Thread: Post variable in the main class

Hello guys. I wanna ask you, how to post variable from any class in the main class? I know how to post from main class in the next class, but dunno how to post from next class in the main..
Can you help me?

Thank you

Sorry for bad english language

Please post an example of what you mean by Main class, Next class, and how you want to share variables between them.

Even when a common written language, like English, may not be the best between us, we should be able to communicate in another language we both know and love, Java.

I mean Main class which have a public static void main(String[]args) { } method.

I built on an earlier example I created for a similar topic. Since you wouldn't give an example, I have no idea if it answers your question, but I've covered most every angle of passing values between classes. If you think of another approach or still have questions, please let me know.

// a class with a main() method to start
// a simple class that sends values to another class via the
// other class' constructor and using a setter method in the other class
public class PassValuesBetweenClassesDemo
{
    // instance variables
    int rValue;
    int gValue;
    int bValue;
    ReceiveClass receiveClass;
 
    // default constructor
    public PassValuesBetweenClassesDemo()
    {
        rValue = 5;
        gValue = 15;
        bValue = 25;
 
        // create an instance of ReceiveClass and pass the values
        // through the constructor
        receiveClass = new ReceiveClass( rValue, gValue, bValue );
 
        // pass an instance of SendClass to ReceiveClass
        receiveClass.setSendClass( this );
 
        // output the values
        receiveClass.printRGBValues();
 
        // or, alternatively send the values to the receiveClass
        // instance using the setter method
        receiveClass.setRGBValues( rValue + 5, gValue + 5, bValue + 5 );
 
        // output the new values
        System.out.println( "\nAfter increasing the values by 5, " );
        receiveClass.printRGBValues();
 
        // pass the values back from receiveClass to sendClass
        receiveClass.setValuesInSendClass();
 
        // print the values as now set
        System.out.println( "\nAfter passing the values back from the"
            + " receive class,\nthe values in the send class are: " );
        System.out.println( "rValue: " + rValue );
        System.out.println( "gValue: " + gValue );
        System.out.println( "bValue: " + bValue );
 
    } // end default constructor
 
    // a main() method
    public static void main( String[] args )
    {
        new PassValuesBetweenClassesDemo();
 
    } // end method main()
 
 
    // setters to set the values
    public void setRValue( int rValue )
    {
        this.rValue = rValue;
 
    } // end method setRValue()
 
    public void setGValue( int gValue )
    {
        this.gValue = gValue;
 
    } // end method setGValue()
 
    public void setBValue( int bValue )
    {
        this.bValue = bValue;
 
    } // end method setBValue()
 
} // end class PassValuesBetweenClassesDemo
 
// a class to receive the values
class ReceiveClass
{
    // instance variables
    private int rValue;
    private int gValue;
    private int bValue;
    private PassValuesBetweenClassesDemo sendClass;
 
    // a constructor that accepts the 3 values
    public ReceiveClass( int rValue, int gValue, int bValue )
    {
        this.rValue = rValue;
        this.gValue = gValue;
        this.bValue = bValue;
 
    } // end constructor
 
 
    // a method to set the values
    public void setRGBValues( int rValue, int gValue, int bValue )
    {
        this.rValue = rValue;
        this.gValue = gValue;
        this.bValue = bValue;
 
    } // end method setRGBValues()
 
    // to output the values
    public void printRGBValues()
    {
        System.out.println( "The values in the receive class are: " );
        System.out.println( "rValue: " + rValue );
        System.out.println( "gValue: " + gValue );
        System.out.println( "bValue: " + bValue );
 
    } // end method printRGBValues()
 
    // to set the instance variable sendClass
    public void setSendClass( PassValuesBetweenClassesDemo sendClass )
    {
        this.sendClass = sendClass;
 
    } // end method setSendClass()
 
    // pass the values back to SendClass
    public void setValuesInSendClass()
    {
        sendClass.setRValue( rValue );
        sendClass.setGValue( gValue );
        sendClass.setBValue( bValue );
 
    } // end method setValuesInSendClass()
 
} // end class ReceiveClass

Thanks I fix it THANK THANK!!!!!