无法找到或加载主类,但。类存在

我想编译一堆 .java .jar 文件在此之后 topic ,我以前的GUI程序运行良好。但是,此命令行程序失败!

$ /opt/jdk1.8.0_131/bin/javac -classpath lib/*.jar *.java
$ ls
Module1.class  Cross.class  Ora.java  Safe.class
Module1.java   Cross.java   p1/       Safe.java
lib/           Ora.class      
$ grep main Module1.java
   public static void main(String[] args) {
$ ls lib
jsoup-1.10.3.jar
$ /opt/jdk1.8.0_131/bin/java -classpath .:lib/* Module1
Error: Could not find or load main class Module1