java code

package egtry.mongo;

import java.util.Set;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.Mongo;

public class MongoTest {


	public static void main(String[] args) throws Exception {
		Mongo conn=new Mongo("localhost", 27017);
		DB db=conn.getDB("egtry");
		Set<String> colls=db.getCollectionNames();
		for(String name: colls) {
			System.out.println(name);
		}
		
		DBCollection coll=db.getCollection("collection1");
		DBCursor cursor=coll.find();
		while(cursor.hasNext()) {
			System.out.println(cursor.next());
		}
	}

}

Output

coll1
collection1
system.indexes
{ "_id" : { "$oid" : "4f5984992f88e0a711b6494f"} , "path" : "/egtry/java" , "title" : "hello"}