Use of combo box (JComboBox)

We know that a combo box is one of the most commonly used components in a real-world application.

I use the combo box (JComboBox) to compile according to the teacher's request.

Here's my code because I can't use the format the teacher says.

Import java.awt.*; /* contains all classes for creating the user interface and drawing graphics images. */
Import javax.swing.*; /* Provides a set of "lightweight" components that try to make these components work the same way on all platforms */


public class Jcomboboxdemo extends JFrame {


Private static final long serialversionuid = 1L;

Public Jcomboboxdemo () {
/*
* Container is the parent of all containers and is also a subclass of the Java language Component class component. A container is a component with the ability to accommodate other components and containers
* The most basic element of a Java graphical user interface is a component, which is an object that can be graphically displayed on the screen and can interact with the user, such as a button, a text box, and so on.
* In Java, components are typically placed inside a certain container using the This.getcontentpane () method to return the ContentPane object of this form
*/
Container ContentPane = This.getcontentpane ();

/* Create a Panel object that specifies that the layout manager is a gridlayout,1 row 2 column. JPanel Default layout management is FlowLayout */
JPanel JPanel1 = new JPanel (new GridLayout (1, 2));

Using string arrays to build JComboBox
String[] fruit = {"Apple", "banana", "orange", "pear", "Mango"};
jcombobox<string> jComboBox1 = new jcombobox<string> (fruit);
Jcombobox1.additem ("other"); Add another option at the end of the list box option

Set the caption border of a JList1 object
Jcombobox1.setborder (Borderfactory.createtitledborder ("Your favorite Fruit:"));
Add list box JComboBox1 to panel
Jpanel1.add (JComboBox1);

Build JComboBox with ComboBoxModel
comboboxmodel<?> MyModel = new MyModel ();
JComboBox jComboBox2 = new JComboBox (MyModel);
Set the caption border of a JList1 object
Jcombobox2.setborder (Borderfactory.createtitledborder ("Your favorite Fruit:"));
Add list box JComboBox2 to panel
Jpanel1.add (JCOMBOBOX2);

Add Panel to parent container
Contentpane.add (JPANEL1);
Set the title of this form
This.settitle ("Jcomboboxdemo");
Set the initial size shown in this form
This.setsize (350, 90);
This.setlocation (300, 200);
Set this form to be initially visible
This.setvisible (TRUE);


}
Class MyModel extends DefaultComboBoxModel {
String[] fruit = {"Apple", "banana", "orange", "pear", "Mango"};

MyModel () {
for (int i = 0; i < fruit.length; i++) {
/* AddElement () method to add an option element to a list box */
This.addelement (Fruit[i]);
}
}
}

public static void Main (String args[]) {
Jcomboboxdemo test = new Jcomboboxdemo ();
}
}

Use of combo box (JComboBox)