**Inheritance:**
java.lang.Object

**All Implemented Interfaces:**
java.lang.Iterable
```
public abstract class DocumentPropertyCollection implements Iterable
```

Base class for [BuiltInDocumentProperties](../../com.aspose.words/builtindocumentproperties/) and [CustomDocumentProperties](../../com.aspose.words/customdocumentproperties/) collections.

To learn more, visit the [ Work with Document Properties ][Work with Document Properties] documentation article.

 **Remarks:** 

The names of the properties are case-insensitive.

The properties in the collection are sorted alphabetically by name.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```


[Work with Document Properties]: https://docs.aspose.com/words/java/work-with-document-properties/
## Constructors

| Constructor | Description |
| --- | --- |
| [DocumentPropertyCollection()](#DocumentPropertyCollection) |  |
## Methods

| Method | Description |
| --- | --- |
| [clear()](#clear) | Removes all properties from the collection. |
| [contains(String name)](#contains-java.lang.String) | Returns  true  if a property with the specified name exists in the collection. |
| [get(int index)](#get-int) | Returns a [DocumentProperty](../../com.aspose.words/documentproperty/) object by index. |
| [get(String name)](#get-java.lang.String) | Provides access to the collection items. |
| [getCount()](#getCount) | Gets number of items in the collection. |
| [indexOf(String name)](#indexOf-java.lang.String) | Gets the index of a property by name. |
| [iterator()](#iterator) | Returns an iterator object that can be used to iterate over all items in the collection. |
| [remove(String name)](#remove-java.lang.String) | Removes a property with the specified name from the collection. |
| [removeAt(int index)](#removeAt-int) | Removes a property at the specified index. |
### DocumentPropertyCollection() {#DocumentPropertyCollection}
```
public DocumentPropertyCollection()
```


### clear() {#clear}
```
public void clear()
```


Removes all properties from the collection.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

### contains(String name) {#contains-java.lang.String}
```
public boolean contains(String name)
```


Returns  true  if a property with the specified name exists in the collection.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The case-insensitive name of the property. |

**Returns:**
boolean -  true  if the property exists in the collection;  false  otherwise.
### get(int index) {#get-int}
```
public DocumentProperty get(int index)
```


Returns a [DocumentProperty](../../com.aspose.words/documentproperty/) object by index.

 **Remarks:** 

**Note:**  In Java this method is slow because iterates over all nodes.

 **Examples:** 

Shows how to work with custom document properties.

```

 Document doc = new Document(getMyDir() + "Properties.docx");

 // Every document contains a collection of custom properties, which, like the built-in properties, are key-value pairs.
 // The document has a fixed list of built-in properties. The user creates all of the custom properties.
 Assert.assertEquals("Value of custom document property", doc.getCustomDocumentProperties().get("CustomProperty").toString());

 doc.getCustomDocumentProperties().add("CustomProperty2", "Value of custom document property #2");

 System.out.println("Custom Properties:");
 for (DocumentProperty customDocumentProperty : doc.getCustomDocumentProperties()) {
     System.out.println(customDocumentProperty.getName());
     System.out.println(MessageFormat.format("\tType:\t{0}", customDocumentProperty.getType()));
     System.out.println(MessageFormat.format("\tValue:\t\"{0}\"", customDocumentProperty.getValue()));
 }
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | int | Zero-based index of the [DocumentProperty](../../com.aspose.words/documentproperty/) to retrieve. |

**Returns:**
[DocumentProperty](../../com.aspose.words/documentproperty/) - A [DocumentProperty](../../com.aspose.words/documentproperty/) object by index.
### get(String name) {#get-java.lang.String}
```
public DocumentProperty get(String name)
```


Provides access to the collection items.  Returns a [DocumentProperty](../../com.aspose.words/documentproperty/) object by the name of the property.

 **Remarks:** 

Returns  null  if a property with the specified name is not found.

 **Examples:** 

Shows how to create a custom document property which contains a date and time.

```

 Document doc = new Document();

 doc.getCustomDocumentProperties().add("AuthorizationDate", new Date());

 System.out.println(MessageFormat.format("Document authorized on {0}", doc.getCustomDocumentProperties().get("AuthorizationDate")));
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The case-insensitive name of the property to retrieve. |

**Returns:**
[DocumentProperty](../../com.aspose.words/documentproperty/) - The corresponding [DocumentProperty](../../com.aspose.words/documentproperty/) value.
### getCount() {#getCount}
```
public int getCount()
```


Gets number of items in the collection.

 **Examples:** 

Shows how to work with custom document properties.

```

 Document doc = new Document(getMyDir() + "Properties.docx");

 // Every document contains a collection of custom properties, which, like the built-in properties, are key-value pairs.
 // The document has a fixed list of built-in properties. The user creates all of the custom properties.
 Assert.assertEquals("Value of custom document property", doc.getCustomDocumentProperties().get("CustomProperty").toString());

 doc.getCustomDocumentProperties().add("CustomProperty2", "Value of custom document property #2");

 System.out.println("Custom Properties:");
 for (DocumentProperty customDocumentProperty : doc.getCustomDocumentProperties()) {
     System.out.println(customDocumentProperty.getName());
     System.out.println(MessageFormat.format("\tType:\t{0}", customDocumentProperty.getType()));
     System.out.println(MessageFormat.format("\tValue:\t\"{0}\"", customDocumentProperty.getValue()));
 }
 
```

**Returns:**
int - Number of items in the collection.
### indexOf(String name) {#indexOf-java.lang.String}
```
public int indexOf(String name)
```


Gets the index of a property by name.

 **Remarks:** 

**Note:**  In Java this method is slow because iterates over all nodes.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The case-insensitive name of the property. |

**Returns:**
int - The zero based index. Negative value if not found.
### iterator() {#iterator}
```
public Iterator iterator()
```


Returns an iterator object that can be used to iterate over all items in the collection.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

**Returns:**
java.util.Iterator
### remove(String name) {#remove-java.lang.String}
```
public void remove(String name)
```


Removes a property with the specified name from the collection.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| name | java.lang.String | The case-insensitive name of the property. |

### removeAt(int index) {#removeAt-int}
```
public void removeAt(int index)
```


Removes a property at the specified index.

 **Remarks:** 

**Note:**  In Java this method is slow because iterates over all nodes.

 **Examples:** 

Shows how to work with a document's custom properties.

```

 Document doc = new Document();
 CustomDocumentProperties properties = doc.getCustomDocumentProperties();

 Assert.assertEquals(0, properties.getCount());

 // Custom document properties are key-value pairs that we can add to the document.
 properties.add("Authorized", true);
 properties.add("Authorized By", "John Doe");
 properties.add("Authorized Date", new Date());
 properties.add("Authorized Revision", doc.getBuiltInDocumentProperties().getRevisionNumber());
 properties.add("Authorized Amount", 123.45);

 // The collection sorts the custom properties in alphabetic order.
 Assert.assertEquals(1, properties.indexOf("Authorized Amount"));
 Assert.assertEquals(5, properties.getCount());

 // Print every custom property in the document.
 Iterator enumerator = properties.iterator();
 while (enumerator.hasNext()) {
     DocumentProperty property = enumerator.next();
     System.out.println(MessageFormat.format("Name: \"{0}\"\n\tType: \"{1}\"\n\tValue: \"{2}\"", property.getName(), property.getType(), property.getValue()));
 }

 // Display the value of a custom property using a DOCPROPERTY field.
 DocumentBuilder builder = new DocumentBuilder(doc);
 FieldDocProperty field = (FieldDocProperty) builder.insertField(" DOCPROPERTY \"Authorized By\"");
 field.update();

 Assert.assertEquals("John Doe", field.getResult());

 // We can find these custom properties in Microsoft Word via "File" -> "Properties" > "Advanced Properties" > "Custom".
 doc.save(getArtifactsDir() + "DocumentProperties.DocumentPropertyCollection.docx");

 // Below are three ways or removing custom properties from a document.
 // 1 -  Remove by index:
 properties.removeAt(1);

 Assert.assertFalse(properties.contains("Authorized Amount"));
 Assert.assertEquals(4, properties.getCount());

 // 2 -  Remove by name:
 properties.remove("Authorized Revision");

 Assert.assertFalse(properties.contains("Authorized Revision"));
 Assert.assertEquals(3, properties.getCount());

 // 3 -  Empty the entire collection at once:
 properties.clear();

 Assert.assertEquals(0, properties.getCount());
 
```

**Parameters:**
| Parameter | Type | Description |
| --- | --- | --- |
| index | int | The zero based index. |