writePDFToResponse

 private void writePDFToResponse(HttpServletResponse response, PdfPTable pdfTable, PdfPTable resTable, String fileName) throws IOException, DocumentException {
        Document document = new Document(PageSize.A4.rotate());
        document.setPageSize(PageSize.A4);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        PdfWriter.getInstance(document, baos);
        document.open();
        document.add(pdfTable);
        document.add(resTable);
        document.close();

        response.setCharacterEncoding("UTF-8");
        String content = new String("application/pdf".getBytes(),"UTF-8");
        response.setContentType(content);
        response.setHeader("Expires", "0");
        response.setHeader("Cache-Control","must-revalidate, post-check=0, pre-check=0");
        response.setHeader("Pragma", "public");
        response.setHeader("Content-disposition", "attachment;filename="+ fileName + ".pdf");
        response.setContentLength(baos.size());

        System.out.print(response.getCharacterEncoding());

        ServletOutputStream out = response.getOutputStream();
        baos.writeTo(out);
        out.flush();
    }

sms api

      Date st= new Date();
       URL myURL = new URL("http://www.resalty.net/api/sendSMS.php?userid=YYYYYYY&password=XXXXXXXX&sender=XXX&to=966530XXXX&msg=Test"+st.toString());
    URLConnection myURLConnection = myURL.openConnection();
    myURLConnection.connect();
    myURLConnection.getContent();

java.util.ConcurrentModificationException

 for(DbtDebtVchrSum com:this.companySummary)
        {
            if(com.getTotalDebit().compareTo(com.getPayment())==0)
              rmvList.add(com);
        }
       
       
        for(DbtDebtVchrSum com:rmvList)
        {
            this.companySummary.remove(com);
        }

JPA Custom Query

    Query q1 = em.createQuery("SELECT e.name, e.salary FROM Employee e");
    List<Object[]> result1 = q1.getResultList();
    for (Object[] resultElement : result1) {
        String name = (String)resultElement[0];
        Double salary = (Double)resultElement[1];
        ...
    }

    Query q2 = em.createQuery("SELECT e.name, e.salary, e.department FROM Employee e");
    List<Object[]> result2 = q2.getResultList();
    for (Object[] resultElement : result2) {
        String name = (String)resultElement[0];
        Double salary = (Double)resultElement[1];
        Department dept = (Department)resultElement[2];
        ...
    }

    Query q3 = em.createQuery("SELECT COUNT(e), SUM(e.salary) FROM Employee e");
    Object[] result3 = (Object[])q3.getSingleResult();
    Long count = (Long)result3[0];
    Double sum = (Double)result3[1];

Oracle Flash Back Query

SELECT *
FROM TABLE
AS OF TIMESTAMP TO_TIMESTAMP('18-JUN-13 10.00.00.000000')

Oracle JDBC Mapping

SQL and PL/SQL Data Type	Oracle Mapping	JDBC Mapping
CHAR, CHARACTER, LONG, STRING, VARCHAR, VARCHAR2	oracle.sql.CHAR	java.lang.String
NCHAR, NVARCHAR2	oracle.sql.NCHAR (note 1)	oracle.sql.NString (note 1)
NCLOB	oracle.sql.NCLOB (note 1)	oracle.sql.NCLOB (note 1)
RAW, LONG RAW	oracle.sql.RAW	byte[]
BINARY_INTEGER, NATURAL, NATURALN, PLS_INTEGER, POSITIVE, POSITIVEN,SIGNTYPE, INT, INTEGER	oracle.sql.NUMBER	int
DEC, DECIMAL, NUMBER, NUMERIC	oracle.sql.NUMBER	java.math.BigDecimal
DOUBLE PRECISION, FLOAT	oracle.sql.NUMBER	double
SMALLINT	oracle.sql.NUMBER	int
REAL	oracle.sql.NUMBER	float
DATE	oracle.sql.DATE	java.sql.Timestamp
TIMESTAMP TIMESTAMP WITH TZ TIMESTAMP WITH LOCAL TZ	oracle.sql.TIMESTAMP oracle.sql.TIMESTAMPTZ oracle.sql.TIMESTAMPLTZ	java.sql.Timestamp
INTERVAL YEAR TO MONTH INTERVAL DAY TO SECOND	String (note 2)	String (note 2)
ROWID, UROWID	oracle.sql.ROWID	oracle.sql.ROWID
BOOLEAN	boolean (note 3)	boolean (note 3)
CLOB	oracle.sql.CLOB	java.sql.Clob
BLOB	oracle.sql.BLOB	java.sql.Blob
BFILE	oracle.sql.BFILE	oracle.sql.BFILE
Object types	Generated class	Generated class
SQLJ object types	Java class defined at type creation	Java class defined at type creation
OPAQUE types	Generated or predefined class (note 4)	Generated or predefined class (note 4)
RECORD types	Through mapping to SQL object type (note 5)	Through mapping to SQL object type (note 5)
Nested table, VARRAY	Generated class implemented usingoracle.sql.ARRAY	java.sql.Array
Reference to object type	Generated class implemented usingoracle.sql.REF	java.sql.Ref
REF CURSOR	java.sql.ResultSet	java.sql.ResultSet
Index-by tables	Through mapping to SQL collection (note 6)	Through mapping to SQL collection (note 6)
Scalar (numeric or character) Index-by tables	Through mapping to Java array (note 7)	Through mapping to Java array (note 7)

Tomcat as Windows service

 service.bat install <service_name>

XML submit

HttpPost httppost = new HttpPost(SERVICE_EPR);          
StringEntity se = new StringEntity(SOAPRequestXML,HTTP.UTF_8);

se.setContentType("text/xml");  
httppost.setHeader("Content-Type","application/soap+xml;charset=UTF-8");
httppost.setEntity(se);  

HttpClient httpclient = new DefaultHttpClient();
BasicHttpResponse httpResponse = 
    (BasicHttpResponse) httpclient.execute(httppost);

response.put("HTTPStatus",httpResponse.getStatusLine().toString());

Generate CSR File glassfish /Java

keytool -keysize XXXXX -genkey -alias XXXXXX -keyalg XXX  -keystore keystore.jks -keypass XXXXX -storepass XXXXX

keytool -certreq -alias XXXXXX -keystore keystore.jks -storepass XXXX -keypass XXXX -file server.csr