Help with an array please!

Hello everyone,
I am brand new to the forum as well as brand new to Java. I am taking a class and so far have been able to figure everything out until now. Basically, I need to write a program that accepts a n x n matrix that will total and display the sum of each row and column. First, the user inputs the matrix size (row and columns are the same so only 1 input is needed at this point). We need nested loops in order to populate the matrix, a method that displays the matrix as well as a method that displays the sums of the rows and columns. The program should run in a loop so that the user can do it again and exception handling is required. I won't have an issue with the loop or the exception handling as so far we have done this before and I have a basic understanding of how to do this. My issue is simply the array. Here is what the output should look like:

Enter number of rows & columns (they will be the same): 3

Row 1, Column 1: 1
Row 1, Column 2: 2
Row 1, Column 3: 9
Row 2, Column 1: 0
Row 2, Column 2: 1
Row 2, Column 3: 2
Row 3, Column 1: 0
Row 3, Column 2: 7
Row 3, Column 3: 1

You Entered the Following Matrix:

1 2 9
0 1 2
0 7 1

The sum of row 1 is 12
The sum of row 2 is 3
The sum of row 3 is 8
The sum of column 1 is 1
The sum of column 2 is 10
The sum of column 3 is 12

I am really lost here and I would appreciate some help if anybody is able to figure this out. Thanks a bunch!
And this is what I have so far (albeit very little):

Code java:

---

import java.util.Scanner;
 
//Begin Class Main
public class Main {
 
    //Begin Main Method
    public static void main(String[] args) {
 
 
 
 
        Scanner input = new Scanner (System.in);
 
        System.out.print("Enter the number of rows & columns (they will be"
                + "the same): ");
        int arraySize = input.nextInt();
 
 
 
 
    } //End Main Method
 
} //End Class Main

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Code tags == readable code (see my signature for details).

What exactly is the problem? Have you read the following for how to define and use arrays ( Arrays (The Java™ Tutorials > Learning the Java Language > Language Basics) )?

Thanks for the link and the reply Copeg. I have an idea of how to define arrays, but my problem is making them so that the user can input the amounts of rows/columns (they will always be the same). I am in my last semester of school (digital forensics) and this is the only thing that I have taken that I just can't get. I am completely lost on pretty much the whole thing.

I got a Ton of help on array lists before from some extremely generous and patient people. Maybe you can use that as an example for learning how to do them.
http://www.javaprogrammingforums.com...help-code.html

This support is only for you as you are totally begginer. There are definitely other ways to handle, but for your level i suggest:
1. Declare an array of huge size.
2. Get a numberic value from user.
3. Limit your array to that value.

Thanks for the tip. I am completely not getting this Java stuff at all, which is just further frustrating me. I can't seem to figure this program out AT ALL!!! This is all that I have so far

import java.util.Scanner;

//Begin Class Main
public class Main {

//Begin Main Method
public static void main(String[] args) {

int arraySize;
int rArray[row][col];


Scanner input = new Scanner (System.in);

System.out.print("Enter the number of rows & columns (they will be "
+ "the same): ");
arraySize = input.nextInt();

rArray = new int[row][col];

}
public static void showArray (int[] array){

Like I said before, the array size is determined by the user and the rows and columns will always be the same therefor I only need to get one number from them. Yet I can't figure any of it out.


} //End Main Method

} //End Class Main

Code java:

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int rArray[row][col];

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What are row and col? Do you declare a 1d array the same way?

Code java:

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int[size] numbers;

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Does that look right?

1. Put your code in code tags.
2. Indent your code with proper IDE. I believe you are using wordpad somewhat...
3.

Code java:

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const row=100;
const int col=100;
int [row]Array[col];
//Get input for rows first.
//Get input for columns.
for(int i=0;i<row;i++)
{
     for(int j=0;j<col;j++)
     {
       array[i][j]=whatever values are;
      }
}

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If you are going to spoonfeed code at least make it correct Java code.

Mixed code and pseudocode. So, i don't try to spoonfeed him.

Well whatever you posted is doing motre harm than good. From experience I have seen clueless n00bs simply copy and paste code into their program and then cannot understand why it doesn't work.

Code java:

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int [row]Array[col];

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The worse you have done is to perpetuate their misunderstanding of how to declare a 2D array. My post above (while I could have just given them the correct code) was to prompt them to think about how to correct it themselves.

Yeah that's my bad.
I correct it.

Code java:

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int [][]array=new int[row][col];

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Peace.