1.jshell gadget introduced jdk9
2. Start jshell
At the command line, type jshell
3. Use jshell
Such as defining a = 10; b = 20; a + b the output results, the following two methods
Method 1: code written in one line, a direct output of the transport
Method 2: Write the code line by line, each completed row of transport continue to write one line
4. Exit jshell
Enter / exit