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Thread: How do I request user value for array object's instance variables with this tester class?

  1. #1
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    Default How do I request user value for array object's instance variables with this tester class?

    I am trying to figure out how to request user input for the values of an array objects instance variables using jOP panes. What would I use to do this?

    Here is my tester class.
    import javax.swing.JOptionPane;
     
    public class StudentTester{
        public static void main( String[] args ){
     
            // create an array of student variables
            Student[] studArray = new Student[4];
     
            // instantiate students using full constructor
            studArray[0] = new Student("Bob", "Barker", "123456", 1600);
            //studArray[1]setSatScore(JOptionPane.showInputDialog("Please enter a valid SAT score. Allowable range is 600 to 2400"));
            studArray[1] = new Student("Carol", "Cowart","234561", 1500);
            studArray[2] = new Student("Dan", "Smith", "345612", 1550);
            studArray[3] = new Student("Carl", "Newell", "456123", 1800);
     
            // instantiates objects and displays all get methods for one student object
            for( int i = 0; i < studArray.length; i++ ){
                System.out.println( "First name " + i + " is: \n" + studArray[0].getFirstName());
                System.out.println( "Last name " + i + " is: \n" + studArray[0].getLastName());
                System.out.println( "ID number " + i + " is: \n" + studArray[0].getIdNumber());
                System.out.println( "SAT Score " + i + " is: \n" + studArray[0].getSatScore() +"\n" );
     
    		// second loop to display toString output
            for( int j = 0; j < studArray.length; i++ ){
                System.out.println( "The student at array index " + i + " is: \n" + studArray[i].toString() +"\n" );
     
    		}
    	}
    }
    }


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: How do I request user value for array object's instance variables with this tester class?

    Are you trying to build a String to show in a JOptionPane method using the contents of some arrays like the posted code does for the println() statements in the for loops?
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: How do I request user value for array object's instance variables with this tester class?

    Yes I believe so, and I need the user to be able to set the values for the three string variables (first name, last name, id number) and the lone int variable (SAT score).

  4. #4
    Super Moderator Norm's Avatar
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    Default Re: How do I request user value for array object's instance variables with this tester class?

    I was asking if you wanted to build a String to show as a message to the user.
    Your last post seems to say you want to read data from a user and store it into variables.
    Do you want to use a method of the JOptionPane class to read data from a user and store what the user enters in a variable? The String read for the number will have to be converted from a String to a number using a method of the Integer or Long class depending on how large it is.

    There are lots of examples of the uses of JOptionPane class methods here on the forum. Do a search to find some.
    If you don't understand my answer, don't ignore it, ask a question.

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