Java help needed.. badly.

[derbys]

Hey im stuck on a question that i need to do, i have pretty much the basics of the programme but am not sure how to get it implemented so that it'll work. The question is :

Declare a two dimensional array with 10 rows and 10 columns and initialise:
a) All the elements of its third row to 10
b) All the elements of its 6th column to 20
c) And all the other elements to 5
in that order.

I have the following piece of code that is pretty much the core of the program:

import uwejava.*;
import glos.*;
 
public class exc4 
{
 
 public int nums;
 
 
 for(int y = 0; y < nums.length; ++y)
  for(int x = 0; x < nums[i].length; ++x)
    if(y == 2)
      nums[y][x] = 10;
    else if(x == 19)
      nums[y][x] = 20;
    else
      nums[y][x] = 5;
  }
 

So if anyone can figure out how to implemet it to work correctly id be delighted. Two solid days of java has pretty much turned my brain to mush :(

[r035198x]

Hey im stuck on a question that i need to do, i have pretty much the basics of the programme but am not sure how to get it implemented so that it'll work. The question is :

Declare a two dimensional array with 10 rows and 10 columns and initialise:
a) All the elements of its third row to 10
b) All the elements of its 6th column to 20
c) And all the other elements to 5
in that order.

I have the following piece of code that is pretty much the core of the program:

import uwejava.*;
import glos.*;
 
public class exc4 
{
 
 public int nums;
 
 
 for(int y = 0; y < nums.length; ++y)
  for(int x = 0; x < nums[i].length; ++x)
    if(y == 2)
      nums[y][x] = 10;
    else if(x == 19)
      nums[y][x] = 20;
    else
      nums[y][x] = 5;
  }
 

So if anyone can figure out how to implemet it to work correctly id be delighted. Two solid days of java has pretty much turned my brain to mush :(

public class Exc4 {
    public static void main(String[] args) { // every java application has to have this method
        int[][] nums = new int[10][10];//declares a 10 x 10 array of ints
        for(int i = 0; i < nums.length; i++) {
            for(int j = 0; j < nums.length; j++) {
                if(i == 2) {
                    nums[i][j] = 10;
                }
                else if(j == 5) {
                    nums[i][j] = 20;
                }
                else {
                    nums[i][j] = 5;
                }
            }
        }
        for(int i = 0; i < nums.length; i++) {
            for(int j = 0; j < nums.length; j++) {
                System.out.print(""+nums[i][j]);
            }
            System.out.println();
        }
    }
}

[derbys]

That's brillaint thanks, and opne more question (im a cheeky so and so, i know) I need to

-Create a 50-element integer array
-Fills this array with the random numbers in the range 1 to 10000 and display it.

I *think* i know how i create the integer and random numbers, with the code below - but im not 100% sure on how i should go about displaying it, any help again would be brilliant.

int[] myArray= new int[50]; // Declaring 50 integers
 
for (int i = 0; i < myArray.length; i++) { //Random number
            Double random = new Double(Math.random() * 10000);
            int randomInt = random.intValue();
            myArray[i] = randomInt;
 
        }
 

I think that's what it is, just need to know what to do to display it

Cheers

[r035198x]

That's brillaint thanks, and opne more question (im a cheeky so and so, i know) I need to

-Create a 50-element integer array
-Fills this array with the random numbers in the range 1 to 10000 and display it.

I *think* i know how i create the integer and random numbers, with the code below - but im not 100% sure on how i should go about displaying it, any help again would be brilliant.

int[] myArray= new int[50]; // Declaring 50 integers
 
for (int i = 0; i < myArray.length; i++) { //Random number
            Double random = new Double(Math.random() * 10000);
            int randomInt = random.intValue();
            myArray[i] = randomInt;
 
        }
 

I think that's what it is, just need to know what to do to display it

Cheers

for(int i = 0; i < myArray.length; i++) {
   System.out.print(myArray[i] + " ");// will print all numbers in one line
}

or if you are using jdk 1.5

for(int i : myArray) {
   System.out.print(i + " ");
}