Java中的 RuleBasedCollator getCollationElementIterator(CharacterIterator) 方法

Java.text.RuleBasedCollator 类的getCollationElementIterator ()方法用于获取给定字符迭代器对象的排序规则元素迭代器对象。

句法：

public CollationElementIterator getCollationElementIterator(CharacterIterator source)

参数：此方法接受字符迭代器对象作为参数。

返回值：此方法返回给定字符串的排序规则元素迭代器的对象。

下面是说明getCollationElementIterator()方法的示例：

示例 1：

// Java program to demonstrate
// getCollationElementIterator() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b < c < d";
  
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
  
            // Creating and initializing
            // StringCharacterIterator Object
            StringCharacterIterator obj
                = new StringCharacterIterator("Geeks");
  
            // getting CollationElementIterator Object
            // for the given String
            // using getCollationElementIterator() method
            CollationElementIterator key
                = col.getCollationElementIterator(obj);
  
            // display result
            System.out.println(
                "CollationElementIterator is : "
                + key);
        }
  
        catch (ClassCastException e) {
  
            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

CollationElementIterator is : java.text.CollationElementIterator@7d4991ad

示例 2：

// Java program to demonstrate
// getCollationElementIterator() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new simple rule
            String simple
                = "< a < b & a < c";
  
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
  
            // Creating and initializing
            // StringCharacterIterator Object
            StringCharacterIterator obj
                = new StringCharacterIterator("ABCDEF");
  
            // getting CollationElementIterator Object
            // for the given StringCharacterIterator Object
            // using getCollationElementIterator() method
            CollationElementIterator key
                = col.getCollationElementIterator(obj);
  
            // display result
            System.out.println(
                "CollationElementIterator is : "
                + key);
        }
  
        catch (ClassCastException e) {
  
            System.out.println("Exception thrown : " + e);
        }
        catch (ParseException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出：

CollationElementIterator is : java.text.CollationElementIterator@7d4991ad

参考： https://docs.oracle.com/javase/9/docs/api/ Java/text/RuleBasedCollator.html#getCollationElementIterator-java.text.CharacterIterator-