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• byte

• case

• catch

• char

• class

• continue

• default

• do

• double

• else

• enum

• extends

• final

• finally

• float

• for

• if

• implements

• import

• instanceof

• int

• interface

• long

• native

• new

• package

• private

• protected

• public

• return

• short

• static

• super

• switch

• synchronized

• this

• throw

• throws

• transient

• try

• void

• volatile

• while

The following words are contextual keywords and are only restricted in certain contexts.

• exports

• module

• non-sealed

• open

• opens

• permits

• provides

• record

• requires

• sealed

• to

• transitive

• var

• when

• with

• yield

The following words refer to literal values used by the language.

• true

• false

• null

The following words are reserved as keywords, but currently have no use or purpose.

• const

• goto

• strictfp

| Integers | Integers |

|---|---|

| binary (introduced in Java SE 7) | 0b11110101 ( 0b followed by a binary number) |

| octal | 0365 ( 0 followed by an octal number) |

| hexadecimal | 0xF5 ( 0x followed by a hexadecimal number) |

| decimal | 245 (decimal number) |

| Floating-point values | Floating-point values |

| float | 23.5F , .5f , 1.72E3F (decimal fraction with an optional exponent indicator, followed by F ) |

| float | 0x.5FP0F , 0x.5P-6f ( 0x followed by a hexadecimal fraction with a mandatory exponent indicator and a suffix F ) |

| double | 23.5D , .5 , 5. , 1.72E3D (decimal fraction with an optional exponent indicator, followed by optional D ) |

| double | 0x.5FP0 , 0x.5P-6D ( 0x followed by a hexadecimal fraction with a mandatory exponent indicator and an optional suffix D ) |

| Character literals | Character literals |

| char | 'a' , 'Z' , '\u0231' (character or a character escape, enclosed in single quotes) |

| Boolean literals | Boolean literals |

| boolean | true , false |

| null literal | null literal |

| null reference | null |

| String literals | String literals |

| String | "Hello, World" (sequence of characters and character escapes enclosed in double quotes) |

| Characters escapes in strings | Characters escapes in strings |

| Unicode character | \u3876 ( \u followed by the hexadecimal unicode code point up to U+FFFF) |

| Octal escape | \352 (octal number not exceeding 377, preceded by backslash) |

| Line feed | \n |

| Carriage return | \r |

| Form feed | \f |

| Backslash | \\ |

| Single quote | \' |

| Double quote | \" |

| Tab | \t |

| Backspace | \b |

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