major

Partial GC、Minor GC/Young GC、Major GC/Old GC、Mixed GC、Full GC 的含义，详见书籍《深入理解Java虚拟机（第3版）》第77页 来源： https://www.cnblogs.com/cag2050/p/12392109.html

今天@Test时项目出现了Error，如下 java.lang.UnsupportedClassVersionError: org/apache/ibatis/session/SqlSessionFactoryBuilder : Unsupported major.minor version 52.0 at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:800) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:449) at java.net.URLClassLoader.access$100(URLClassLoader.java:71) at java.net.URLClassLoader$1.run(URLClassLoader.java:361) at java.net.URLClassLoader$1.run(URLClassLoader.java:355) at java.security

Full GC、Minor GC和Major GC的区别 Minor GC：发生在新生代的垃圾收集动作，因为JAVA对象大部分都具备朝生夕灭的特效，所以Minor GC会比较频繁且回收速度比较快 Major GC/Full GC 指发生在老年代的垃圾回收动作，出现Major经常会出现一次Minor GC，Major GC的速度一般会比Minor GC 慢10倍 来源： https://www.cnblogs.com/jakaBlog/p/11767894.html

1、本人因为要在设置好全局jdk为1.7的linux服务器上启动一个用springboot2.0（要求jdk1.8及以上）的jar包项目，出现了下面的异常：Exception in thread "main" java.lang.UnsupportedClassVersionError: org/springframework/boot/loader/JarLauncher : Unsupported major.minor version 52.0 Exception in thread "main" java . lang . UnsupportedClassVersionError : org / springframework / boot / loader / JarLauncher : Unsupported major . minor version 52.0 at java . lang . ClassLoader . defineClass1 ( Native Method ) at java . lang . ClassLoader . defineClass ( ClassLoader . java : 800 ) at java . security . SecureClassLoader . defineClass ( SecureClassLoader