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What's wrong with simple Scanner program?
import javax.swing.*; import java.util.*; public class Scanner1{ public static void main(String[] args){ String first, output; Scanner scanner1 = new Scanner(System.in); System.out.print("First: "); first = scanner1.next(); JFrame mainWindow; if (first == "a") { output = "3.5" ; } else { output = "No." ; } System.out.println(output); } }
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Re: What's wrong with simple Scanner program?
The program compiles and runs however if I input a it does not output 3.5
Re: What's wrong with simple Scanner program?
you cannot compare String object with "=="
for String comparison
use
"a".equals(first)
Re: What's wrong with simple Scanner program?
As said by DanBrown.. This is a common Java mistake.
Please read - Common Java Mistakes == operator or equals() method
Problem category: Logic Problems
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