docs/versions/9.3.0/rules/lib/providers/JavaToolchainInfo.mdx

---
title: 'JavaToolchainInfo'
---
Provides access to information about the Java toolchain rule. Accessible as a 'java_toolchain' field on a Target struct.

## Members

* [bootclasspath](#bootclasspath)
* [ijar](#ijar)
* [jacocorunner](#jacocorunner)
* [java_runtime](#java_runtime)
* [jvm_opt](#jvm_opt)
* [label](#label)
* [proguard_allowlister](#proguard_allowlister)
* [single_jar](#single_jar)
* [source_version](#source_version)
* [target_version](#target_version)
* [tools](#tools)

## bootclasspath {#bootclasspath}

```
depset JavaToolchainInfo.bootclasspath
```

The Java target bootclasspath entries. Corresponds to javac's -bootclasspath flag.
## ijar {#ijar}

```
FilesToRunProvider JavaToolchainInfo.ijar
```

A FilesToRunProvider representing the ijar executable.
## jacocorunner {#jacocorunner}

```
FilesToRunProvider JavaToolchainInfo.jacocorunner
```

The jacocorunner used by the toolchain.
May return `None`.
## java_runtime {#java_runtime}

```
JavaRuntimeInfo JavaToolchainInfo.java_runtime
```

The java runtime information.
## jvm_opt {#jvm_opt}

```
depset JavaToolchainInfo.jvm_opt
```

The default options for the JVM running the java compiler and associated tools.
## label {#label}

```
Label JavaToolchainInfo.label
```

The toolchain label.
## proguard_allowlister {#proguard_allowlister}

```
FilesToRunProvider JavaToolchainInfo.proguard_allowlister
```

Return the binary to validate proguard configuration
May return `None`.
## single_jar {#single_jar}

```
FilesToRunProvider JavaToolchainInfo.single_jar
```

The SingleJar deploy jar.
## source_version {#source_version}

```
string JavaToolchainInfo.source_version
```

The java source version.
## target_version {#target_version}

```
string JavaToolchainInfo.target_version
```

The java target version.
## tools {#tools}

```
depset JavaToolchainInfo.tools
```

The compilation tools.