MySQLSyntaxErrorException - Invalid Parameters in Prepared Statement <p>I Have a code Like Below. I have Tried the Other Solutions in stack but nothing seems to be Working. The Java code which generates the Error is as Shown Below.</p> <pre><code>public Connection getConnection() { try { conn = DriverManager.getConnection(CONNSTR, USER, PASS); return conn; } catch (SQLException e) { e.printStackTrace(); return null; } } public boolean AuthenticateUser() { String UserName = "User"; String Password = "Password"; try { PreparedStatement pstmt = null; ResultSet rs = null; conn = getConnection(); String strSQL = "SELECT UserName " + " FROM Users " + " WHERE UserId = ? AND " + " Password = ?"; pstmt = (PreparedStatement) conn.prepareStatement(strSQL); pstmt.setString(1, UserName); pstmt.setString(2, Password); System.out.println(strSQL); rs = pstmt.executeQuery(strSQL); System.out.println(rs.getRow()); rs.last(); int TotalRows = rs.getRow(); System.out.println(TotalRows); if(TotalRows &gt; 0) return true; else return false; } catch (SQLException e) { e.printStackTrace(); return false; } } </code></pre> <p>The Table Structure of the Database is as Given Below</p> <pre><code>CREATE TABLE Users(Id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, UserName VARCHAR(255), UserId VARCHAR(255), Password VARCHAR(255)) </code></pre> <p>The error is As given Below in <a href="https://i.stack.imgur.com/HJUje.jpg" rel="nofollow noreferrer">Image</a> <img src="https://i.stack.imgur.com/HJUje.jpg" alt="enter image description here"></p> <p>The Exception are as Below</p> <pre><code>com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? AND Password = ?' at line 1 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) at com.mysql.jdbc.Util.getInstance(Util.java:386) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568) at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1557) at com.apryll.db.util.dbUtil.AuthenticateUser(dbUtil.java:55) at com.apryll.db.Login.doPost(Login.java:42) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:462) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:395) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:250) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) </code></pre>