String to Integer converstion
String test;
int var;
var = Integer.valueOf(test).intValue();
or
String tmp = "32";
int area = Integer.parseInt(tmp);
(capture number exception).

Integer to String conversion

int i = 567;
String s = Integer.toString(i);

Or
String.valueOf(i).
Or
String s=new String(Integer.toString(i));


if value is not null, display value, else display space
< %= ((vinAttributes.getVehicleModelYear()!= null )? vinAttributes.getVehicleModelYear(): "")% >


Basic toString Reference:
	/**
	 * Converts the object to a string
	 */
	public String toString()
	{
		StringBuffer sb = new StringBuffer();
		String b = "\n";
		sb.append("StreetAddress1: ");
		   sb.append(((getStreetAddress1()==null)?"null":getStreetAddress1().toString()));
		   sb.append(b);
		sb.append("StreetAddress2: ");
		   sb.append(((getStreetAddress2()==null)?"null":getStreetAddress2().toString()));
		   sb.append(b);
		sb.append("StreetAddress3: ");
		   sb.append(((getStreetAddress3()==null)?"null":getStreetAddress3().toString()));
		   sb.append(b);
		sb.append("City: ");
		   sb.append(((getCity()==null)?"null":getCity().toString()));
		   sb.append(b);
		sb.append("State: ");
		   sb.append(((getState()==null)?"null":getState().toString()));
		   sb.append(b);
		sb.append("Zip: ");
		   sb.append(((getZip()==null)?"null":getZip().toString()));
		   sb.append(b);
		sb.append("ZipExtension: ");
		   sb.append(((getZipExtension()==null)?"null":getZipExtension().toString()));
		   sb.append(b);
		return (sb.toString());
	}




Singleton 
	/* Singleton implementation
	private TestGiftCertificateService() {
		super();
	} 
	private static TestGiftCertificateService s_instance;
	   
	public static synchronized TestGiftCertificateService getInstance()
	 {
		 if (s_instance == null)
			 s_instance = new TestGiftCertificateService();
		 return s_instance;
	 }
	*/


Switch for loop
		for (int i = 0; i < params.length; i++) {
			ECSCallEvent call = new ECSCallEvent();
			for (int j = 0; j < params[i].length; j++) {
				switch (j) {
					case 0 :
						call.setCallID(params[i][j]);
						break;
					case 1 :
						call.setReasonCode(params[i][j]);
						break;
					case 2 :
						call.setAutomaticNumberinID(params[i][j]);
						break;
					case 3 :
						call.setMemberID(params[i][j]);
						break;
					case 4 :
						call.setTransferCount(params[i][j]);
						break;
					case 5 :
						call.setTelesetID(params[i][j]);
						break;
					default :
						call.setReservedEUID(params[i][j]);
				}
			}






Process Iterate Map keys
	
	HashMap myMap = new HashMap();
	myMap.putAll(m_sessions);
	m_sessions.clear(); 
	Set keyset = myMap.keySet();
	Iterator iter = keyset.iterator();
	
	while (iter.hasNext()) {
		Long sessionId = (Long)iter.next();
		closeMQSession(sessionId);
		m_sessions.remove(sessionId);
	} 



Ternary Expressions 

Ternary expressions look a little strange at first. However, they can be useful in
making code read better. For example, consider the following code:

  package oreilly.hcj.review;
  public class SyntaxIssues{
    public int someMethod(final Point p) {
      if (p == null) {
        return 0;
      } else {
        return p.x + p.y;
      }
    }
  }

Although this method runs properly, it is unnecessarily wordy. The same thing
could have been accomplished using a much simpler ternary expression:

  package oreilly.hcj.review;
  public class SyntaxIssues {
    public int someElegantMethod(final Point p) {
      return p == null ? 0 : p.x + p.y;
    }
  }