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== Java

=== Class file versions

- Java SE 13 = 57 (0x39 hex)
- Java SE 12 = 56 (0x38 hex)
- Java SE 11 = 55 (0x37 hex)
- Java SE 10 = 54 (0x36 hex)
- Java SE 9 = 53 (0x35 hex)
- Java SE 8 = 52 (0x34 hex)
- Java SE 7 = 51 (0x33 hex)
- Java SE 6.0 = 50 (0x32 hex)
- Java SE 5.0 = 49 (0x31 hex)
- JDK 1.4 = 48 (0x30 hex)
- JDK 1.3 = 47 (0x2F hex)
- JDK 1.2 = 46 (0x2E hex)
- JDK 1.1 = 45 (0x2D hex)