java.lang.Object
- org.apache.hc.client5.http.cache.HeaderConstants

```
public class HeaderConstants
extends java.lang.Object
```
Records static constants for caching directives.

Since:

4.1

Field Summary

Fields
Modifier and Type	Field	Description
`static java.lang.String`	`AGE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`ALLOW`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`AUTHORIZATION`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`CACHE_CONTROL`
`static java.lang.String`	`CACHE_CONTROL_IMMUTABLE`
`static java.lang.String`	`CACHE_CONTROL_MAX_AGE`
`static java.lang.String`	`CACHE_CONTROL_MAX_STALE`
`static java.lang.String`	`CACHE_CONTROL_MIN_FRESH`
`static java.lang.String`	`CACHE_CONTROL_MUST_REVALIDATE`
`static java.lang.String`	`CACHE_CONTROL_MUST_UNDERSTAND`
`static java.lang.String`	`CACHE_CONTROL_NO_CACHE`
`static java.lang.String`	`CACHE_CONTROL_NO_STORE`
`static java.lang.String`	`CACHE_CONTROL_ONLY_IF_CACHED`
`static java.lang.String`	`CACHE_CONTROL_PRIVATE`
`static java.lang.String`	`CACHE_CONTROL_PROXY_REVALIDATE`
`static java.lang.String`	`CACHE_CONTROL_PUBLIC`
`static java.lang.String`	`CACHE_CONTROL_S_MAX_AGE`
`static java.lang.String`	`CACHE_CONTROL_STALE_IF_ERROR`
`static java.lang.String`	`CACHE_CONTROL_STALE_WHILE_REVALIDATE`
`static java.lang.String`	`CONTENT_RANGE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`DELETE_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`ETAG`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`EXPIRES`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`GET_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`HEAD_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`IF_MATCH`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`IF_MODIFIED_SINCE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`IF_NONE_MATCH`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`IF_RANGE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`IF_UNMODIFIED_SINCE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`LAST_MODIFIED`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`MAX_FORWARDS`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`OPTIONS_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`POST_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`PRAGMA`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`PRIVATE`	Deprecated. Use `CACHE_CONTROL_PRIVATE`
`static java.lang.String`	`PROXY_AUTHENTICATE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`PUBLIC`	Deprecated. Use `CACHE_CONTROL_PUBLIC`
`static java.lang.String`	`PUT_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`RANGE`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`STALE_IF_ERROR`	Deprecated. Use `CACHE_CONTROL_STALE_IF_ERROR`
`static java.lang.String`	`STALE_WHILE_REVALIDATE`	Deprecated. Use `CACHE_CONTROL_STALE_WHILE_REVALIDATE`
`static java.lang.String`	`TRACE_METHOD`	Deprecated. Use `Method`
`static java.lang.String`	`VARY`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`VIA`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`WARNING`	Deprecated. Use `HttpHeaders`
`static java.lang.String`	`WWW_AUTHENTICATE`	Deprecated. Use `HttpHeaders`

Constructor Summary

Constructors
Constructor Description

HeaderConstants()

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - GET_METHOD
```
@Deprecated
public static final java.lang.String GET_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - HEAD_METHOD
```
@Deprecated
public static final java.lang.String HEAD_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - OPTIONS_METHOD
```
@Deprecated
public static final java.lang.String OPTIONS_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - PUT_METHOD
```
@Deprecated
public static final java.lang.String PUT_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - DELETE_METHOD
```
@Deprecated
public static final java.lang.String DELETE_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - TRACE_METHOD
```
@Deprecated
public static final java.lang.String TRACE_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - POST_METHOD
```
@Deprecated
public static final java.lang.String POST_METHOD
```
    Deprecated.
    Use Method
    
    See Also:
    
    Constant Field Values
  - LAST_MODIFIED
```
@Deprecated
public static final java.lang.String LAST_MODIFIED
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - IF_MATCH
```
@Deprecated
public static final java.lang.String IF_MATCH
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - IF_RANGE
```
@Deprecated
public static final java.lang.String IF_RANGE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - IF_UNMODIFIED_SINCE
```
@Deprecated
public static final java.lang.String IF_UNMODIFIED_SINCE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - IF_MODIFIED_SINCE
```
@Deprecated
public static final java.lang.String IF_MODIFIED_SINCE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - IF_NONE_MATCH
```
@Deprecated
public static final java.lang.String IF_NONE_MATCH
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - PRAGMA
```
@Deprecated
public static final java.lang.String PRAGMA
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - MAX_FORWARDS
```
@Deprecated
public static final java.lang.String MAX_FORWARDS
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - ETAG
```
@Deprecated
public static final java.lang.String ETAG
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - EXPIRES
```
@Deprecated
public static final java.lang.String EXPIRES
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - AGE
```
@Deprecated
public static final java.lang.String AGE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - VARY
```
@Deprecated
public static final java.lang.String VARY
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - ALLOW
```
@Deprecated
public static final java.lang.String ALLOW
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - VIA
```
@Deprecated
public static final java.lang.String VIA
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - PUBLIC
```
@Deprecated
public static final java.lang.String PUBLIC
```
    Deprecated.
    Use CACHE_CONTROL_PUBLIC
    
    See Also:
    
    Constant Field Values
  - PRIVATE
```
@Deprecated
public static final java.lang.String PRIVATE
```
    Deprecated.
    Use CACHE_CONTROL_PRIVATE
    
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL
```
public static final java.lang.String CACHE_CONTROL
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_PUBLIC
```
public static final java.lang.String CACHE_CONTROL_PUBLIC
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_PRIVATE
```
public static final java.lang.String CACHE_CONTROL_PRIVATE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_NO_STORE
```
public static final java.lang.String CACHE_CONTROL_NO_STORE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_NO_CACHE
```
public static final java.lang.String CACHE_CONTROL_NO_CACHE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_MAX_AGE
```
public static final java.lang.String CACHE_CONTROL_MAX_AGE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_S_MAX_AGE
```
public static final java.lang.String CACHE_CONTROL_S_MAX_AGE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_MAX_STALE
```
public static final java.lang.String CACHE_CONTROL_MAX_STALE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_MIN_FRESH
```
public static final java.lang.String CACHE_CONTROL_MIN_FRESH
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_MUST_REVALIDATE
```
public static final java.lang.String CACHE_CONTROL_MUST_REVALIDATE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_PROXY_REVALIDATE
```
public static final java.lang.String CACHE_CONTROL_PROXY_REVALIDATE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_STALE_IF_ERROR
```
public static final java.lang.String CACHE_CONTROL_STALE_IF_ERROR
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_STALE_WHILE_REVALIDATE
```
public static final java.lang.String CACHE_CONTROL_STALE_WHILE_REVALIDATE
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_ONLY_IF_CACHED
```
public static final java.lang.String CACHE_CONTROL_ONLY_IF_CACHED
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_MUST_UNDERSTAND
```
public static final java.lang.String CACHE_CONTROL_MUST_UNDERSTAND
```
    See Also:
    
    Constant Field Values
  - CACHE_CONTROL_IMMUTABLE
```
public static final java.lang.String CACHE_CONTROL_IMMUTABLE
```
    See Also:
    
    Constant Field Values
  - STALE_IF_ERROR
```
@Deprecated
public static final java.lang.String STALE_IF_ERROR
```
    Deprecated.
    Use CACHE_CONTROL_STALE_IF_ERROR
    
    See Also:
    
    Constant Field Values
  - STALE_WHILE_REVALIDATE
```
@Deprecated
public static final java.lang.String STALE_WHILE_REVALIDATE
```
    Deprecated.
    Use CACHE_CONTROL_STALE_WHILE_REVALIDATE
    
    See Also:
    
    Constant Field Values
  - WARNING
```
@Deprecated
public static final java.lang.String WARNING
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - RANGE
```
@Deprecated
public static final java.lang.String RANGE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - CONTENT_RANGE
```
@Deprecated
public static final java.lang.String CONTENT_RANGE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - WWW_AUTHENTICATE
```
@Deprecated
public static final java.lang.String WWW_AUTHENTICATE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - PROXY_AUTHENTICATE
```
@Deprecated
public static final java.lang.String PROXY_AUTHENTICATE
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
  - AUTHORIZATION
```
@Deprecated
public static final java.lang.String AUTHORIZATION
```
    Deprecated.
    Use HttpHeaders
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - HeaderConstants
```
public HeaderConstants()
```

Class HeaderConstants

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

GET_METHOD

HEAD_METHOD

OPTIONS_METHOD

PUT_METHOD

DELETE_METHOD

TRACE_METHOD

POST_METHOD

LAST_MODIFIED

IF_MATCH

IF_RANGE

IF_UNMODIFIED_SINCE

IF_MODIFIED_SINCE

IF_NONE_MATCH

PRAGMA

MAX_FORWARDS

ETAG

EXPIRES

AGE

VARY

ALLOW

VIA

PUBLIC

PRIVATE

CACHE_CONTROL

CACHE_CONTROL_PUBLIC

CACHE_CONTROL_PRIVATE

CACHE_CONTROL_NO_STORE

CACHE_CONTROL_NO_CACHE

CACHE_CONTROL_MAX_AGE

CACHE_CONTROL_S_MAX_AGE

CACHE_CONTROL_MAX_STALE

CACHE_CONTROL_MIN_FRESH

CACHE_CONTROL_MUST_REVALIDATE

CACHE_CONTROL_PROXY_REVALIDATE

CACHE_CONTROL_STALE_IF_ERROR

CACHE_CONTROL_STALE_WHILE_REVALIDATE

CACHE_CONTROL_ONLY_IF_CACHED

CACHE_CONTROL_MUST_UNDERSTAND

CACHE_CONTROL_IMMUTABLE

STALE_IF_ERROR

STALE_WHILE_REVALIDATE

WARNING

RANGE

CONTENT_RANGE

WWW_AUTHENTICATE

PROXY_AUTHENTICATE

AUTHORIZATION

Constructor Detail

HeaderConstants