When we compile our Java programs, each generated .class file carries a major version that indicates which Java version was used during compilation. For example, if we compile our code using Java 21 (major version 65), and then run the class file on an environment with an older Java version, we will encounter the error: […]
When we compile our Java programs, each resulting .class file contains a major version number. For example, if we compile our code with Java 17 (major version 61), and then try to run the class file on Java 16 or earlier, we will encounter the error: Unsupported class file major version 61. This situation often […]
This article shows all the major version of the Java class file, for example, Java 17 (61), Java 11 (55), and Java 8 (52).
Find the major version of the Java class file, and we will know which JDK version compiled the Java class. Below are some popular Java LTS released and their major version numbers. Java SE Major Version Hex 17 61 0x3D 11 55 0x37 8 52 0x34 If the major version of the Java class file […]
