Java 7 May 2026

// Before: Map<String, List<String>> map = new HashMap<String, List<String>>(); Map<String, List<String>> map = new HashMap<>(); // Diamond Strings in switch String day = "MONDAY"; switch (day) case "MONDAY": System.out.println(1); break; case "TUESDAY": System.out.println(2); break; default: System.out.println(0);

1. Language Changes (Project Coin) Try-with-Resources (AutoCloseable) Automatically closes resources implementing AutoCloseable . java 7

// br automatically closed try // some code catch (SQLException | IOException e) // single block logger.log(e); throw new MyAppException(e); // Before Java 7 BufferedReader br = null;

For parallel processing (divide and conquer). try br = new BufferedReader(new FileReader("file.txt"))

// Before Java 7 BufferedReader br = null; try br = new BufferedReader(new FileReader("file.txt")); br.readLine(); catch (IOException e) e.printStackTrace(); finally { if (br != null) try br.close(); catch (IOException e) {} } // Java 7 try (BufferedReader br = new BufferedReader(new FileReader("file.txt"))) br.readLine(); catch (IOException e) e.printStackTrace();