61 lines
1.8 KiB
Java
61 lines
1.8 KiB
Java
// ui/ShowAddListeners.java
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// ©2016 MindView LLC: see Copyright.txt
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// Display the "addXXXListener" methods of any Swing class.
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import javax.swing.*;
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import java.awt.*;
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import java.awt.event.*;
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import java.lang.reflect.*;
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import java.util.regex.*;
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import static onjava.SwingConsole.*;
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public class ShowAddListeners extends JFrame {
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private JTextField name = new JTextField(25);
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private JTextArea results = new JTextArea(40, 65);
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private static Pattern addListener =
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Pattern.compile("(add\\w+?Listener\\(.*?\\))");
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private static Pattern qualifier =
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Pattern.compile("\\w+\\.");
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class NameL implements ActionListener {
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@Override
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public void actionPerformed(ActionEvent e) {
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String nm = name.getText().trim();
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if(nm.length() == 0) {
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results.setText("No match");
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return;
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}
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Class<?> kind;
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try {
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kind = Class.forName("javax.swing." + nm);
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} catch(ClassNotFoundException ex) {
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results.setText("No match");
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return;
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}
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Method[] methods = kind.getMethods();
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results.setText("");
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for(Method m : methods) {
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Matcher matcher =
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addListener.matcher(m.toString());
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if(matcher.find())
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results.append(qualifier.matcher(
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matcher.group(1)).replaceAll("") + "\n");
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}
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}
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}
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public ShowAddListeners() {
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NameL nameListener = new NameL();
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name.addActionListener(nameListener);
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JPanel top = new JPanel();
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top.add(new JLabel("Swing class name (press Enter):"));
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top.add(name);
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add(BorderLayout.NORTH, top);
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add(new JScrollPane(results));
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// Initial data and test:
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name.setText("JTextArea");
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nameListener.actionPerformed(
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new ActionEvent("", 0, ""));
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}
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public static void main(String[] args) {
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run(new ShowAddListeners(), 500, 400);
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}
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}
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