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New syntax elements of java 7
The document outlines new features in Java 7, including binary literals, underscores in numerical literals, and enhanced switch statements. It discusses improvements such as the diamond operator, multi-catch blocks, and try-with-resources for better resource management. Additionally, it presents information about Orange & Bronze Software Labs, a Filipino company specializing in Java technology consulting and training.
New syntax elements of java 7
- 1. Java 7 MaxRamos Associate Software Engineer, Orange & Bronze Software Labs Oracle Certified Professional (Java SE 6 Programmer)
- 2. Overview Binary LiteralsUnderscore in Numerical Literals String in switch statement Diamond operator Multi-catch Try-with-resources
- 3.
- 4. Before Java 7int decimal = 100; int octal = 010; // decimal 8 int hexadecimal = 0x1f; // decimal 31
- 5. In Java 7int b = 0b100; // decimal 2 or int b = 0B100;
- 6. Underscore in numericalliterals
- 7. Before Java 7long largeNumber = 94158725; long manyZeroes = 100000000;
- 8. In Java 7long largeNumber = 94_158_725; long manyZeroes = 100_000_000;
- 9. In Java 7int i = 1000; int j = 1_000; if (I == j) { // true } or If (1000 == 1_000) { // true }
- 10. String in switchstatement
- 11. Before Java 7if (size.equals(“Short”)) { // do something } else if (size.equals(“Tall”)) { // do something } else if (size.equals(“Grande”)) { // do something } else if (size.equals(“Venti”)) { // do something } else { // do something }
- 12. In Java 7switch (size) { case “Short”: // do something case “Tall”: // do something case “Grande”: // do something case “Venti”: // do something default: // do something }
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- 14. Before Java 7List<String> list = new ArrayList<String>(); Set<Integer> set = new HashSet<Integer>(); Map<String, Object> map = new HashMap<String, Object>();
- 15. In Java 7List<String> names = new ArrayList<>(); Set<Integer> count = new HashSet<>(); Map<String, Object> map = new HashMap<>();
- 16.
- 17. Before Java 7try { // do something that might throw an exception } catch (ParseException e) { // do something } catch (IOException e) { // do that same thing again }
- 18. In Java 7try { // do something that might throw an exception } catch (ParseException | IOException e) { // do something }
- 19.
- 20. Before Java 7public int methodName(String path) throws IOException { FileReader fr = new FileReader(path); try { return fr.read() } finally { if (fr != null) fr.close(); } }
- 21. In Java 7public int methodName(String path) throws IOException { try (FileReader fr = new FileReader(path)){ return fr.read() } }
- 22. In Java 7public void methodName(String path) throws IOException { try ( FileReader fr = new FileReader(path); FileWriter fw = new FileWriter(“out.txt”) ){ int i = fr.read(); fw.write(i); } }
- 23. About Orange &Bronze Software Labs Filipino software development company specializing in Java technology Consulting, outsourcing, and offshore product development services using Open Source technologies, with a specialization in the Spring and Grails frameworks Enterprise solutions with Google enterprise products and business intelligence solutions with the Pentaho BI Suite Offers Java, Agile and Android training courses www.orangeandbronze.com
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