Java版本与Class编译版本号的对应关系

JDK 23 = 67,

JDK 22 = 66,

JDK 21 = 65,

JDK 20 = 64,

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