Create a graphical user interface program for solving the quadratic equation ax2 + bx + c = 0. The user will enter values for a, b, and c into text fields and press a “Solve” button. The program will then display a list of the roots in a text field. Your interface should look similar to the above. Use a BorderPane as the parent node of the scene. Use an HBox to hold the four labels and four text fields and another HBox to hold the “Solve” button. The unicode for a superscripted 2 is “\u00B2”. When the user clicks the “Solve” button the program should use Double.parseDouble to parse the a, b, and c text fields. If any of these calls to parseDouble cause an exception then catch the exception and change that text field’s text to “0” (by performing setText("0") on that text field). Do not change the values in the other text fields. Your program should correctly deal with cases where a, b, and/or c are 0 -- For instance, if all three fields are 0 then the roots are all x. If a and b are 0 but c is non-zero, then there are no roots. If a is 0 but b is non-zero, then we have a line with non-zero slope, so there is exactly one root. If a is non-zero, then the number of roots depends on the so-called discriminant: b2 – 4ac. If the discriminant is positive, there are two roots. (See the first example above.) If the discriminant is 0, there is only one root – don’t display it twice. If the discriminant is negative, then there are no roots (“No x”, as above). Thanks in advance! Hopefully this is better organized.
Create a graphical user interface
Your interface should look similar to the above. Use a BorderPane as the parent node of the scene. Use an HBox to hold the four labels and four text fields and another HBox to hold the “Solve” button. The unicode for a superscripted 2 is “\u00B2”.
When the user clicks the “Solve” button the program should use Double.parseDouble to parse the a, b, and c text fields. If any of these calls to parseDouble cause an exception then catch the exception and change that text field’s text to “0” (by performing setText("0") on that text field). Do not change the values in the other text fields.
Your program should correctly deal with cases where a, b, and/or c are 0 --
For instance, if all three fields are 0 then the roots are all x.
If a and b are 0 but c is non-zero, then there are no roots.
If a is 0 but b is non-zero, then we have a line with non-zero slope, so there is exactly one root.
If a is non-zero, then the number of roots depends on the so-called discriminant: b2 – 4ac. If the discriminant is positive, there are two roots. (See the first example above.) If the discriminant is 0, there is only one root – don’t display it twice. If the discriminant is negative, then there are no roots (“No x”, as above).
Thanks in advance! Hopefully this is better organized.
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