CMD中指定JDK版本命令
问题表述启动jar包时报错，原因是当前本机jdk版本和启动的jar包版本不匹配，找不到类（本地系统是jdk11，jar包是jdk8）
PS D:\ApplicationZIP\MyEclipse 2016\windows-2016-CI-6破解文件\myeclipse2016_keygen> java -jar .\cracker2015.jar
Exception in thread "main" java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)
Caused by: java.lang.ClassNotFoundException: com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel
at java.base/java.net.URLClassLoader.findClass(URLClassLoader.java:471)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:589)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:398)
at java.desktop/javax.swing.SwingUtilities.loadSystemClass(SwingUtilities.java:2036)
at java.desktop/javax.swing.UIManager.setLookAndFeel(UIManager.java:632)
at com.crack.me.active.ui.CrackFrame.main(CrackFrame.java:241)
... 5 more
PS D:\ApplicationZIP\MyEclipse 2016\windows-2016-CI-6破解文件\myeclipse2016_keygen>
解决方案cmd中指定jdk（只在当前cdm中生效，不会影响系统jdk版本）
JAVA_HOME=D:\Java\jdk1.8;
set Path=%JAVA_HOME%\\bin;
java -version
前两项设置jdk，最后一条查看jdk版本