android { compileSdkVersion 19 buildToolsVersion "19.0.0" defaultConfig { minSdkVersion 7 targetSdkVersion 19 } compileOptions { sourceCompatibility JavaVersion.VERSION_1_7 targetCompatibility JavaVersion.VERSION_1_7 } }
int hex = 0x8; // 16진수 int dec = 8; // 10진수 int oct = 08; // 8진수 int bin = 0b101010; // 2진수
long creditCardNumber = 1234_5678_9012_3456L; long socialSecurityNumber = 999_99_9999L; float pi = 3.14_15F; long hexBytes = 0xFF_EC_DE_5E; long hexWords = 0xCAFE_BABE; long maxLong = 0x7fff_ffff_ffff_ffffL; byte nybbles = 0b0010_0101; long bytes = 0b11010010_01101001_10010100_10010010;
public String getTypeOfDayWithSwitchStatement(String dayOfWeekArg) { String typeOfDay; switch (dayOfWeekArg) { case "Monday": typeOfDay = "Start of work week"; break; case "Tuesday": case "Wednesday": case "Thursday": typeOfDay = "Midweek"; break; case "Friday": typeOfDay = "End of work week"; break; case "Saturday": case "Sunday": typeOfDay = "Weekend"; break; default: throw new IllegalArgumentException("Invalid day of the week: " + dayOfWeekArg); } return typeOfDay; }
Map<String, List<String>> myMap = new HashMap<String, List<String>>();
Map<String, List<String>> myMap = new HashMap<>();
static String readFirstLineFromFileWithFinallyBlock(String path) throws IOException { BufferedReader br = new BufferedReader(new FileReader(path)); try { return br.readLine(); } finally { if (br != null) br.close(); } }
static String readFirstLineFromFile(String path) throws IOException { try (BufferedReader br = new BufferedReader(new FileReader(path))) { return br.readLine(); } }
catch (IOException ex) { logger.log(ex); throw ex; catch (SQLException ex) { logger.log(ex); throw ex; }
catch (IOException|SQLException ex) { logger.log(ex); throw ex; }
“Device implementations that include multiple external storage paths MUST NOT allow Android applications to write to the secondary external storage, except for their package-specific directories on the secondary external storage.”
