Help with two dimensional array java

[GlassFish]

Hi
I am trying to create an two dimensional array that will store student id and grade. The program has to set the size of the array according to the user input. Then the array should be built and finally the user should be requested to add the information for the student and the grade. All this will be stored in the array. I am not sure to figure out what is wrong here , below is my program.

public class Classavg1
{
public static void main(String[] args)
{
int stu; //The number of stu
int grd = 0;
int ID = 0;
int avg;

**Scanner object**
//Create a Scanner object for keybrd input.
Scanner keybrd = new Scanner(System.in);

//Get the number of stu.
System.out.print("How many stu are in your class? ");
stu = keybrd.nextInt();

//Create an array to hold that number of stu.
int scr[][] = new int [stu][ID];

**code to get student id and grde**
for ( int id = 0; id <scr.length; id++)
{
for (int grd = 0; grd < grd; grd++);
{
System.out.print("Enter student's ID ");
ID = keybrd.nextInt();
System.out.print("Enter Student's grdes ");
scr[id][grd] = keybrd.nextInt();
}
}
}
}

[Modifier]

Hi
I read your program and I have done some modification to it, just check it out

public class Classavg1
{
public static void main(String[] args)
{
int std; //The number of std
int grd = 0;
int ID = 0;
int avg;
Scanner keybrd = new Scanner(System.in);
System.out.print("How many std are in your class? ");
std = keybrd.nextInt();
int scr[][] = new int [std][2]; //we hold id and grde for each //student so number of cols=2
for ( int id = 0; id <scr.length; id++)
{
//for (int grd = 0; grd < grd; grd++);
//{
System.out.print("Enter student's ID ");
ID = keybrd.nextInt();
System.out.print("Enter Student's grdes ");
scr[id][0]=ID;
scr[id][1] = keybrd.nextInt();
//}
}
}
}

[MindSpace]

Hi
hope you have tried the above posted program, it should work with you. Your mistakes were, ID=0 it means you are trying to make an array of

src[std][0],
int scr[][] = new int [stu][ID];
**code to get student id and grde**
for ( int id = 0; id <scr.length; id++)
{
for (int grd = 0; grd < grd; grd++);
{
System.out.print("Enter student's ID ");
ID = keybrd.nextInt();
System.out.print("Enter Student's grdes ");
scr[id][grd] = keybrd.nextInt();
}
}

and this will definitely give you any error if you try to acces it because it is any array of empty array.

[GlassFish]

Hello
Thanks a lot for your help guys. I have successfully solved this program and got the required output. Really it would not have been possible to solve the problem without you guys. Thanks a lot again.