(Solved) : Question 5 Event Handler One Method True False 1 Points Question 6 Inner Class Constructor Q42689697 . . .

QUESTION 5

1. An Event Handler can have only one method.

   True

   False

1 points   

QUESTION 6

1. An inner class can have constructor(s) and instancevariables.

   True

   False

1 points   

QUESTION 7

1. To determine an event’s source, the actionPerformed method

   		can call ActionEvent’s getSource method
   		must query its containing class
   		cannot determine the event source
   		must be created with the event source as an instancevariable

1 points   

QUESTION 8

1. How many inner classes can an outer class contain?

   		It may contain, at most, one for each event source
   		An indefinite number
   		It must contain exactly one inner class for each eventsource
   		One

QUESTION 1

1. Events give us the ability to

   		Write programs giving the user more choices in how to interactwith the program
   		Read user input
   		Write classes with no name
   		Write inner classes

QUESTION 2

1. In the following program (which appears several times in thisquiz, and never changes from question to question)WVOneButtonAction.txt

   What is the type of the Event Source?

1 points   

QUESTION 3

1. In the following program (which appears several times in thisquiz, and never changes from question to question)WVOneButtonAction.txt

   What class defines the Event Handler?

1 points   

QUESTION 4

1. In the following program (which appears several times in thisquiz, and never changes from question toquestion)  WVOneButtonAction.txt

   What is WidgetViewerActionEvent?

   		An interface
   		A subclass
   		A superclass
   		An anonymous class

coding for number 2,3,and 4.

1 import java.awt.event.ActionEvent; 2 import javax.swing.JButton; 3 4 public class WVOneButtonAction { 5 6 private JButton jb1; 7 8 public WVOneButtonAction() { 9 WidgetViewer wv = new WidgetViewer();10 jb1 = new JButton(“0”);11 ButtonIncrementer action = new ButtonIncrementer();12 jb1.addActionListener(action);13 wv.add(jb1);14 }1516 class ButtonIncrementer extends WidgetViewerActionEvent {1718 @Override19 public void actionPerformed(ActionEvent e) {20 String bval = jb1.getText();21 int newVal = Integer.parseInt(bval) + 1;22 jb1.setText(String.valueOf(newVal));23 }2425 }2627 }

Expert Answer

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Answer to QUESTION 5 An Event Handler can have only one method. True False 1 points QUESTION 6 An inner class can have constructor…

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