1# Kotlin
 2
 3Kotlin language support in Zed is provided by the community-maintained [Kotlin extension](https://github.com/zed-extensions/kotlin).
 4Report issues to: [https://github.com/zed-extensions/kotlin/issues](https://github.com/zed-extensions/kotlin/issues)
 5
 6- Tree-sitter: [fwcd/tree-sitter-kotlin](https://github.com/fwcd/tree-sitter-kotlin)
 7- Language Server: [fwcd/kotlin-language-server](https://github.com/fwcd/kotlin-language-server)
 8
 9## Configuration
10
11Workspace configuration options can be passed to the language server via lsp
12settings in `settings.json`.
13
14The full list of lsp `settings` can be found
15[here](https://github.com/fwcd/kotlin-language-server/blob/main/server/src/main/kotlin/org/javacs/kt/Configuration.kt)
16under `class Configuration` and initialization_options under `class InitializationOptions`.
17
18### JVM Target
19
20The following example changes the JVM target from `default` (which is 1.8) to
21`17`:
22
23```json [settings]
24{
25  "lsp": {
26    "kotlin-language-server": {
27      "settings": {
28        "compiler": {
29          "jvm": {
30            "target": "17"
31          }
32        }
33      }
34    }
35  }
36}
37```
38
39### JAVA_HOME
40
41To use a specific java installation, just specify the `JAVA_HOME` environment variable with:
42
43```json [settings]
44{
45  "lsp": {
46    "kotlin-language-server": {
47      "binary": {
48        "env": {
49          "JAVA_HOME": "/Users/whatever/Applications/Work/Android Studio.app/Contents/jbr/Contents/Home"
50        }
51      }
52    }
53  }
54}
55```