Java

Re: accessing elements in java arrays

12-Apr-16 10:22

Please do not crosspost; I already gave you the answer in QA.

Richard MacCutchan12-Apr-16 10:23

Re: accessing elements in java arrays

12-Apr-16 10:23

Also, please do not create multiple identities to post the same questions.

Patrice T12-Apr-16 10:34

Patrice T

12-Apr-16 10:34

Advice: read seriously the documentation and follow tutorials.
you can't learn a language by asking every time you try something fancy and wonder why it don't work.

Patrice

“Everything should be made as simple as possible, but no simpler.” Albert Einstein

java assignment

Member 1244926010-Apr-16 2:20

Member 12449260

10-Apr-16 2:20

1. As a programmer you are tasked with a presentation to a group of investors to demonstrate how arrays (2D and Multi-dimensions) can be used in Real Time Systems. (20)
2. Name five tools from the JDK and explain what they are used for. Show a typical invocation for each of the four tools. (20)
3. If a VW GTi vehicle costs R. 119,995 or less, you receive a R. 1,000 discount and the finance charge is 5% per year. If the vehicle costs more, there is no discount but the finance charge is only 4% per year. In either case you have to pay off 10% of the original cost of the vehicle per year. Write a program and an application to convert between the cost of the vehicle and what you still owe exactly one year later. (10)
4. Suppose you are a software engineer working for South Africa Defense Force (SADF) , and you
have been asked to code a simple countdown timer that will be installed at new nuclear missile launch sites. Your timer should count down from 15 seconds to zero, update every 72 milliseconds, and display hundredths of a second.
4.1 Define the following class constants to specify the parameters of your timer:
o Start Time: the start time for your timer, set as 10,000 milliseconds.
o Unit Time: the time interval between each update, set as 72 milliseconds. (20)
4.2 Create a GLabel with font Segoe UI to display how much time is left on your timer, which can appear anywhere on the console window as long as all the digits are clearly visible. If 05:09 milliseconds are left, your timer should read 5:09 as shown above instead of 05: 09.

OriginalGriff10-Apr-16 2:21

OriginalGriff

10-Apr-16 2:21

We do not do your homework: it is set for a reason. It is there so that you think about what you have been told, and try to understand it. It is also there so that your tutor can identify areas where you are weak, and focus more attention on remedial action.

Try it yourself, you may find it is not as difficult as you think!

If you meet a specific problem, then please ask about that and we will do our best to help. But we aren't going to do it all for you!

Bad command or file name. Bad, bad command! Sit! Stay! Staaaay...

Member 1245506112-Apr-16 9:58

Member 12455061

12-Apr-16 9:58

Sorry not an assignment working on a small work project
I'm the only one in the group willing to learn java

Richard MacCutchan12-Apr-16 10:02

12-Apr-16 10:02

Well I am sorry, but we are still not going to do your work for you.

Member 1245506112-Apr-16 10:04

Member 12455061

12-Apr-16 10:04

can u refer me to a good web site

Richard MacCutchan12-Apr-16 10:21

12-Apr-16 10:21

www.google.com[^].

Member 1245506112-Apr-16 10:03

Member 12455061

12-Apr-16 10:03

OK specific question
how get elements from an array like this
array[1] = 3, 4, 5
now
get array[1]. first element which is equal to 3

Richard MacCutchan12-Apr-16 10:20

How to restore mysql database in java

12-Apr-16 10:20

No it is not. Go to The Java Tutorials[^] and learn the language.

Noorullah Noori8-Apr-16 21:07

Noorullah Noori

8-Apr-16 21:07

i want to restore a backup file created by mysqldump but it doesn't respond and not restoring the file here is my command.

Process runtime = Runtime.getRuntime().exec("mysql -u root mysqlsarafi< C:\\xampp\\htdocs\\backup.sql");
					JOptionPane.showMessageDialog(null, "Done");
					int complete = runtime.waitFor();
					JOptionPane.showMessageDialog(null, complete);
					if(complete ==0){
						JOptionPane.showMessageDialog(null, "Succed");
					}
					else{
						JOptionPane.showMessageDialog(null, "not succed");
					}

Richard MacCutchan8-Apr-16 22:20

8-Apr-16 22:20

What does happen?

Noorullah Noori9-Apr-16 0:58

Noorullah Noori

9-Apr-16 0:58

nothing and the application from which i am restoring database also not closing.

Richard MacCutchan9-Apr-16 2:18

9-Apr-16 2:18

Java

Process runtime = Runtime.getRuntime().exec("mysql -u root mysqlsarafi< C:\\xampp\\htdocs\\backup.sql");

The above command line will not work. You cannot use redirection (<) in generated processes, it is only valid when running commands in the shell or command prompt.

Noorullah Noori9-Apr-16 21:41

Noorullah Noori

9-Apr-16 21:41

so then what to do now.

Richard MacCutchan10-Apr-16 1:52

Re: Laying out - Please help

10-Apr-16 1:52

Check the mysql documentation to see if there is another way to specify the file.

Laying out - Please help

Ashford Tulgaa3-Apr-16 23:13

Ashford Tulgaa

3-Apr-16 23:13

Hello, i'm new to Java and i'm trying to learn the basics. Problem is i want to make this buttons top to bottom, Tried some but kinda confused here. Please help

Here is my code

JPanel mainPannel = new JPanel();
JButton jbt1 = new JButton("Шинээр үүсгэх");
JButton jbt2 = new JButton("Хугацаа сунгах");
JButton jbt3 = new JButton("Данс хаах");
JButton jbt4 = new JButton("Архив");
JButton jbt5 = new JButton("Прогрaмыг хаах");
mainPannel.add(jbt1);
mainPannel.add(jbt2);
mainPannel.add(jbt3);
mainPannel.add(jbt4);
mainPannel.add(jbt5);
mainPannel.setBorder(new TitledBorder("Үндсэн Цэс"));

//Create font and a line border
Font largeFont = new Font("ArialMon", Font.BOLD, 20);
Border lineBorder = new LineBorder(Color.BLACK, 2);
//Add panel to mainFrame
JPanel listPane = new JPanel();
listPane.setLayout(new BoxLayout(listPane, BoxLayout.Y_AXIS));
listPane.add(mainPannel);

modified 4-Apr-16 5:22am.

Richard MacCutchan4-Apr-16 4:19

How to customise a JButton`s button

4-Apr-16 4:19

You forgot to tell us what the problem is.

KrReyes31-Mar-16 7:15

KrReyes

31-Mar-16 7:15

I know how to do a JButton, but the thing is, I don't want that to say Play, Quit, etc.. I want to customise it, like say in Minecraft, where the Singleplayer button is on a stone; or in Papers, please, the button for Story Mode is underlined with dots. You know what I mean.

I've tried searching around the internet, but all they show is the JButton code, not how to customise. Sigh | :sigh:

Re: How to customise a JButton`s button

Patrice T31-Mar-16 7:51

Patrice T

31-Mar-16 7:51

Already posted in QA

Patrice

“Everything should be made as simple as possible, but no simpler.” Albert Einstein

width netbeans IDE JLabel fullscreen problem?

Sadikacar6030-Mar-16 6:00

Sadikacar60

30-Mar-16 6:00

not the label fullscreen*

    private void formWindowOpened(java.awt.event.WindowEvent evt) {                                  
        Toolkit tk = Toolkit.getDefaultToolkit(); 
        Dimension screenSize = tk.getScreenSize(); 
        this.setSize(screenSize); 			
				
        int Ewidth=tk.getScreenSize().width;				
        int Eheight=tk.getScreenSize().height;				
        
        //picture resize ???
        jLabel1.setBounds(0, 0, Ewidth, Eheight);  //dont' work 
        jLabel1.setSize(screenSize);  //dont' work
        jLabel1.setSize(100, 500);//dont' work
        jLabel1.setPreferredSize(new Dimension(Ewidth, Eheight));//dont' work
        jLabel1.setMaximumSize(new Dimension(100, 500)); //dont' work
        
        
//        jPanel1.setPreferredSize(new Dimension(Ewidth, Eheight));// work
//        jPanel1.setBackground(Color.red); //work
        

    }

Java- Multi-threading server with netbeans

Member 1162036225-Mar-16 4:23

Member 11620362

25-Mar-16 4:23

How to connecte multiclient (only number port and adress IP) to one server with number client online? who can help me!!plz Confused | :confused:

Re: Java- Multi-threading server with netbeans

Richard MacCutchan25-Mar-16 5:38