If statement is not working properly

[Alpa]

Hi,

I have a problem with my if-statement. It isn't working properly.

I created a JButton and a JTextField. I want the user to only enter numbers. If he enters a letter or nothing, a MessageDialog should appear. That's working completely fine with this code:

double number;

try {
		            number = Double.parseDouble(tfnumber.getText());
		            } catch (NumberFormatException e) {
		            	JOptionPane.showMessageDialog(null, "Invalid bet. Please re-enter your number!");
		            }

But now I want to add some additional restrictions. "number" has to be less than "amount" and is supposed to be greater than 0 (so negative numbers are not allowed). But it is not working. Please have a look at this snippet:

double number;
double amount;

try {
		            number = Double.parseDouble(tfnumber.getText());
		            
		            if ( number < amount || number > 0){		            	
                                JOptionPane.showMessageDialog(null, "It's working!");
		            } else {
		            	JOptionPane.showMessageDialog(null, "Invalid input! Your input was either negative or 0!");
		            }
		            } catch (NumberFormatException e) {
		            	JOptionPane.showMessageDialog(null, "Invalid input! Your input wasn't a number");
		            }

If I enter a negative number or 0, "It's working!" appears although it shouldn't. How can I get rid of that and where's the problem?

[Fubarable]

Think through the logic here:

if ( number < amount || number > 0)

Then answer: when will this ever be false? A simple fix will correct this.

[Alpa]

Aww, haven't seen it >.<. By replacing || with && it's working as it should. Thank you.

[Fubarable]

Aww, haven't seen it >.<. By replacing || with && it's working as it should. Thank you.

Eggsactly! And you're welcome!