Important features of java 7

There are a number of features in Java 7. 

Some of them are listed below-

• diamond operator
• strings in switch statements, 
• multi-catch exception handling, 

 1. Diamond operator
// Old way-

Map<String, List<Moments>> momentsList = new HashMap<String, List<Moments>>();

//New way-

Map<String, List<Moments>> momentsList = new HashMap<>();

2. Strings in switch statements

// Old way-

private void Show(Profile p) {

String status = p.getStatus();

if (status.equalsIgnoreCase(NEW)) {

newProfile(p);

} else if (status.equalsIgnoreCase(OLD)) {

validateProfile(p);

} else if (status.equalsIgnoreCase(PENDING)) {

pendingProfile(p);

}

}

// New Way-

private void Show(Profile p){

    String status = p.getStatus();

    switch(status) {

        caseNEW:

        newProfile(p);

        break;

        caseOLD:

        validateProfile(p);

        break;

        casePENDING:

        pendingProfile(p);

        break;

        default:

            break;

    }

}

3. Exception handling

// Old-

public void oldMultiCatch() {

try {

methodThrowsThreeExceptions();

} catch (Exception1 e) {

// e.getMessage();

} catch (Exception2 e) {

// e.getMessage();

} catch (Exception3 e) {

// e.getMessage();

}

}

// New-

public void newMultiCatch() {

try {

methodThrowsThreeExceptions();

} catch (Exception1 | Exception2 | Exception3 e) {

// log all Exceptions

// e.getMessage();

}

}

4. multi multi-catch

public void multiMultiCatch() {

  try{ 

   methodThrowsThreeExceptions(); 

  } catch(Exception1 e) { 

   // e.getMessage(); 

  } catch(Exception2 | Exception3 e) { 

   // log all Exceptions

   //e.getMessage(); 

   } 

}