A REPL
type /exit to quit
Requires Java 9+, use –class-path to add libraries to jshell to be able to create those objects.
PS C:\devtools> java -version
java version "11.0.12" 2021-07-20 LTS
Java(TM) SE Runtime Environment 18.9 (build 11.0.12+8-LTS-237)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11.0.12+8-LTS-237, mixed mode)
PS C:\devtools> jshell
| Welcome to JShell -- Version 11.0.12
| For an introduction type: /help intro
jshell> /env --class-path c
commons-collections4-4.4-bin.zip commons-collections4-4.4/
<press tab again to see synopsis>
jshell> /env --class-path commons-collections4-4.4/c
commons-collections4-4.4-javadoc.jar commons-collections4-4.4-sources.jar
commons-collections4-4.4-test-sources.jar commons-collections4-4.4-tests.jar
commons-collections4-4.4.jar
<press tab again to see synopsis>
jshell> /env --class-path commons-collections4-4.4/commons-collections4-4.4.jar
| Setting new options and restoring state.
jshel
jshell> import org.apache.commons.collections4.*
jshell> Bag b = new Ha
HashMap( HashSet( Hashtable(
jshell> Bag b = new HashBag();
| Error:
| cannot find symbol
| symbol: class HashBag
| Bag b = new HashBag();
| ^-----^
jshell> import org.apache.commons.collections4.bag.HashBag
jshell> Bag b = new HashBag();
b ==> []
jshell> b.add
add( addAll(
jshell> b.add(
b
Signatures:
boolean Bag<E>.add(E)
boolean Bag<E>.add(E, int)
<press tab again to see documentation>
jshell> b.add("FOO", 10);
| Warning:
| unchecked call to add(E,int) as a member of the raw type org.apache.commons.collections4.Bag
| b.add("FOO", 10);
| ^--------------^
$4 ==> true
/save filename.jsh to save commands in a file for later use
/open filename.jsh to open a local file again
/vars to display all the variables in scope