[Chapter 29] 29.4 java.text.CollationElementIterator (JDK 1.1)

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| Chapter 29 The java.text Package |

## 29.4 java.text.CollationElementIterator (JDK 1.1)

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A `CollationElementIterator` object is returned by the `getCollationElementIterator()` method of the `RuleBasedCollator` object. The purpose of this class is to allow a program to iterate (with the `next()` method) through the characters of a string, returning ordering values for each of the "collation keys" in the string. Note that collation keys are not exactly the same thing as characters. In the traditional Spanish collation order, for example, the two-character sequence "ch" is treated as a single collation key that comes alphabetically between the letters "c" and "d."

The value returned by the `next()` method is the collation order of the next collation key in the string. This numeric value can be directly compared to the value returned by `next()` for other `CollationElementIterator` objects. The value returned by `next()` can also be decomposed into primary, secondary, and tertiary ordering values with the static methods of this class.

This class is used by `RuleBasedCollator` to implement its `compare()` method, and to create `CollationKey` objects. Few applications ever need to use it directly.

    public final class CollationElementIterator extends Object {
        // No Constructor
        // Constants
                public static final int NULLORDER;
        // Class Methods
                public static final int primaryOrder(int order);
                public static final short secondaryOrder(int order);
                public static final short tertiaryOrder(int order);
        // Public Instance Methods
                public int next();
                public void reset();
    }

### Returned By:

RuleBasedCollator.getCollationElementIterator()

java.text.ChoiceFormat (JDK 1.1) |  | java.text.CollationKey (JDK 1.1)