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Thread: can't get my entered values

  1. #1
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    Default can't get my entered values

    i want to enter student records and i made functions and arrays for that...the problem is i can't get my entered values and back to me and the output is "null" please check screen shot also.
    package javaapplication10;
     
    import javax.swing.JOptionPane;
    public class JavaApplication10 {
     
        int count=0;
        public int x=10;
        public int rollno[];
     
        public String[] name;        
           public String[] sclass;
           public int[] marks;
           public void JavaApplication10()//constructor
           {
             rollno=new int[10];
             name=new String[10];
             sclass=new String[10];
             marks=new int[10];
     
     
           }
     
           public void addrec(int a,String b,String c,int d)
           {
     
           count++;
     
           }
           public void deletrec()
           {
     
           }
           public void viewrec()
           {
     
               for (int i=0;i<=9;i++)
           System.out.println(rollno[i]+"\t"+name[i]+"\t"+sclass[i]+"\t"+marks[i]);
     
           }
     
        public static void main(String[] args) {
            // TODO code application logic here
          JavaApplication10 objjj=new  JavaApplication10();
          objjj.JavaApplication10();
          String r=JOptionPane.showInputDialog("enter the roll number");
          int R=Integer.parseInt(r);
         String n=JOptionPane.showInputDialog("enter the name of student");
         String c=JOptionPane.showInputDialog("enter the class of student");
         String m=JOptionPane.showInputDialog("enter the marks of student");
         int M=Integer.parseInt(m);
         objjj.addrec(R,n,c,M);
         objjj.viewrec();
     
     
        }
     
    }
    Attached Images Attached Images


  2. #2
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    Default Re: can't get my entered values

    What should your addrec() method be doing? It doesn't seem correct.
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  3. #3
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    Default Re: can't get my entered values

    Quote Originally Posted by aussiemcgr View Post
    What should your addrec() method be doing? It doesn't seem correct.
    by addrec method i want to enter record by passing values from function

  4. #4
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    Default Re: can't get my entered values

    There is nothing in the addrec method to store the parameter values in the array. Here's an example of how you would do that...

    public void addrec(int a,String b,String c,int d)
    {
       rollno[count] = a;
       count++;
    }

    You would do the same for each entry.


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  5. The Following User Says Thank You to WhiteSoup12 For This Useful Post:

    want2code (August 9th, 2014)

  6. #5
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    Default Re: can't get my entered values

    Quote Originally Posted by WhiteSoup12 View Post
    There is nothing in the addrec method to store the parameter values in the array. Here's an example of how you would do that...

    public void addrec(int a,String b,String c,int d)
    {
       rollno[count] = a;
       count++;
    }

    You would do the same for each entry.
    I'm loving this forum this really helped me thanks whitesoup

  7. #6
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    Default Re: can't get my entered values

    You mean you love spoonfeeding. The question posed by aussiemcgr was meant to get you thinking about why your code didn't do what you wanted.
    Improving the world one idiot at a time!

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