Thread: Need help with 2D Array

Working on a project where I have to use a 2D array to store highest and lowest temperatures for each month of the year.

Trying to get the first bit of it to compile but I keep getting these errors:

Line 33: variable high might not have been initialized
for (int high; high < array.length; high++)

Line 35: variable low might not have been initialized
for (int low; low < array.length; low++)

Seems like a simple error, but I just can't figure it out..
here is the code:

import java.util.*;
 
public class HighestAndLowestTemperature
{
	static Scanner console = new Scanner(System.in);
 
	static int array;
	static int high;
	static int low;
	static int index;
 
	public static void main(String[] args)
	{
		System.out.println ("Enter the highest temperature for each month of the year: ");
		high = console.nextInt();
 
		System.out.println("Enter the lowest temperature for each month of the year: ");
		low = console.nextInt();
 
		int[][] array = new int[high][low];
 
	}
	public static void getData(int array[][])
	{
		for (int high; high < array.length; high++)
		{
			for (int low; low < array.length; low++)
			System.out.print(array[high][low] + " ");
		}
	}
}

Thanks!

variable high might not have been initialized

The error message says that the compiler does not see where you have assigned a value to the high variable before you use it.
Check your code and make sure you give it a value BEFORE you try to use it.

The normal syntax for a for statement is:
for (int high = 0; high < array.length; high++)

ergh.. Can't believe I didn't catch that.

Thanks

Sorry to be a pest but I'm having another problem that I just can't figure out.

To get input from the user I figured I would need another for loop to get the highest temps for each 12 months and then the lowest temps for each 12 months. My code is compiling but when I run it.. it loops through everything and doesn't allow me to enter any data...

import java.util.*;
 
public class HighestAndLowestTemperature
{
	static Scanner console = new Scanner(System.in);
 
	static int array;
	static int high;
	static int low;
	static int index;
 
	public static void main(String[] args)
	{
		int[][] array = new int[high][low];
 
		System.out.println ("Enter the 12 highest temperature for each month of the year: ");
		for (int high = 0; high < array.length; high++)
		{
			high = console.nextInt();
			System.out.println();
		}
		System.out.println("Enter the 12 lowest temperature for each month of the year: ");
		for (int low = 0; low < array.length; low++)
		{
			low = console.nextInt();
			System.out.println();
		}
 
 
	}
	public static void getData(int array[][])
	{
		for (int high = 0; high < array.length; high++)
		{
			for (int low = 0; low < array.length; low++)
			System.out.print(array[high][low] + " ");
		}
	}
}

What controls how many times you go thru a for loop? Is that value > 0?
If it is zero will you loop any times?

Look back at your code in your first post.