asked on

passing variables between classes

I am writing a pretest that is 2 pages. afterthe first page the user picks his answers and hits the "save" button and then the 2nd page comes up, he picks his answers, and then he hits "submit" to finish.

how do i save the answers from class of the first page and get them to the class on the second page so I can check them when submit is pressed?

public class page1 extends javax.swing.JFrame

if(JRadiobutton1.isSelected())
answer[1] = 1;

etc.

answer[1] = 3
answer[2]= 4

public class page2 extends javax.swing.JFrame

answer[3] = 4
answer[4] = 1

answer[1] and answer[2] need to be passed to class page2 somehow so i can check the answers

hoomanv

you dont need to pass answer array to second page
store all the answers in your current application frame
but instead change the frame that is shown each time to the person
use a CardLayout to change pretest's pages

hoomanv

I mean dont create a new frame for each page
have them all in one frame but switch them using CardLayout or just JTabbedPane

jpking72

ASKER

isn't there a way to just pass variables from class to class?

ASKER CERTIFIED SOLUTION

hoomanv

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SOLUTION

d3stor

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Mayank S

>> isn't there a way to just pass variables from class to class?

Well, you can maintain the answers at a global level in some static collection.

public class AnswersList // make it a singleton
{
private static AnswersList instance ;
private Hashtable answers ;
private AnswersList ()
{
answers = new Hashtable () ;
}
public Hashtable getAnswers ()
{
return answers ;
}
// give a static synchronized getInstance ()
}

You can use this hash-table in all the frames for storing answers (values) along with question-numbers (keys) at a global level.

jpking72

ASKER

all you have to do is put it in the constructor:

UserProfile up = new UserProfile(level,start);

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

public class UserProfile {

/** Creates a new instance of UserProfile */
private String level;
private int start;
public UserProfile(String a,int b) {
level = a;
start = b;
}
public String getLevel(){
return level;
}
public int getFuntion(){
return start;
}
}

Mayank S

? What is UserProfile?

jpking72

ASKER

UserProfile is supposed to send sends the "level" and "start" to the "Startpage" class. my question now is how do you call method "getLevel" from outside the class? how do you "pass" the level and start to a new class (say class "Test")? I'm looking for line /**********/.

public class test {

/** Creates a new instance of test */
public test() {
}

String level = up.getLevel(); /**************/
}

================================
public class Startpage
...
String level = "beginner";
int start = 5;
...
UserProfile up = new UserProfile(level,start);

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

public class UserProfile {

/** Creates a new instance of UserProfile */
private String level;
private int start;
public UserProfile(String a,int b) {
level = a;
start = b;
}
public String getLevel(){
return level;
}
public int getFuntion(){
return start;
}
}

Mayank S

>> String level = up.getLevel();

Is correct. You need to write it inside a method where you will define an object of UserProfile called 'up'.

jpking72

ASKER

it's still not clear.

SOLUTION

Mayank S

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