通过Java发送邮件出问题， 照抄一样代码也不对

我用Idea来写Java，想发邮件去Gmail。 在网上找了一些例子， 出现问题后就直接照抄下来。 但是还是有同样的问题。

提示的错误如下 (两个）：

java.lang.reflect.InvocationTargetException
java.lang.VerifyError: (class: com/sun/mail/handlers/handler_base, method: getTransferData signature: (Ljavax/activation/ActivationDataFlavor;Ljavax/activation/DataSource;)Ljava/lang/Object;) Incompatible argument to function

发送邮件的代码如下：

package seedu.address.logic;

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class EmailSender {

    private String from;
    private String to;
    private String subject;
    private String content;
    private String password;

    /**
     * Create a new Email Sender
     * @param from is sender email address
     * @param to is receiver email address
     * @param subject is the email subject
     * @param content is the email content
     * @param password is the password of sender email
     */
    public EmailSender(String from,
                       String to,
                       String subject,
                       String content,
                       String password) {

        this.from = "tic4003tp5@gmail.com";
        this.to = to;
        this.password = "nusyear4";
        this.subject = subject;
        this.content = content;
    }

    /**
     * Send a email out
     */
    public void sendEmail() {
        // Create a instance for Email
        Properties props = new Properties();
        gmailTls(props);

        // Set MimeMessage
        Message msg = getMimeMessage(props);

        try {
            Transport.send(msg);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * Prepare email MimeMessage
     * @param props email server properties
     * @return MimeMessage
     */
    private Message getMimeMessage(Properties props) {

/*        Session session = Session.getDefaultInstance(props, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(from, password);
            }
        });*/

        Session session = Session.getInstance(props);
        session.setDebug(true);

        MimeMessage msg = new MimeMessage(session);


        try {
            // Set sender email address
            msg.setFrom(new InternetAddress(from));
            // Set receiver email address
            msg.addRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));
            // Set email subject
            msg.setSubject(subject);
            // Set email content
            msg.setContent(content, "text/html;charset=UTF-8");
        } catch (MessagingException e) {
            e.printStackTrace();
        }

        return msg;
    }

    private static void gmailTls(Properties props) {
        props.setProperty("mail.smtp.auth", "true");
        props.setProperty("mail.smtp.ssl.enable", "true");
        props.setProperty("mail.smtp.starttls.enable", "true");
        props.setProperty("mail.transport.protocol", "smtp");
        props.setProperty("mail.smtp.host", "smtp.gmail.com");
        props.setProperty("mail.smtp.port", "587");
    }
}

Build.gradle代码如下：

plugins {
    id 'java'
    id 'checkstyle'
    id 'com.github.johnrengelman.shadow' version '4.0.4'
    id 'application'
    id 'jacoco'
}

mainClassName = 'seedu.address.Main'

sourceCompatibility = JavaVersion.VERSION_11
targetCompatibility = JavaVersion.VERSION_11

repositories {
    mavenCentral()
    maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' }
}

checkstyle {
    toolVersion = '8.29'
}

test {
    useJUnitPlatform()
    finalizedBy jacocoTestReport
}

task coverage(type: JacocoReport) {
    sourceDirectories.from files(sourceSets.main.allSource.srcDirs)
    classDirectories.from files(sourceSets.main.output)
    executionData.from files(jacocoTestReport.executionData)
    afterEvaluate {
        classDirectories.from files(classDirectories.files.collect {
            fileTree(dir: it, exclude: ['**/*.jar'])
        })
    }
    reports {
        html.enabled = true
        xml.enabled = true
    }
}

dependencies {
    String jUnitVersion = '5.4.0'
    String javaFxVersion = '11'

    implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'win'
    implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'mac'
    implementation group: 'org.openjfx', name: 'javafx-base', version: javaFxVersion, classifier: 'linux'
    implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'win'
    implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'mac'
    implementation group: 'org.openjfx', name: 'javafx-controls', version: javaFxVersion, classifier: 'linux'
    implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'win'
    implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'mac'
    implementation group: 'org.openjfx', name: 'javafx-fxml', version: javaFxVersion, classifier: 'linux'
    implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'win'
    implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'mac'
    implementation group: 'org.openjfx', name: 'javafx-graphics', version: javaFxVersion, classifier: 'linux'
    implementation group: 'com.fasterxml.jackson.core', name: 'jackson-databind', version: '2.7.0'
    implementation group: 'com.fasterxml.jackson.datatype', name: 'jackson-datatype-jsr310', version: '2.7.4'

    testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter-api', version: jUnitVersion
    testRuntimeOnly group: 'org.junit.jupiter', name: 'junit-jupiter-engine', version: jUnitVersion

    compile 'com.sun.mail:android-mail:1.5.5'
    compile 'com.sun.mail:android-activation:1.5.5'

    compile 'javax.mail:javax.mail-api:1.6.2'
    compile 'com.sun.mail:javax.mail:1.6.2'
    testCompile 'junit:junit:4.12'
}

shadowJar {
    archiveBaseName = 'teamcontact24-7-v1.4'
}

defaultTasks 'clean', 'test'

run {
    enableAssertions = true
}