异常信息如下：
C:\Users\Administrator>java -jar -Xmx2000m D:/ha456.jar F:/20160419_1048.dump
Exception in thread "main" java.lang.UnsupportedClassVersionError: com/ibm/jinwoo/heap/HeapAnalyzer : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: com.ibm.jinwoo.heap.HeapAnalyzer. Program will exit.
网上搜罗发现是jdk版本不兼容，如果是jdk7编译生成的class，使用jdk6以下版本运行就会报Unsupported major.minor version 51.0异常
因此，解决办法为使用jdk7或者jdk8运行ha456.jar
参考资料：
Unsupported major.minor version 51.0问题及解决方法
http://nmskate.iteye.com/blog/1839631/
