Create, Update or Delete Google Calendar in Java

readme.md

Read the complete article on how to create, update and delete Google Calendar in Java: https://blog.aspose.com/2022/05/10/create-update-or-delete-google-calendar-in-java/

create-google-calendar.java

OAuthUser user = new OAuthUser();

// Set clientId, clientSecret and email 
user.clientId = "<<clientID>>"; 
user.clientSecret = "<<clientSecret>>"; 
user.email = "<<email>>";

// You have to retrieve AuthorizationCode manually with generated AuthorizationCodeUrl
// Set authorizationCode
String authorizationCode = "<<authCode>>";

// Copy Code Verifier from the previous step output
// Set codeVerifier
String codeVerifier = "<<codeVerifier>>";

// Get Refresh Token
String refreshToken = GoogleOAuthHelper.getAccessTokenByAuthCode(authorizationCode, codeVerifier, user);
user.refreshToken = refreshToken;

// Get Access Token
String accessToken = GoogleOAuthHelper.getAccessTokenByRefreshToken(user);

// Create Gmail client
try (IGmailClient client = GmailClient.getInstance(accessToken, user.email)) {
    // Insert, get and update calendar
    Calendar calendar = new Calendar("Summary", "Description", "Location", "America/Los_Angeles");

    // Insert calendar and Retrieve same calendar using id
    String id = client.createCalendar(calendar);
}

delete-google-calendar.java

// Create Gmail client
try (IGmailClient client = GmailClient.getInstance(accessToken, email)) {
    // Access and delete calendar with summary starting from "Calendar summary"
    String summary = "Calendar summary";

    // Get calendars list
    ExtendedCalendar[] lst = client.listCalendars();

    for (ExtendedCalendar extCal : lst) {
        // Delete selected calendars
        if (extCal.getSummary().startsWith(summary))
            client.deleteCalendar(extCal.getId());
    }
}

update-google-calendar.java

// Create Gmail client
try (IGmailClient client = GmailClient.getInstance(accessToken, email)) {
    // Specify calendar ID
    String id ="<<calendar ID>>"
      
    // Fetch calendar
    Calendar cal = client.fetchCalendar(id);

    // Change information in the fetched calendar and update calendar
    cal.setDescription("New Description");
    cal.setLocation("New Location");
  
    // Update calendar
    client.updateCalendar(cal);
}