DELEGATION MODEL

10. Java Program to Create and Set Border to Push Buttons

            import java.awt.*;
            import java.awt.event.ActionEvent;
            import java.awt.event.ActionListener;
            
            public class MultiSelectListBoxApp extends Frame {
            
                private List itemList;
                private TextArea displayArea;
            
                public MultiSelectListBoxApp() {
                    // Set up the frame
                    setTitle("Multi-Select List Box Example");
                    setSize(400, 400);
                    setLayout(new FlowLayout());
            
                    // Initialize the List with multiple selection enabled
                    itemList = new List(5, true); // 5 visible rows, multiple selection enabled
                    itemList.add("Item 1");
                    itemList.add("Item 2");
                    itemList.add("Item 3");
                    itemList.add("Item 4");
                    itemList.add("Item 5");
            
                    // Add a button to display selected items
                    Button displayButton = new Button("Display Selected Items");
                    displayButton.addActionListener(new ActionListener() {
                        
                        public void actionPerformed(ActionEvent e) {
                            displaySelectedItems();
                        }
                    });
            
                    // TextArea to show selected items
                    displayArea = new TextArea(5, 30);
                    displayArea.setEditable(false);
            
                    // Add components to the frame
                    add(itemList);
                    add(displayButton);
                    add(displayArea);
            
                    // Set up close operation
                    addWindowListener(new java.awt.event.WindowAdapter() {
                        
                        public void windowClosing(java.awt.event.WindowEvent windowEvent) {
                            System.exit(0);
                        }
                    });
                }
            
                private void displaySelectedItems() {
                    // Get selected items and display them in the TextArea
                    String[] selectedItems = itemList.getSelectedItems();
                    StringBuilder sb = new StringBuilder("Selected Items:
            ");
                    for (String item : selectedItems) {
                        sb.append(item).append("
            ");
                    }
                    displayArea.setText(sb.toString());
                }
            
                public static void main(String[] args) {
                    // Create and show the frame
                    MultiSelectListBoxApp app = new MultiSelectListBoxApp();
                    app.setVisible(true);
                }
            }
        

OUTPUT