Java SE 7 New Features

1. Catching multiple exception together:

} catch(IOException | SQLException e) {        //rethrow or logging }

2. Numeric literals with underscores:

To prevent eye misdirection in numbers with multiple zeros,  you can declare these types of numbers as below:

int thousand =  1_000; System.out.println(thousand);

In Java6:

3. Diamond Operator:

You don't have to declare types in both sides:

List<String> list1 = new ArrayList<>();

In Java 6:

4. Automatic resource management:

Connections, Files, Input/OutStreams etc. are auto closed. (java.lang.AutoCloseable).

public void newTry() {        try(FileOutputStream fos = new FileOutputStream("test.txt");            DataOutputStream dos = new DataOutputStream(fos)) {               dos.writeUTF("Java 7 Automatic resource management");        } catch (IOException e) {               // log the exception        }               }

In Java 6:

public void oldTry() {        FileOutputStream fos = null;        DataOutputStream dos = null;        try {               fos = new FileOutputStream("test.txt");               dos = new DataOutputStream(fos);               dos.writeUTF("Java 7 Automatic resource management");        } catch (IOException e) {               // log the exception        } finally {               try {                      fos.close();                      dos.close();               } catch (IOException e) {                      // log the exception               }        } }