Thread: Find Biggest Number in Array

I am trying to find the Biggest number in an array. I can't seem to get my coding down pat with it.

		myarray[size] = JOptionPane.showInputDialog("Enter Number" + size + ":");
 
		if (Integer.valueOf(myarray[size]) > 0 && Integer.valueOf(myarray[size]) <= 30)
		{
 
		}	
		    //What to do if number entered does not fit criteria
			else 
			{
				JOptionPane.showInputDialog("Please enter a number between 0 and 30");
			}
			if (myarray[size] > Biggest)
			{
				Biggest = myarray[size];
				return int Biggest;
			}
 
		}

This is what I am working with and like I said for some reason I can't get my code to return the biggest number that was entered.

Does your code compile? If not and you can't understand the compiler messages, post them. Also post the code they refer to rather than just a small snippet.

I am trying to find the Biggest number in an array.

Before writing even a line of code decide *how* you are going to go about finding the biggest number in the array. This begins, not as a computer or coding problem, but as one of analysis and expression. Confronted with a long list of numbers how would you, yourself, determine the largest? What (if anything) would you have to remember as you worked through the problem? How many things would you have to remember?

Such a "plan of attack" will form the basis of your code.

Ah, that makes sense. I was barking up the wrong tree thinking the error was due to trying to pull an int from a string array. Let me work on the coding a little bit and declare my statements a little different and see what I can come up with.

try using an enhanced for loop instead of a normal for loop

for example:

package stuff;
 
public class tester
{
	public static void main(String [] args)
	{
		int[] array = {5,2,7,5,6};
		int largest = 0;
 
//enhanced for loop here
 
		for(int i : array)
		{
			if(i > largest)
			{
				largest = i;
			}
		}
		System.out.println(largest);
 
	}
}

This would print out the number 7. the enhanced for loop is for running through an array, list, arraylist, etc... It lasts as long as the length of what you're sorting through. It takes the first value from array, in this case 5, and puts it into " i " and from there, it runs the code in the loop until it runs out of values in the array.