Problem 14 What class do you use to create ... [FREE SOLUTION]

Chapter 13: Problem 14

What class do you use to create a radio button menu item? What do you pass to the class constructor? How do you cause it to be initially selected?

Short Answer

Expert verified

Answer: The `JRadioButtonMenuItem` class is used to create a radio button menu item. Different constructors can be used for various initial properties, such as `JRadioButtonMenuItem()`, `JRadioButtonMenuItem(String text)`, and `JRadioButtonMenuItem(String text, boolean selected)`. To make the radio button menu item initially selected, pass `true` as the second parameter of the constructor `JRadioButtonMenuItem(String text, boolean selected)` or use the `setSelected(boolean selected)` method, passing `true` as the argument.

Step by step solution

Class for Radio Button Menu Item

The class used to create a radio button menu item is `JRadioButtonMenuItem`. It is part of the javax.swing package in Java.

Constructor Parameters

The class constructor for `JRadioButtonMenuItem` can take different parameters, depending on the desired initial properties for the radio button menu item. Some commonly used constructors are: - `JRadioButtonMenuItem()` 鈥� Creates a radio button menu item with no initial text and not initially selected. - `JRadioButtonMenuItem(String text)` 鈥� Creates a radio button menu item with the specified `text` as its label and not initially selected. - `JRadioButtonMenuItem(String text, boolean selected)` 鈥� Creates a radio button menu item with the specified `text` as its label and a boolean value `selected` that indicates whether the radio button is initially selected or not.

Initial Selection

To make the radio button menu item initially selected, you need to pass `true` as the second parameter of the constructor `JRadioButtonMenuItem(String text, boolean selected)`. Alternatively, you can use the `setSelected(boolean selected)` method of the `JRadioButtonMenuItem` class, passing `true` as the argument. Example: ``` JRadioButtonMenuItem radioButtonMenuItem = new JRadioButtonMenuItem("Option 1", true); // or radioButtonMenuItem.setSelected(true); ```

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What class do you use to create a radio button menu item? What do you pass to the class constructor? How do you cause it to be initially selected?

Short Answer

Step by step solution

Class for Radio Button Menu Item

Constructor Parameters

Initial Selection

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