# dropCollection()

This operation drops a collection.

```java
public void dropCollection(DropCollectionReq request)
```

## Request Syntax

```java
dropCollection(DropCollectionReq.builder()
    .collectionName(String collectionName)
    .timeout(Long timeout)
    .build()
)
```

**BUILDER METHODS:**

- `collectionName(String collectionName)`

    The name of an existing collection.

- `timeout(Long timeout)`

    The timeout duration of the process. The process terminates after the specified duration expires.

    The value defaults to `60000L`, indicating the timeout duration is **1** minute.

**RETURNS:**

*void*

**EXCEPTIONS:**

- **MilvusClientExceptions**

    This exception will be raised when any error occurs during this operation.

## Example

```java
import io.milvus.v2.client.ConnectConfig;
import io.milvus.v2.client.MilvusClientV2;
import io.milvus.v2.service.collection.request.DropCollectionReq;

// 1. Set up a client
ConnectConfig connectConfig = ConnectConfig.builder()
        .uri("http://localhost:19530")
        .token("root:Milvus")
        .build();
        
MilvusClientV2 client = new MilvusClientV2(connectConfig);

// drop a collection: test
DropCollectionReq dropCollectionReq = DropCollectionReq.builder()
        .collectionName("test")
        .build();
client.dropCollection(dropCollectionReq);
```