2 minutes to read - Apr 12, 2023

Refactor code

This component seems too complex, how would you simplify it? package standalone; import java.awt.*; import java.awt.event.*; /** * NameEntry.java */ public class NameEntry extends Frame { public NameEntry() { super("Name Entry"); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {System.exit(0);} }); Label label = new Label("Name"); TextField name = new TextField(20); add(label, BorderLayout.WEST); add(name, BorderLayout.CENTER); name.addActionListener(new NameHandler()); pack(); } public static void main(String[] args) { NameEntry f = new NameEntry(); f.setVisible(true); } } // NameEntry class NameHandler implements ActionListener { public void actionPerformed(ActionEvent evt) { System.out.println("Name was: " + evt.getActionCommand()); } }

Here's an example of how you can simplify the `NameEntry` class:

Copy code

`import java.awt.*; import java.awt.event.*; public class NameEntry extends Frame { public NameEntry() { super("Name Entry"); addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); Label label = new Label("Name"); TextField name = new TextField(20); add(label, BorderLayout.WEST); add(name, BorderLayout.CENTER); name.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent evt) { System.out.println("Name was: " + evt.getActionCommand()); } }); pack(); } public static void main(String[] args) { NameEntry f = new NameEntry(); f.setVisible(true); } }`

We can simplify the `NameEntry` class by:

1. Removing the `NameHandler` class and instead implementing the `ActionListener` interface directly in the anonymous inner class.

2. Removing the `windowClosing` method of the `WindowAdapter` and replacing it with a lambda expression.

This results in a more concise and readable implementation of the `NameEntry` class.

I hope this helps! Let me know if you have any questions.

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