Displaying array from another method

Hello for this code I want to display the array from the first method in the second method although when I run it, it displays 6 times the whole array - well the the last iteration shows the whole array. I have only just started using different methods.
Please could someone say why this is happening.
Cheers
John
import java.util.*;
public class Lottery
     public static void main(String[] argStrings)
          int[] lotteryArray = new int[6];
          for(int count = 0; count < 6; count++)
               double randomNumber = Math.random();
               double biggerRandom = (randomNumber * 50);
               int integerNumber = (int)biggerRandom;
               lotteryArray[count] = integerNumber;
               displayNumbers(lotteryArray);
     public static void displayNumbers(int[] lotteryArray)
          System.out.println("Lottery numbers are:");
          for(int i = 0; i < lotteryArray.length; i++)
               System.out.print(lotteryArray[i] + " ");
          System.out.println();
}

Well I know your right but actualy getting this to work for my program is proving hard. This is my progress so far:
Cheers
John
public static void main(String[] argStrings)
          int[] lotteryArray = new int[6];
          int p = 0;
          boolean duplicate = false;
          while(p < 6)
               for(int count = 0; count < lotteryArray.length; count++)
                    double randomNumber = Math.random();
                    double biggerRandom = (randomNumber * 50);
                    int integerNumber = (int)biggerRandom;
                    if (lotteryArray == lotteryArray[count])
                         duplicate = true;
                    if (duplicate == false) //not a duplicate
                         lotteryArray[++count] = integerNumber;
               displayNumbers(lotteryArray);
     }

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How do I access array elements in one method from another method?

Hi all!
How do I access the array's elements from another method so that method 2 can have access to method 1's array elements? Thanks for any help!
I am trying to create a simply program that will use a method to create an array and a SEPARATE method that will sort the array's elements (without using java's built in array features). I can create the program by simply having one method and sorting the array within that same method, BUT I want to sort the array from another method.
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Thanks for the help all! I ve managed to get the program working, using java's built in array sort, but when i try to call on the array sort method from WITHIN my main method, nothing happens!
Can somebody please tell me why I am not able to call on the sort method from within my main class???? Thanks!
public class ArraySort {
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       double myArray[] = new double[size]; //create new array
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       Arrays.sort(arrayName);      //sort array using Java's built in array method
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public static void main(String[] args) {
ArraySort newArray = new ArraySort(); //create a new instance
double myArray[] = new double[0]; //create a new double array
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How can I use my array in another method.... Or better yet, what's wrong?

I guess I'll show you what I am trying to do rather and then explain it
public class arraycalc
int[] dog;
public void arraycalc()
dog = new int[2];
public void setSize(int size)
dog[1] = size;
public int getSize()
return dog[1];
This gives me a null pointer exception...
How can I use my array from other methods?

You have to make the array static. :)
Although I must admit, this is rather bad usage. What you want to do is use an object constructor to make this class an object type, and then create the array in your main class using this type, and then call the methods from this class to modify your array. Creating the array inside the other method leads to a whole bunch of other stuff that's ... well, bad. :)
Another thing: Because you're creating your array inside this class and you want to call your array from another class, you need to make the array static; to make it static, you must make your methods static. And according to my most ingenious computer science teacher, STATIC METHODS SUCK. :D
So, if you want to stick with your layout, it would look like:
public class arraycalc
     static int[] dog;
     public static void arraycalc()
          dog = new int[2];
     public static void setSize(int size)
          dog[1] = size;
     public static int getSize()
          return dog[1];
}But I must warn you, that is absolutely horrible code, and you shouldn't use it. In fact, I don't even know why I posted it.
You should definitely read up on OOP, as this problem would be better solved by creating a new object type.

Passing Array to Another Method

Hello, I created a program with an array in one of the methods. I have been trying to figure out how to correctly pass the array to another method in the same class. I know my problem is in my method delcaration statements. Could someone please show me what I am doing wrong? Please let me know if you have any questions. Thanks for your help.
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Thank you jverd, I was able to get that to work for me.
I have another basic question about arrarys now. In all of the arrary examples I have seen, the array is populated all at once using a for statement like in my program.
userData = new Person[50];
for (int i = 0; i < userData.length; i++) In my program though, I want it to only fill the first array parameter and then go up to the main menu. If the user chooses to add another account, the next spot in the array will be used. Can someone point me in the right direction for doing this?

Call String from another method

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String arr[] = new String[1000];is this typing mistake????? because if u did it in
program as well i don think it will work.. the tag is
innnside array lenght... hope iam saying this right!!no, he had the bold form tags (b and /b inside square brackets) in his previous non-code tagged post. He carried it over to this post and they caused an error. I highly doubt that they were in his actual program. Just delete them.
Message was edited by:
petes1234

Using a variable from another method within another method

I have a couple methods. In the beginning of the class I declared the double variables. Then I have a method1 that in that class that changes those double variables. Then the last method2 runs, and is suppose to print information to the screen with the changed variable information all being called from another class. How do I get those changed double variables to be read in method2?

Sorry about all that, when I paste it in from the compiler it's skews it some, but hopefully this should be more readable
* Project Filename: Lab1s2
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Ok I have this little program that I created to display values stored in an array. Well, I want my array to automatically be populated with the same values that are in another array that resides in a different class. Here is my code for the class that I want the values to be displayed:
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Ok, thanks for your help. Now I have another problem. I can't get the values to display. Here is my code:
This is the program that runs the application:
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Hi
I'd appreciate it if anyone can help me with this please.
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The problem is:
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Message was edited by:
hellbinder

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/Cullum

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I have a string array with elements as follows:
   00 00 00 00 00 00 00 00
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Where 43 goes in the 3rd row fifth position
Where 4E goes in the 3rd row seventh position
Where 31 goes in the 4th row first position
Where 30 goes in the 4th row third position
Where 30 goes in the 4th row fifth position
Where 33 goes in the 4th row seventh position
Where 30 goes in the 5th row first position
Where 30 goes in the 5th row third position
Where 31 goes in the 5th row fifth position
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So the final array looks as follows:
   00 00 00 00 00 00 00 00
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Solved!
Go to Solution.
Attachments:
CMM_Add_SCAN_SN_2_PAT_DATA (temp).vi ‏13 KB

Try this
Omar
Message Edited by Omar II on 03-24-2010 03:25 PM
Omar
Attachments:
CMM_Add_SCAN_SN_2_PAT_DATA%20(temp)[1].vi ‏17 KB

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     double particle[];
try {
         for(i = 0; i < 10; i++)
          particle_sys[i*5] = 1;
          particle_sys[i*5 + 1] = 0;
          particle_sys[i*5 + 2] = 1;
          particle_sys[i*5 + 3] = 0;
          particle_sys[i*5 + 4] = 0;
     class call = new class();
     particle = call.MyFailingMethod(particle_sys);Now the code for the class which owns the method I call
public class Jfjni
     static
             System.loadLibrary("nativelibrary");
     public native void .........
     public double[] MyFailingMethod(double particle_sys[])
           double particle[] = new double[100*5];
           .... A call to a the native library to recibe the new data of particle_sys ....
         for(int i = 0; i < 10; i++)
          particle[i*5] = particle_sys[i*5];
          particle[i*5 + 1] = particle_sys[i*5 + 1];
          particle[i*5 + 2] = particle_sys[i*5 + 2];
          particle[i*5 + 3] = particle_sys[i*5 + 3];
          particle[i*5 + 4] = particle_sys[i*5 + 4];
          return particle;
}A function in the native code changes the "particle_sys" array, but the returning value stills the same as the original passed to the function.
Because of this, I have tested returning the array, dont works. I have tested also returning a copy of the array in "particle", dont works.
Over standalone app and applet it runs correctly in all different ways, when I try it over a servlet the values of the array stand the same as before the method call.
Please suggestions!
Edited by: bifiado on Jan 15, 2008 10:27 AM
Edited by: bifiado on Jan 15, 2008 10:28 AM

I have partially solutioned this mistake but I have collateral ones. Looks like I forgot to put in web.xml the definition of the class I was calling from the principal servlet class. In other words, I have two classes, one is the extension of Httpservlet and the other (the class that make mistakes) is a class I call to do the JNI work.
Now, I added in web.xml the definition of the JNI class (before I forgot) and looks the mistakes with arrays works, but know the there's a new problem and get an IOexception on the applet that call the servlet. When I coment the JNI calls the exception dissapears and all works ok, but I am not getting any exception report on the tomcat ".out".
Please suggestions.

Calling servlet from another method

Hi,
I am writing a program which requires executing another servlet from within
thie main program. I do not care to return the information from the servlet
request.
http://usx500.crn.st.com:7000/TPMCenter_V2/insertAutomationValue.do?reqCode=confirmed
Thanks for the help.

The reason I continue posting this question, is because I cannot find a solution.
I have looked through the link provided, as well as many other solutions on the web,
none which have been successful. Following are two solutions which I have tried, and
niether have worked. I still am in need of some help in resolving this. If you would like
to assist me in this it would be greatly appreciated.
Dr Clap--
If you do not have a suggested solution, simply do not reply.
Solution 1 ---
    try {
        // Construct data
        String data = URLEncoder.encode( "reqCode", "UTF-8") + "=" + URLEncoder.encode( "show", "UTF-8" ) ;
        // Create a socket to the host
        String hostname = "usx500.crn.st.com" ;
        int port = 7000 ;
        InetAddress addr = InetAddress.getByName( hostname );
        Socket socket = new Socket( addr, port );
        // Send header
        String path = "/TPMCenter_V2/insertAutomationValue.do";
        BufferedWriter wr = new BufferedWriter( new OutputStreamWriter( socket.getOutputStream(), "UTF8" ) ) ;
        wr.write( "POST " + path + " HTTP/1.0\r\n" );
        wr.write( "Content-Length: " + data.length() + "\r\n" ) ;
        wr.write( "Content-Type: application/x-www-form-urlencoded\r\n" ) ;
        wr.write("\r\n");
        // Send data
        wr.write(data);
        wr.flush();
        wr.close();
    } catch (Exception e) {
        e.printStackTrace() ;
    }Solution 2 ---
try{
    URLConnection c = new URL("http://usx500.crn.st.com:7000/TPMCenter_V2/insertAutomationValue.do?reqCode=show").openConnection();
    c.connect();
}catch(MalformedURLException murle){
    System.out.println(murle);
}catch(IOException ioe){
    System.out.println(ioe);
}

Displaying array from another method

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