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Building LLM-Powered Applications with Claude

Build LLM-powered apps with the Anthropic Claude API or SDK across Python, TypeScript, Java, Go, Ruby, C#, and PHP.

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java/claude-api/files-api.md

1# Files API — Java
2 
3## Files API (Beta)
4 
5Under `client.beta().files()`. File references in messages need the beta message types (non-beta `DocumentBlockParam.Source` has no file-ID variant).
6 
7```java
8import com.anthropic.models.beta.files.FileUploadParams;
9import com.anthropic.models.beta.files.FileMetadata;
10import com.anthropic.models.beta.messages.BetaRequestDocumentBlock;
11import com.anthropic.models.beta.messages.BetaFileDocumentSource;
12import java.nio.file.Paths;
13 
14FileMetadata meta = client.beta().files().upload(
15    FileUploadParams.builder()
16        .file(Paths.get("/path/to/doc.pdf"))  // or .file(InputStream) or .file(byte[])
17        .build());
18 
19// Reference in a beta message:
20BetaRequestDocumentBlock doc = BetaRequestDocumentBlock.builder()
21    .source(BetaFileDocumentSource.builder().fileId(meta.id()).build())
22    .build();
23```
24 
25Other methods: `.list()`, `.delete(String fileId)`, `.download(String fileId)`, `.retrieveMetadata(String fileId)`.
26

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Building LLM-Powered Applications with Claude

java/claude-api/files-api.md