Reasons to Migrate to J2SE 5.0 (Tiger)

    void run() {
        List customerList = getCustomerList();
        sendEmailTo(customerList);
    }
    
    private void sendEmailTo(List list) {
        Iterator i = list.iterator();

        while(i.hasNext()) {
            Customer c = (Customer) i.next();
            sendEmailTo(c);
        }
    }

    void run() {
        List<Customer> customerList = getCustomerList();
        sendEmailTo(customerList);
    }
    
    private void sendEmailTo(List<Customer> list) {
        Iterator<Customer> i = list.iterator();

        while(i.hasNext()) {
            Customer c = i.next();
            sendEmailTo(c);
        }
    }

    private void sendEmailTo(List<Customer> list) {
        for(Customer c: list) {
            sendEmailTo(c);
        }
    }

        // create the list of integers
        List listOfInts = new ArrayList();
        for (int i = 0; i < MAX_INT; ++i) {
            Integer aNumber = new Integer(i);
            listOfInts.add(aNumber);
        }

        // retrieve the list of integers and print the sum
        Iterator iterator = listOfInts.iterator();
        int total = 0;
        while(iterator.hasNext()) {
            Integer aNumber = (Integer)iterator.next();
            total = total + aNumber.intValue();
        }
        Integer theTotal = new Integer(total);
        System.out.printf("Total: %d\n", theTotal);

        // create the list of integers
        List<Integer> listOfInts = new ArrayList<Integer>();
        for (int i = 0; i < MAX_INT; ++i) {
            listOfInts.add(i); // autoboxing here
        }
        
        // retrieve the list of integers and print the sum
        int total = 0;
        for(Integer i: listOfInts) {
            total += i; // unboxing here
        }
        System.out.printf("Total: %d\n", total); //autoboxing here

        static final int SMALL = 0;
        static final int MEDIUM = 1;
        static final int LARGE = 2;
        static final int XLARGE = 3;

        int shirtSize = LARGE;

        int shirtSize = 47;

        public enum Size {
            SMALL,
            MEDIUM,
            LARGE,
            XLARGE
        }

        Size shirtSize = Size.LARGE; //but never 47

        Object[] args = new Object[] {new Date(), 5, "Mars"};
        String pattern = "At {0, time, short} on {0, date, short}, we saw {1, number,
                         integer} " + "ships on the planet {2}.";
        String msg = MessageFormat.format(pattern, args);

        Date time = new Date();
        int count = 5;
        String planet = "Mars";

        String pattern = "At {0, time, short} on {0, date, short}, we saw {1, number,
                         integer} " + "ships on the planet {2}.";
        String msg = MessageFormat.format(pattern, time, count, planet);

        double x = Math.tan(45.0);
        double y = Math.pow(3.0, 2.0);

        import static java.lang.Math.*;
        ...
        double x = tan(45.0);
        double y = pow(3.0, 2.0);

        Scanner scan = new Scanner(System.in);

        System.out.print("What is your name? ");
        String name = scan.next();
        
        System.out.print("How old are you? ");
        int age = scan.nextInt();
        
        String msgPattern = "Hi {0}. You are {1} years old.";
        String msg = MessageFormat.format(msgPattern, name, age);
        System.out.println(msg);