upload karanawanam mediafire use karamuda??? no waitin stuf to dload.. so easy... anyways thnxx for dees,,,,

h_abeysinghe · Mar 5, 2011

rehrumesh said:
Elazzz elaazzz

mchn loku file upload karanawanam mediafire use karamuda??? no waitin stuf to dload.. so easy... anyways thnxx for dees,,,,

ah ela ela
UPDATED

h_abeysinghe · Mar 6, 2011

menna katiyata podi Quiz ekak

meka ape skul eke dunna 1st basic Quiz eka

onna patan gannwa

isselama MCQ 10k tiyenwa
4k writing tiyenwa

total marks=21
balanako serama karala kiyak tiyeda kiyala, :yes:

mama nam 21/21 gattha

me post eke MCQ dala anith eke writen question 4 danam

MCQ
1.Which is another name for package?
a. object
b. library
c. method
d. string

2.Which is a set of guidelines for writing an application?
a. algorithm
b. code conventions
c. comments
d. class

3.Which statement displays Hello, world! on the screen?
a. System.out.println("Hello, world!");
b. system.println("Hello, world!");
c. System.println('Hello, world!');
d. System.out.println('Hello, world!');

4.Which is used to enclose single or multiline comments?
a. \* *\
b. /* */
c. // //
d. \\ \\

5.What effect does \n have when included in an output string?
a. A \n is displayed in the output.
b. A N is displayed in the output.
c. A tab (8 spaces) is displayed in the output.
d. Output is moved to the next line.

6.What effect does \t have when included in an output string?
a. A \t is displayed in the output.
b. Output is moved to the next line.
c. A T is displayed in the output.
d. A tab (8 spaces) is displayed in the output.

7.The main() method is defined as
a. public static void main(string[] args)
b. public static void Main(String[] args)
c. public static void main(String[] args)
d. public static main(String[] args)

8.Which describes the output displayed by the statement:
System.out.format("%-10s %10s %8s", "Item", "Quantity", "Cost\n");
a. Item,Quantity, and Cost will be left aligned.
b. Item will be left aligned, Quantity and Cost will be right aligned.
c. Item, Quantity, and Cost will be right aligned.
d. Item will be right aligned, Quantity and Cost will be left aligned.

9.What does the following symbol indicate in a flow chart?

a. Process
b. Start or End
c. Input or Output
d. Selection

10.What does the following symbol indicate in a flow chart?

a. Start or End
b. Process
c. Selection
d. Input or Output

h_abeysinghe · Mar 6, 2011

WRITTEN QUESTIONS

11.List TWO code conventions associated with comments.

12.List ONE code convention related to indentation.

13.Identify FOUR violations of Code Conventions in the above application.

Code:

/**
 * PrintInternetRules.java
 * Name: WongPuter
 * Description: Displays student rules for accessing the Internet.
/*

public class PrintInternetRules
  public static void main(String[] args) {
    System.out.println("Internet Rules\n");
      System.out.println("1. Use school issued login and password.");
      System.out.println("2. Do not download any files.")
      system.out.println("3. Do not reveal personal information.");
  }
}

14.Identify FOUR errors in the above application.

Code:

/**
 * PrintInternetRules.java
 * Description: Displays student rules for accessing the Internet.
/*

public class PrintInternetRules
  public static void main(String[] args) {
    System.out.println("Internet Rules\n");
      System.out.println("1. Use school issued login and password.");
      System.out.println("2. Do not download any files.")
      system.out.println("3. Do not reveal personal information.");
  }
}

h_abeysinghe · Mar 6, 2011

ANSWERS and Marks for each MCQ

1.Which is another name for package?
Marks: 1.0
a. object

b. library

c. method

d. string

2.Which is a set of guidelines for writing an application?
Marks: 1.0
a. algorithm

b. code conventions

c. comments

d. class

3.Which statement displays Hello, world! on the screen?
Marks: 1.0
a. System.out.println("Hello, world!");

b. system.println("Hello, world!");

c. System.println('Hello, world!');

d. System.out.println('Hello, world!');

4.Which is used to enclose single or multiline comments?
Marks: 1.0
a. \* *\

b. /* */

c. // //

d. \\ \\

5.What effect does \n have when included in an output string?
Marks: 1.0
a. A \n is displayed in the output.

b. A N is displayed in the output.

c. A tab (8 spaces) is displayed in the output.

d. Output is moved to the next line.

6.What effect does \t have when included in an output string?
Marks: 1.0
a. A \t is displayed in the output.

b. Output is moved to the next line.

c. A T is displayed in the output.

d. A tab (8 spaces) is displayed in the output.

7.The main() method is defined as
Marks: 1.0
a. public static void main(string[] args)

b. public static void Main(String[] args)

c. public static void main(String[] args)

d. public static main(String[] args)

8.Which describes the output displayed by the statement:
Marks: 1.0
System.out.format("%-10s %10s %8s", "Item", "Quantity", "Cost\n");
a. Item,Quantity, and Cost will be left aligned.

b. Item will be left aligned, Quantity and Cost will be right aligned.

c. Item, Quantity, and Cost will be right aligned.

d. Item will be right aligned, Quantity and Cost will be left aligned.

9.What does the following symbol indicate in a flow chart?
Marks: 1.0

a. Process

b. Start or End

c. Input or Output

d. Selection

10.What does the following symbol indicate in a flow chart?
Marks: 1.0

a. Start or End

b. Process

c. Selection

d. Input or Output

Java danuma bedaganna kamathi aya innawada?

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Well-known member

Well-known member

Well-known member

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