Add opentelemetry.io docs

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+---
+title: "Java"
+weight: 18
+description: >
+  <img width="35" src="https://raw.github.com/open-telemetry/opentelemetry.io/main/iconography/32x32/Java_SDK.svg"></img>
+  A language-specific implementation of OpenTelemetry in Java.
+---
+
+**Note**: As of 3/29 this is a copy of the documentation live on opentelemetry.io, and requires updates to become current with the current Java release.
+
+OpenTelemetry Java consists of the following repositories:
+
+- [opentelemetry-java](https://github.com/open-telemetry/opentelemetry-java):
+  Components for manual instrumentation including API and SDK as well as
+  extensions, the OpenTracing shim and examples.
+- [opentelemetry-java-instrumentation](https://github.com/open-telemetry/opentelemetry-java-instrumentation):
+  Built on top of opentelemetry-java and provides a Java agent JAR that can be
+  attached to any Java 8+ application and dynamically injects bytecode to
+  capture telemetry from a number of popular libraries and frameworks.
+- [opentelemetry-java-contrib](https://github.com/open-telemetry/opentelemetry-java-contrib):
+  Provides helpful libraries and standalone OpenTelemetry-based utilities that
+  don't fit the express scope of the OpenTelemetry Java or Java Instrumentation
+  projects. For example, JMX metric gathering.
+
+## opentelemetry-java
+
+| Traces | Metrics | Logs         |
+| ------ | ------- | ------------ |
+| Beta   | Alpha   | Experimental |
+
+### Components
+
+- Tracing API
+- Tracing SDK
+- Metrics API
+- Metrics SDK
+- OTLP Exporter
+- Jaeger Trace Exporter
+- Zipkin Trace Exporter
+- Prometheus Metric Exporter
+- Context Propagation
+- OpenTracing Bridge
+- OpenCensus Bridge
+
+### Releases
+
+Published releases are available on maven central.
+
+#### Maven
+
+```xml
+  <dependencies>
+    <dependency>
+      <groupId>io.opentelemetry</groupId>
+      <artifactId>opentelemetry-api</artifactId>
+      <version>0.10.0</version>
+    </dependency>
+  </dependencies>
+```
+
+#### Gradle
+
+```groovy
+dependencies {
+	implementation('io.opentelemetry:opentelemetry-api:0.10.0')
+}
+```
+
+#### Other
+
+  - [releases](https://github.com/open-telemetry/opentelemetry-java/releases)
+  - [maven](https://mvnrepository.com/artifact/io.opentelemetry)
+  - [bintray](https://bintray.com/open-telemetry/maven/opentelemetry-java)
+
+### Additional Information
+
+- [Javadoc](https://www.javadoc.io/doc/io.opentelemetry)
+- [Example code](https://github.com/open-telemetry/opentelemetry-java/tree/main/examples)
+
+## opentelemetry-java-instrumentation
+
+| Traces | Metrics | Logs         |
+| ------ | ------- | ------------ |
+| Beta   | Alpha   | Experimental |
+
+### Releases
+
+> Published releases are *NOT* available on maven central, but will be by GA.
+
+  - [releases](https://github.com/open-telemetry/opentelemetry-java-instrumentation/releases)
+  - [bintray](https://bintray.com/open-telemetry/maven/opentelemetry-java-instrumentation)
+
+> Snapshots are also available as documented
+> [here](https://github.com/open-telemetry/opentelemetry-java/blob/main/CONTRIBUTING.md#snapshots).
+
+### Additional Information
+
+- [Javadoc](https://www.javadoc.io/doc/io.opentelemetry)
+- [Example code](https://github.com/open-telemetry/opentelemetry-java/tree/main/examples)
+
+## opentelemetry-java-contrib
+
+| Component         | Status |
+| ----------------- | ------ |
+| JMX Metric Gather | Alpha  |
+
+### Releases
+
+  - [releases](https://github.com/open-telemetry/opentelemetry-java-contrib/releases)