The following event handler should execute when the user clicks a Multiply JButton. Assume that each of the JTextFields contains text that represents an integer value. Identify the error(s) in the code.
```
1 private void multiplyJButtonActionPerformed( ActionEvent event )
2 {
3 resultJTextField.setText( leftOperandJTextField.getText() *
4 rightOperandJTextField.getText() );
5
6 } // multiplyJButtonActionPerformed
```
The values of the text properties of leftOperandJTextField and rightOperand- JTextField cannot be used in a calculation until they are converted to numeric values using Integer.parseInt. Then, the result of the calculation must be converted back to text using String.valueOf to be displayed in the resultJTextField. The corrected code is shown below:
```
1 private void multiplyJButtonActionPerformed( ActionEvent event )
2 {
3 resultJTextField.setText( String.valueOf(
4 Integer.parseInt( leftOperandJTextField.getText() ) *
5 Integer.parseInt( rightOperandJTextField.getText() ) ) );
6
7 } // end method multiplyJButtonActionPerformed
```
You might also like to view...
Select the code below that will configure a background image called parchment.gif for a web page using CSS.
a. body {background-image:url(parchment.gif); } b. document {background:parchment.gif; } c. body {background:parchment.gif’} d. body {background-color:parchment.gif;}
Apply the appropriate transformations described in Section 10.4.2 to the associations below. Assume that all associations are bidirectional and that they can change during the lifetime of each object. Write the source code needed to manage the associations, including class, field, and method declarations, method bodies, and visibility.
What will be an ideal response?
You have just installed two new Linux servers to handle a new application. You want to integrate user authentication between Linux and your existing Windows Server 2012 R2 domain controllers. What can you do?
A. Create a forest trust B. Create a transitive trust C. Create a realm trust D. Create an external trust
The Document Inspector is useful when you want to:
What will be an ideal response?