创建一个bash别名以编译当前目录中的任何.java程序

Question

I am attempting to create a bash alias that compiles all files with the .java extension and then runs all the files with the .class extension in the current working directory.

I currently have the alias

alias jcompile="cd $pwd; javac *.java; java *.class"

I would expect this to find any java programs and compile them, and then run them, but it throws this error.

error: file not found: *.java
Usage: javac <options> <source files>
use --help for a list of possible options
Error: Could not find or load main class *.class
Caused by: java.lang.ClassNotFoundException: *.class

Answer 1

Unless you're defining $pwd specifically, it doesn't mean anything. pwd is a command that will tell you your current path, and $PWD is a variable that holds your current path. If you are defining a variable pwd , you might want to change it to something more distinctive.

If you want your function to run in a location that isn't your current directory, you could pass it as an argument:

jcompile() {
  cd "$1"
  javac *.java
  java *.class
}

and run it via

jcompile /my/path/to/directory