Converting Double to Int

[Rahim2312]

I am running this code (well it's a snippet at least)...

int number1;
int number2;
int Total

number1 = 16 * 4
number2 = 20 * 3

Total = number1 + number2

When doing a calculation does java auto convert Total to a Double even tho I have it declared as int?

[Fubarable]

Why do you think that it may convert the number?

[DarrylBurke]

Code Conventions for the Java Programming Language: Contents

Variable names should start with a lowercase letter.

db

[Rahim2312]

Code Conventions for the Java Programming Language: Contents

Variable names should start with a lowercase letter.

db

Your right on that. I didn't mean to capitalize the "T" in total.

[Rahim2312]

Why do you think that it may convert the number?

This is me totally guessing since I am a very newbie at Java, but when I run this code:

JOptionPane.showMessageDialog("The result of " + total );

It gives me about 4 different errors, and one of them said something (I will give an exact error in a few) about wrong type Double should be Int or something of that nature. Which left me curious if Java would auto-convert Int to Double

[Tolls]

Your best bet would be to show us the full errors and the code they are occurring on.

[Rahim2312]

Here is the code I am using:

import javax.swing.JOptionPane;
import java.lang.Math;
public class TestThis
{
	public static void main (String args[])
	{
		String userInput;
		int oneNumber;
		double length;
		double distance;
		double allAround;
		
		userInput = JOptionPane.showInputDialog("Enter First Number");
		
		oneNumber = Integer.parseInt(userInput);
		
		length = (2 * oneNumber);
		
		distance = ((2 * Math.PI) * oneNumber);
		
		allAround = (Math.PI * oneNumber);
		
		JOptionPane.showMessageDialog(Null, + "The distance is " + oneNumber );
		System.exit(0);
	}
}

What is the best way to show the errors?

[Tolls]

Copy and paste them into here.
Presumably these are compilation errors?

[Tolls]

This line:

      JOptionPane.showMessageDialog(Null, +"The distance is " + oneNumber);

is completely wrong, though.
What is 'Null'?
And that first '+' is not needed.

[Rahim2312]

Copy and paste them into here.
Presumably these are compilation errors?

Nice I never knew you could copy/paste from the command prompt!! Here are the errors:

c:\A_Programs>javac j.java
j.java:19: error: possible loss of precision
circumference = (2 * Math.PI * radius);
^
required: int
found: double
j.java:21: error: possible loss of precision
area = (Math.PI * radius);
^
required: int
found: double
j.java:23: error: cannot find symbol
JOptionPane.showMessageDialog(Null, + "The circumference is " +
radius );
^
symbol: variable Null
location: class j
j.java:23: error: bad operand type String for unary operator '+'
JOptionPane.showMessageDialog(Null, + "The circumference is " +
radius );
^
4 errors

c:\A_Programs>javac TestThis.java
TestThis.java:23: error: cannot find symbol
JOptionPane.showMessageDialog(Null, + "The distance is " + oneNumber );
^
symbol: variable Null
location: class TestThis
TestThis.java:23: error: bad operand type String for unary operator '+'
JOptionPane.showMessageDialog(Null, + "The distance is " + oneNumber );
^
2 errors

[Tolls]

Um, that's not the code you posted above.
At least not the stuff about j.java.
And the errors for TestThis.java are both on the line I highlighted...

[Rahim2312]

Um, that's not the code you posted above.
At least not the stuff about j.java.
And the errors for TestThis.java are both on the line I highlighted...

Dangit your right, sorry I have like 3 different ones that I was trying to see if this way would work, okay what about this way. I'll check the line of code you posted above and see if I can tinker with it to get the code functioning properly.

[Rahim2312]

This line:

      JOptionPane.showMessageDialog(Null, +"The distance is " + oneNumber);

is completely wrong, though.
What is 'Null'?
And that first '+' is not needed.

Should the code just read like this:

      JOptionPane.showMessageDialog("The distance is " + oneNumber);

[Tolls]

Look at the API for JOptionPane and see, but as it stands that code is syntactically incorrect, before we even think about the API.

[Rahim2312]

I am copying this code:

JOptionPane.showMessageDialog(frame, "Eggs are not supposed to be green.");

from this site:

How to Make Dialogs (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components)

And when I try to run it I get an error of:
c:\A_Programs>javac tes.java
tes.java:8: error: cannot find symbol
JOptionPane.showMessageDialog(frame, "Eggs are not supposed to b
e green.");
^
symbol: variable frame
location: class tes
1 error

[Tolls]

That's saying you don't have a 'frame' variable, so presumably you don't.