// Exemples catagorie lexical "integer literal" Java7 ou plus
public class JavaConst {  
  public static void main(String[] args) {
    long carteBleu  = 1234_5678_9012_3456L; // decimal long
    long numSecu    = 1_62_09_63_075_523L;  // decimal long
    long hexaBytes  = 0x0F_EC_DE_5E;        // hexadecimal
    long hexaWords  = 0xCAFE_BABE;          // hexadecimal (valid JVM files identification)
    long hexaWord2  = 0xB16_B00B5;          // hexadecimal porno!
    long hexaWord3  = 0xC0DE_BAB1BEL;       // hexadecimal long (5 octet)
    byte byteBinary = 0B0010_0101;          // binaire
    long longBinary = 0b11010010_01101001_10010100_10010010; // binaire long
    long maxlong    = 0X7fff_ffff_ffff_ffffL;                // hexadecimal long
    long maxlong2   = 07_77777_77777_77777_77777L;           // octal long
    long moins1     = 0xffff_ffff_ffff_ffffL;                // hexadecimal long negatif =-1
    int  moins1bis  = 03_77777_77777;                        // octal 4 octets =-1
    int  moinsDix   = -10;        // "10" constante decimal, "-" operateur au niveau syntaxique
    int  plusdix    = +10;        // "10" constante decimal, "+" operateur au niveau syntaxique
    int  zero       = 0;          // 0 decimal
    long zerobis    = 0l;         // 0 decimal long !
    int  zeroter    = 00;         // 0 octal
    int  zerooooo = 0__________0; // 0 octal (un peu long)
    int  dix      = 1__________0; // 10 decimal
    int  add = 12_3 + 5_4_3;      // add= 666

    short[] HAPPY_FACE = {  // bitmap binaire
      (short)0b0000011111100000,
      (short)0b0000100000010000,
      (short)0b0001000000001000,
      (short)0b0010000000000100,
      (short)0b0100000000000010,
      (short)0b1000011001100001,
      (short)0b1000011001100001,
      (short)0b1000000000000001,
      (short)0b1000000000000001,
      (short)0b1001000000001001,
      (short)0b1000100000010001,
      (short)0b0100011111100010,
      (short)0b0010000000000100,
      (short)0b0001000000001000,
      (short)0b0000100000010000,
      (short)0b0000011111100000
    };
/* Contre Exemples (verifiés avec compilo javac)
  int x1 = _52;     // It is an identifier, not a numeric literal
  int x2 = 5_2;     // OK (decimal literal)
  int x3 = 52_;     // Invalid; cannot put underscores at the end of a literal
  int x4 = 5_____2; // OK (decimal literal)
  int x5 = 0_x52;   // Invalid; cannot put underscores in the 0x radix prefix
  int x6 = 0x_52;   // Invalid; cannot put underscores at the beginning of a number
  int x7 = 0x5_2;   // OK (hexadecimal literal)
  int x8 = 0x52_;   // Invalid; cannot put underscores at the end of a number
  int x9 = 0_52;    // OK (octal literal). for octal 0 is the beginning of number !!
  int x10 = 05_2;   // OK (octal literal)
  int x11 = 052_;   // Invalid; cannot put underscores at the end of a number
  int x12 = 08;     // Invalid : not decimal, not octal
  int x13 = 07;     // OK octal
  long x14 = 0x0B16_B00B_BABE_L; // Invalid :cannot put underscores at the end of a number
*/
  }
}