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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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import java.awt.Button;
import java.awt.Frame;
import java.awt.GridLayout;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.lang.reflect.InvocationTargetException;

/*
 * @test
 * @bug 4307281
 * @summary verify that after setting the echo char to 0 disguises are
 *          removed and user input is echoed to the screen unchanged.
 * @library /java/awt/regtesthelpers
 * @build PassFailJFrame
 * @run main/manual ZeroEchoCharTest
 */

public class ZeroEchoCharTest extends Frame implements ActionListener {
    private final TextField textfield = new TextField();
    private final Button button1 = new Button("Set echo char to *");
    private final Button button2 = new Button("Set echo char to 0");
    static final String INSTRUCTIONS = """
            1.Type in the text field. The user input must be echoed unchanged.
            2.Set echo char to '*' by pressing the corresponding button.
              If all characters in the text field aren't immediately replaced
              with '*', the test fails.
            3.Set echo char to 0 by pressing the corresponding button.
              If disguises in the text field don't immediately revert to
              the original characters, the test fails.
            4.Type in the text field. If the input is echoed unchanged,
              the test passes. Otherwise, the test fails.
            """;

    public ZeroEchoCharTest() {
        button1.addActionListener(this);
        button2.addActionListener(this);

        setLayout(new GridLayout(3, 1));

        add(textfield);
        add(button1);
        add(button2);
        pack();
    }

    public void actionPerformed(ActionEvent event) {
        if (event.getSource() == button1) {
            textfield.setEchoChar('*');
        } else if (event.getSource() == button2) {
            textfield.setEchoChar((char)0);
        }
    }

    public static void main(String[] args) throws InterruptedException,
            InvocationTargetException {
        PassFailJFrame.builder()
                .title("Zero Echo Char Test")
                .testUI(ZeroEchoCharTest::new)
                .instructions(INSTRUCTIONS)
                .rows((int) INSTRUCTIONS.lines().count() + 1)
                .columns(40)
                .build()
                .awaitAndCheck();
    }
}