linux运维交流学习

$ java HelloWorld 报错如下： Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld (wrong name: hello/Hello) at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoa...

1。下载jdk 2。sudo mkdir -p /usr/lib/jvm ; sudo mv ~/Downloads/jdk1.7.0_80 /usr/lib/jvm/ 3.vim /etc/profile 在文件末尾添加下面内容 export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_80 export JRE_HOME=/usr/lib/jvm/jdk1.7.0...