Literal Formats for Integers

Java Tutorials - Herong's Tutorial Examples

∟Literal Formats for Integers - Example

This section provides a tutorial example on how to use integer literals in 4 formats: decimal, hex, octal and binary.

Now let's see a tutorial program example on integer literals in decimal, hex, octal and binary formats:

/* IntegerLiteral.java
 * Copyright (c) HerongYang.com. All Rights Reserved.
 */

class IntegerLiteral {
   public static void main(String[] a) {
      java.io.PrintStream o = System.out;
      o.println("Decimal Integer Literals:");
      o.println("   int value:              911  = "+911);
      o.println("   int high:        2147483647  = "+2147483647);
      o.println("   long value:      2147483648L = "+2147483648L);
      o.println("   Using _:      2_147_483_648L = "+2_147_483_648L);

      o.println();
      o.println("Hex Integer Literals:");
      o.println("   Hex format:           0x38F  = "+0x38F);
      o.println("   Leading 0:       0x0000038F  = "+0x0000038F);
      o.println("   int max value:   0x7FFFFFFF  = "+0x7FFFFFFF);
      o.println("   long value:      0x7FFFFFFFL = "+0x7FFFFFFFL);
      o.println("   int min value:   0x80000000  = "+0x80000000);
      o.println("   long value:      0x80000000L = "+0x80000000L);
      o.println("   int -1 value:    0xFFFFFFFF  = "+0xFFFFFFFF);
      o.println("   long value:      0xFFFFFFFFL = "+0xFFFFFFFFL);
      o.println("   Using _:        0xDead_Deed  = "+0xDead_Deed);
      o.println("   long value:     0xDead_DeedL = "+0xDead_DeedL);

      o.println();
      o.println("Octal Integer Literals:");
      o.println("   Octal format:         01617  = "+01617);
      o.println("   int max value: 017777777777  = "+017777777777);
      o.println("   long value:    017777777777L = "+017777777777L);
      o.println("   int min value: 020000000000  = "+020000000000);
      o.println("   long value:    020000000000L = "+020000000000L);
      o.println("   Using _:     0200_0000_0000  = "+0200_0000_0000);
      o.println("   long octal:  0200_0000_0000L = "+0200_0000_0000L);

      o.println();
      o.println("Binary Integer Literals:");
      o.println("   Octal format:  0b1110001111  = "+0b1110001111);
      o.println("   int min value:"
         +" 0b1000_0000_0000_0000_0000_0000_0000_0000  = "
         +0b1000_0000_0000_0000_0000_0000_0000_0000);
   }
}

Compile this example program in a command window and run it:

herong> javac IntegerLiteral.java

herong> java IntegerLiteral

Decimal Integer Literals:
   int value:              911  = 911
   int high:        2147483647  = 2147483647
   long value:      2147483648L = 2147483648
   Using _:      2_147_483_648L = 2147483648

Hex Integer Literals:
   Hex format:           0x38F  = 911
   Leading 0:       0x0000038F  = 911
   int max value:   0x7FFFFFFF  = 2147483647
   long value:      0x7FFFFFFFL = 2147483647
   int min value:   0x80000000  = -2147483648
   long value:      0x80000000L = 2147483648
   int -1 value:    0xFFFFFFFF  = -1
   long value:      0xFFFFFFFFL = 4294967295
   Using _:        0xDead_Deed  = -559030547
   long value:     0xDead_DeedL = 3735936749

Octal Integer Literals:
   Octal format:         01617  = 911
   int max value: 017777777777  = 2147483647
   long value:    017777777777L = 2147483647
   int min value: 020000000000  = -2147483648
   long value:    020000000000L = 2147483648
   Using _:     0200_0000_0000  = -2147483648
   long octal:  0200_0000_0000L = 2147483648

Binary Integer Literals:
   Octal format:  0b1110001111  = 911
   int min value: 0b1000_0000_0000_0000_0000_0000_0000_0000
      = -2147483648