Java AWT | Choice Class

Choice class is part of Java Abstract Window Toolkit(AWT). The Choice class presents a pop- up menu for the user, the user may select an item from the popup menu. The selected item appears on the top. The Choice class inherits the Component.

Constructor for the Choice class

• Choice() : creates an new empty choice menu .

Different Methods for the Choice Class

Below programs illustrate the Choice class in Java AWT:

• Program to create a simple choice and add elements to it:

  
  

  
  
  

  // Java Program to create a simple  // choice and add elements to it . import java.awt.*; import javax.swing.*;    class choice {        // choice     static Choice c;        // frame     static JFrame f;        // default constructor     choice()     {     }        // Main Method     public static void main(String args[])     {            // create a frame         f = new JFrame("choice");            // create e panel         JPanel p = new JPanel();            // create a choice         c = new Choice();            // add element to the list         c.add("Andrew");         c.add("Arnab");         c.add("Ankit");            // add choice to panel         p.add(c);            // add panel to the frame         f.add(p);            // show the frame         f.show();         f.setSize(300, 300);     } }

  Output :
  

• Program to create a simple choice and add ItemListener to it:

  
  

  
  
  

  // Java  Program to create a simple // choice and add ItemListener to it import java.awt.*; import javax.swing.*; import java.awt.event.*;    class choice implements ItemListener {        // choice     static Choice c;        // frame     static JFrame f;        // label     static Label l;        // default constructor     choice()     {     }        // Main Method     public static void main(String args[])     {            // create a frame         f = new JFrame("choice");            // object         choice ch = new choice();            // create e panel         JPanel p = new JPanel();            // create a choice         c = new Choice();            // add element to the list         c.add("Andrew");         c.add("Arnab");         c.add("Ankit");            // add itemListener to it         c.addItemListener(ch);            // create a label         l = new Label();            // set the label text         l.setText(c.getSelectedItem() + " selected");            // add choice to panel         p.add(c);         p.add(l);            // add panel to the frame         f.add(p);            // show the frame         f.show();         f.setSize(300, 300);     }        // if an item is selected     public void itemStateChanged(ItemEvent e)     {         l.setText(c.getSelectedItem() + " selected");     } }

  Output :

  

• Program to create a choice and manually add elements to it (using add(String s) function):

  
  

  
  
  

  // Java Program to create a choice and // manually add elements to it  // (using add(String s) function) import java.awt.*; import javax.swing.*; import java.awt.event.*;    class choice implements ItemListener, ActionListener {        // choice     static Choice c;        // frame     static JFrame f;        // label     static Label l;        // textfield     static TextField tf;        // default constructor     choice()     {     }        // Main Method     public static void main(String args[])     {            // create a frame         f = new JFrame("choice");            // object         choice ch = new choice();            // create e panel         JPanel p = new JPanel();            // create a choice         c = new Choice();            // add element to the list         c.add("Andrew");            // create a textfield         tf = new TextField(7);            // create a button         Button b = new Button("ok");            // add actionListener         b.addActionListener(ch);            // add itemListener to it         c.addItemListener(ch);            // create a label         l = new Label();         Label l1 = new Label("add names");            // set the label text         l.setText(c.getSelectedItem() + " selected");            // add choice to panel         p.add(c);         p.add(l);         p.add(l1);         p.add(tf);         p.add(b);            // add panel to the frame         f.add(p);            // show the frame         f.show();         f.setSize(250, 300);     }        // if an item is selected     public void itemStateChanged(ItemEvent e)     {         l.setText(c.getSelectedItem() + " selected");     }        // if button is pressed     public void actionPerformed(ActionEvent e)     {         // add item to the choice         c.add(tf.getText());     } }

  Output :

  

Note: The programs might not run in an online IDE please use an offline IDE.

Reference : https://docs.oracle.com/javase/7/docs/api/java/awt/Choice.html