docs/versions/8.2.1/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

```
depset JavaToolchainInfo.bootclasspath
```

The Java target bootclasspath entries. Corresponds to javac's -bootclasspath flag.

## ijar

```
FilesToRunProvider JavaToolchainInfo.ijar
```

A FilesToRunProvider representing the ijar executable.

## jacocorunner

```
FilesToRunProvider JavaToolchainInfo.jacocorunner
```

The jacocorunner used by the toolchain.
May return `None`.

## java\_runtime

```
JavaRuntimeInfo JavaToolchainInfo.java_runtime
```

The java runtime information.

## jvm\_opt

```
depset JavaToolchainInfo.jvm_opt
```

The default options for the JVM running the java compiler and associated tools.

## label

```
Label JavaToolchainInfo.label
```

The toolchain label.

## proguard\_allowlister

```
FilesToRunProvider JavaToolchainInfo.proguard_allowlister
```

Return the binary to validate proguard configuration
May return `None`.

## single\_jar

```
FilesToRunProvider JavaToolchainInfo.single_jar
```

The SingleJar deploy jar.

## source\_version

```
string JavaToolchainInfo.source_version
```

The java source version.

## target\_version

```
string JavaToolchainInfo.target_version
```

The java target version.

## tools

```
depset JavaToolchainInfo.tools
```

The compilation tools.