JShell Cheatsheet

1514

4 years ago

Jshell is Java’s first official REPL (READ-EVAL-PRINT-LOOP) tool which provides interactive use of Java Programming Language elements.

Variables

When you evaluate any valid java expression, the result will be stored in the system defined variables.

datatype variable name = value;

To list all the declared variables.

/vars
/vars <variableName>
/vars <variableSnippetId>
/vars -start
/vars -all

jshell> /vars
|       String name = "OneCompiler"
|       int id = 1

To list all the declared Methods

/methods
/methods <methodName>
/methods <methodSnippetId>
/methods -start
/methods -all

jshell> /methods
|    double sum(int,int)

To displays classes, interfaces, and enums

/types
/types <typeName>
/types <typeSnippetId>
/types -start
/types -all

To see a list all the snippets

/list
/list -all
/list -start
/list <snippetName>
/list <snippetId>

To save your snippets
```
/save
```
To personalize your startup entries
```
/set start
```
To get help about the list of the JShell commands.
```
/help
```
To edit code of a method
```
/edit method-name
```
To load Code from External Java File into REPL:
```
/open filename.java
```
You can also provide directory information along wwith filename.java if the file is present in different directory like /open c:\\Documents\\filename.java
To Drop a Snippet
```
/drop <snippetName>
/drop <snippetId>
```