JDK则在 Java1.0 到 Java9 对应每一个版本号 ：JDK1.0、JDK1.2 ... JDK1.8、JDK1.9

Java10以后，JDK对应名称为：JDk10、JDK11、JDK12... JDK17

Java 版本对应的特定 Java 类文件版本号:

JDK 19 = 63
JDK 18 = 62
JDK 17 = 61
JDK 16 = 60
JDK 15 = 59
JDK 14 = 58
JDK 13 = 57
JDK 12 = 56
JDK 11 = 55
JDK 10 = 54
JDK 9 = 53
JDK 8 = 52
JDK 7 = 51
JDK 6.0 = 50
JDK 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45.0-45.6