Question 7 (5 points) What kind of object is used group radio buttons? Question

Question

Question 7 (5 points)

What kind of object is used group radio buttons?

Question 7 options:

JButtonGroup

Group

ButtonGroup

ContainerGroup

Save

Question 8 (5 points)

Which of the following method calls is used to prevent the user from modifying a text field tf?

Question 8 options:

tf.setChangable(false);

tf.preventMdification()

tf.setUneditable()

tf.setEditable(false);

Save

Question 9 (5 points)

When you want to allow the user to select only one of several choices, which you use?

Question 9 options:

Radio buttons

Ordinary buttons

Text fields

Check boxes

Save

Question 10 (5 points)

What is the benefit of using layout managers?

Question 10 options:

It reduces the amount of code needed

It defines how components of a window should be arranged when it is resized

It makes the program run much faster

It reduces the amount of memory necessary to store the window components

Save

Question 11 (5 points)

Which of the following true about source and listener objects?

Question 11 options:

Both objects must be of the same type

They must always be different objects

They can be the same object

The objects must always be of different types

Save

Question 12 (5 points)

Which of the following statements is incorrect?

Question 12 options:

A listener may listen for multiple sources

The listener object must be registered by the source object

A source object can only have one listener object

The listener object's class must implement the corresponding event-listener interface

Save

JButtonGroup

Group

ButtonGroup

ContainerGroup

Explanation / Answer

Question 7 (5 points)
What kind of object is used group radio buttons?
Question 7 Answer:
   
ButtonGroup
   
Explanation:

The object of ButtonGroup allows that the user can select only one button at a time.

Question 8 (5 points)
Which of the following method calls is used to prevent the user from modifying a text field tf?
Question 8 Answer:
   
tf.setEditable(false);

Explanation:

User can edit the text if the value is set to true. As it is set to false it will prevent the user from editing the text in the textbox.

Question 9 (5 points)

When you want to allow the user to select only one of several choices, which you use?
Question 9 Answer:
   
Radio buttons
   
Explanation :

In a group of radio buttons, the user can select only one button.
If he selects one button, the remaining buttons in the group are deselected.

Question 10 (5 points)

What is the benefit of using layout managers?
Question 10 Answer:
   
  
It defines how components of a window should be arranged when it is resized
   
Explanation:

Components in a particular manner are arranged by the layout manager.

Question 11 (5 points)

Which of the following true about source and listener objects?
Question 11 Answer:
   
   
They can be the same object

Explanation:

You can create an object of a class and the class should be implementing the listener class. So both the objects can be of the same type.

Question 12 (5 points)
Which of the following statements is incorrect?
Question 12 Answer:
   

The listener object's class must implement the corresponding event-listener interface

Explanation:

You can create an object of a class and the class should be implementing the listener class.

Related Questions

Navigate

• Browse (All)
• Browse Q
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.