Java

Re: how to find 2nd largest array if array values like{10,20,92,81,92,34}

2-Nov-13 21:33

Probably by writing some code. See http://www.codeproject.com/Messages/3137511/Forum-Guidelines-PLEASE-READ.aspx[^].

Veni, vidi, abiit domum

SimpDev3-Nov-13 6:00

SimpDev

3-Nov-13 6:00

First looking for the largest number, after that you can put:

Java

if (larger == array[i]) continue;
else //you code here

looping it all and using the same algorithm, of course.

Re: how to find 2nd largest array if array values like{10,20,92,81,92,34}

anjim3-Nov-13 16:54

anjim

3-Nov-13 16:54

thanks dude

Override annotation member variable at runtime

Lash2031-Oct-13 3:45

Lash20

31-Oct-13 3:45

Hi all,

Java newbie here..

Is it possible to override/set the value of a member variable at runtime?

So for example, in the snippet below, how do I set fieldValue with the value of the data that is stored in fieldName?

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface MyField{



    String fieldName() default "";

    String fieldValue() default "";
}


@MyField(fieldName = "pageTitle")
public class Foobar {
    private String pageTitle;

    public String getPageTitle() {
        return pageTitle;
    }


    public void getPageTitle(String pageTitle) {
        this.pageTitle = pageTitle;
    }
}

Re: Override annotation member variable at runtime

lrinish2-Nov-13 13:59

lrinish

2-Nov-13 13:59

I think this answers your question, http://docs.oracle.com/javase/1.5.0/docs/guide/language/annotations.html[^]

Quote:
Once an annotation type is defined, you can use it to annotate declarations. An annotation is a special kind of modifier, and can be used anywhere that other modifiers (such as public, static, or final) can be used. By convention, annotations precede other modifiers. Annotations consist of an at-sign (@) followed by an annotation type and a parenthesized list of element-value pairs. The values must be compile-time constants.

Personally never used annotations for anything other than generating Java Docs and I'm not sure what your trying to use it for here? Are you really trying to define an interface?

Re: Override annotation member variable at runtime

Lash207-Nov-13 8:25

Lash20

7-Nov-13 8:25

Thanks, I'll take a look at the link. Per your question, I'm using annotations to for custom validation.

Re: Override annotation member variable at runtime

jschell7-Nov-13 9:22

jschell

7-Nov-13 9:22

Annotations can be processed to produce code in various ways. The code of course would exist at run time.

If you are using an existing annotation processing system then what ever it does is what you can do, and you would look at the docs for that.

If your writing your own then add the functionality to keep track of it.

Rising error in Constructor-based Dependency Injection, Spring Framework

kmb8930-Oct-13 15:44

kmb89

30-Oct-13 15:44

Hi everyone,
I am a beginner in Spring framework. I am learning about Spring Dependency Injection from [Dependency Injection]. My project have been written according to above tutorial. But there is an error when I run my project.

If anyone know about my problem, plz point me.
here is my project file linke : [My Spring Project]

the followings are the library I used in my project :
antlr-4.1-complete
commons-logging-1.1.3
spring-aop-3.2.4.RELEASE
spring-asm-3.1.4.RELEASE
spring-aspects-3.2.4.RELEASE
spring-beans-3.2.4.RELEASE
spring-context-3.2.4.RELEASE
spring-context-support-3.2.4.RELEASE
spring-core-3.2.4.RELEASE
spring-expression-3.2.4.RELEASE

Best Regards
Kaung Myat

Re: Rising error in Constructor-based Dependency Injection, Spring Framework

Richard MacCutchan30-Oct-13 22:05

Re: Rising error in Constructor-based Dependency Injection, Spring Framework

30-Oct-13 22:05

No one is going to download your code and try to debug it for you. Please edit your question and add a proper explanation of your problem.

Veni, vidi, abiit domum

Bernhard Hiller31-Oct-13 1:31

Bernhard Hiller

31-Oct-13 1:31

kmb89 wrote:
there is an error

And the error message is: ? And the lines of code around the place where it happens?

JSpinner value from Database.

chdboy27-Oct-13 2:31

Re: JSpinner value from Database.

27-Oct-13 2:31

I have this code which saves the value into database from JSpinner

Java

SpinnerListModel monthModel = new SpinnerListModel();
String[] monthStrings = {"1Month","3Month","6Month","1Year"}; //get month names
	         monthModel = new SpinnerListModel(monthStrings);
	        JSpinner spinner = new JSpinner(monthModel);
statement.setString(28,(String)monthModel.getValue().toString().toUpperCase());

But how to get that value back for Editing?

I tried

Java

spinner.setText((String)monthModel.getValue(),29);

But it says

Java

The method setText(String, int) is undefined for the type JSpinner

How do I get the values from Database?again to JSpinner.

jschell30-Oct-13 8:18

jschell

30-Oct-13 8:18

You should have a database layer. It should NOT have any gui code in it.
It provides a public API that allows an external caller to interact with the layer.
The layer interacts with the database.

That public API would have a method/class that would represent "save interval" and "get interval" where the 'interval' values represent '1 month', '3 Months', '6 months' (and note that I am NOT saying to store "1 month" as a value.)

The 'save' method uses a database insert or perhaps update statement. And the 'get' uses a database query statement.

You code that and test it.

After you do that THEN your gui code, specifically the JSpinner uses the two methods.

public and private RSA keys

Beulah Dalrymple25-Oct-13 11:41

Beulah Dalrymple

25-Oct-13 11:41

Can anyone guide me how to write code to generate public and private keys using RSA algorithm, using your own functions? In other words, not using BigInteger etc. This seems impossible and I have a deadline of 31 October, 2013.

Re: public and private RSA keys

Richard MacCutchan25-Oct-13 22:58

Try https://www.google.com/search?q=generate+public+and+private+keys+using+RSA+algorithm[^].

25-Oct-13 22:58

Veni, vidi, abiit domum

Navigationa with ResultSet

chdboy24-Oct-13 21:55

Re: Navigationa with ResultSet

24-Oct-13 21:55

I'm not able to move forward with the ResultSet with this code on "next Button".

Here is the code

Java

public void nextrecord()
	{
		
		Statement stmt = null;
	    String query = "select * from Employer";
	    try {
	    	
	        stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);	        
	         rs = stmt.executeQuery(query);
	        
	         if(rs.isBeforeFirst());
	         {
	         while(rs.next())
	         {
			
	        firstNameTextField.setText(rs.getString(2));
        	lastNameTextField.setText(rs.getString(3));
        	addressTextField.setText(rs.getString(4));
        	
		
	         }
	         
	}
	         
	    }
	    catch (SQLException e )
        {
            e.printStackTrace();
        }
	    
	    }

The problem is when I click on the next button ,it takes me to the last record and skips all the records ,I wanted to go through all the records one by one ,clicking each record one by one.
There is one record present in the text fields before pressing next button.

Nagy Vilmos24-Oct-13 22:41

Nagy Vilmos

24-Oct-13 22:41

Separate your actions...

0. Method to query the data, then store the record set.
1. Method to display a record.

Something like [untested code]

Java

class Hatstand
  extends Stuff
{
  private RecordSet recordSet;
  // need to initialise & stuff.

  /**
   * Query the data
   */
  private void submitQuery()
  {
    Statement stmt = null;
    String query = "select * from Employer";
    try
    {
       stmt = con.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);	        
       this.recordSet = stmt.executeQuery(query);
    } 
    catch (SQLException e )
    {
       // message box'd be better
       e.printStackTrace();
       this.recordSet = null;
    }
    finally
    {
      setRecord(true);
    }
  }

  /**
   * Set the displayed record
   * called after query and by next/previous buttons.
   */
  private void setRecord(boolean forward)
  {
    // set the record:
    boolean isNull = true;
    if (this.RecordSet != null)
    {
      if (forward && !this.RecordSet.isLast())
      {
        this.RecordSet.next();
        isNull = false;
      }
      else if (!forward && !this.RecordSet.isFirst())
      {
        this.RecordSet.previous();
        isNull = false;
      }
    }

    if (isNull)
    {
      firstNameTextField.setText(null);
      lastNameTextField.setText(null);
      addressTextField.setText(null);    }
    }
    else
    {
      firstNameTextField.setText(rs.getString(2));
      lastNameTextField.setText(rs.getString(3));
      addressTextField.setText(rs.getString(4));    }
    }
  }
}

speramus in juniperus

Re: Navigationa with ResultSet

chdboy26-Oct-13 20:57

Putting a split String in a printout.

26-Oct-13 20:57

Thanks for the Idea. Smile | :)

chdboy23-Oct-13 19:58

23-Oct-13 19:58

I have a String which has been splitted like this

Java

String companyinforstring ="Company name.:Company profile no 1.:Company profile no 2.:Company profile no3.:---------------------------------------------------------------:Company address, :Street number, :Area,Area no2, :City. ";
for (String retval: companyinforstring.split(":"))
{
System.out.println(retval);
graphics.drawString(retval.toUpperCase(), 250, 200);
}

The Problem is that String which has been splitted, overlaping each String,How can this be solved?

Richard MacCutchan23-Oct-13 21:30

23-Oct-13 21:30

Java

graphics.drawString(retval.toUpperCase(), 250, 200);

You are drawing every line at the same point.

Veni, vidi, abiit domum

chdboy23-Oct-13 23:16

23-Oct-13 23:16

Java

String[] str1 = companyinforstring.split(":");
		for(int i=0;i<str1.length;i++)
        {
            //System.out.println("Split1 Element "+i+" :"+str1[i]);
            graphics.drawString(str1[0].toUpperCase(), 360, 50);
            graphics.drawString(str1[1].toUpperCase(), 360, 60);
            graphics.drawString(str1[2].toUpperCase(), 360, 70);
            graphics.drawString(str1[3].toUpperCase(), 360, 80);
            graphics.drawString(str1[4].toUpperCase(), 360, 90);
            graphics.drawString(str1[5].toUpperCase(), 360, 100);
            graphics.drawString(str1[6].toUpperCase(), 360, 110);
            graphics.drawString(str1[7].toUpperCase(), 360, 120);
            graphics.drawString(str1[8].toUpperCase(), 360, 130);
        }

Is there any simple way of doing it?
Please let me know

Richard MacCutchan23-Oct-13 23:23

23-Oct-13 23:23

chdboy wrote:
Is there any simple way of doing it?

Of course, use a loop, something like:

Java

int lineHeight = 10;
int currentLine = 50;
for (String strText: companyinforstring.split(":"))
{
    graphics.drawString(strText.toUpperCase(), 360, currentLine);
    currentLine += lineHeight;
}

Veni, vidi, abiit domum

chdboy24-Oct-13 0:53

24-Oct-13 0:53

thanks a lot Smile | :)

applets

Member 1035631323-Oct-13 18:28

Member 10356313

23-Oct-13 18:28

Using applets i create one text editor in there when they enter maximum words cursor should go to the new page this is my issue . so if any know know how to overcome this problem pls help me out.

Thanks and Regards.
Naveenkrishna

Re: applets

Richard MacCutchan23-Oct-13 21:28