- Java & MongoDB Tutorial
- Java & MongoDB - Home
- Java & MongoDB - Overview
- Java & MongoDB - Environment Setup
- Java & MongoDB Examples
- Java & MongoDB - Connect Database
- Java & MongoDB - Show Databases
- Java & MongoDB - Drop Database
- Java & MongoDB - Create Collection
- Java & MongoDB - Drop Collection
- Java & MongoDB - Display Collections
- Java & MongoDB - Insert Document
- Java & MongoDB - Select Document
- Java & MongoDB - Update Document
- Java & MongoDB - Delete Document
- Java & MongoDB - Embedded Documents
- Java & MongoDB - Referenced Documents
- Java & MongoDB - Limiting Records
- Java & MongoDB - Sorting Records
- Java & MongoDB Useful Resources
- Java & MongoDB - Quick Guide
- Java & MongoDB - Useful Resources
- Java & MongoDB - Discussion
Java & MongoDB - Show Databases
To show databases, you can use MongoClient.listDatabaseNames() method to get the name of all the databases.
MongoIterable<String> list = mongoClient.listDatabaseNames(); for (String name : list) { System.out.println(name); }
As we have created an empty database in Connect Database chapter, we need to insert a document to make it visible in mongodb database list.
Example
Following is the code snippet to list down database −
import org.bson.Document; import com.mongodb.client.MongoClient; import com.mongodb.client.MongoClients; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoDatabase; import com.mongodb.client.MongoIterable; public class Tester { public static void main(String[] args) { // Creating a Mongo client MongoClient mongoClient = MongoClients.create("mongodb://localhost:27017"); MongoDatabase database = mongoClient.getDatabase("myDb"); database.createCollection("sampleCollection"); // Retrieving a collection MongoCollection<Document> collection = database.getCollection("sampleCollection"); Document document = new Document("title", "MongoDB") .append("description", "database") .append("likes", 100) .append("url", "http://www.tutorialspoint.com/mongodb/") .append("by", "tutorials point"); //Inserting document into the collection collection.insertOne(document); MongoIterable<String> list = mongoClient.listDatabaseNames(); for (String name : list) { System.out.println(name); } } }
Now, let's compile and run the above program as shown below.
$javac Tester.java $java Tester
Output
On executing, the above program gives you the following output.
admin config local myDb
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