Add example project

bindings/java/example/src/main/java/org/github/seonwkim/Main.java

@@ -0,0 +1,27 @@
+package org.github.seonwkim;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.ResultSet;
+import java.sql.Statement;
+
+public class Main {
+  public static void main(String[] args) {
+    try (Connection conn = DriverManager.getConnection("jdbc:sqlite:sample.db")) {
+      Statement stmt =
+          conn.createStatement(
+              ResultSet.TYPE_FORWARD_ONLY,
+              ResultSet.CONCUR_READ_ONLY,
+              ResultSet.CLOSE_CURSORS_AT_COMMIT);
+      stmt.execute("CREATE TABLE users (id INT PRIMARY KEY, username TEXT);");
+      stmt.execute("INSERT INTO users VALUES (1, 'seonwoo');");
+      stmt.execute("INSERT INTO users VALUES (2, 'seonwoo');");
+      stmt.execute("INSERT INTO users VALUES (3, 'seonwoo');");
+      stmt.execute("SELECT * FROM users");
+      System.out.println(
+          "result: " + stmt.getResultSet().getInt(1) + ", " + stmt.getResultSet().getString(2));
+    } catch (Exception e) {
+      System.out.println("Error: " + e);
+    }
+  }
+}