Java中的 CollationElementIterator next() 方法及示例

Java.text.CollationElementIterator 类的next()方法用于获取下一个 Collator 元素。此方法将迭代器推送到下一个元素并返回其值。

句法：

public int next()

参数：此方法接受任何参数。

返回值：此方法将下一个整理器元素的值作为整数值返回。

以下是说明next()方法的示例：

示例 1：

// Java program to demonstrate next() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        // creating and initializing testString
        String test = "abcd";
  
        // creating and initializing
        // RuleBasedCollator object
        RuleBasedCollator rbc
            = (RuleBasedCollator)(Collator.getInstance());
  
        // creating and initializing
        // CollationElementIterator
        CollationElementIterator cel
            = rbc.getCollationElementIterator(test);
  
        // setting offset to index 4
        cel.setOffset(1);
  
        // display the result
        System.out.println("current offset before"
                           + " calling next() "
                           + cel.getOffset());
  
        // getting offset of the next collator element
        // using next() method
        int value = cel.next();
  
        // display the result
        System.out.println("\ncurrent element value"
                           + " after calling next() "
                           + value);
    }
}

输出：

current offset before calling next() 1

current element value after calling next() 5439488

示例 2：

// Java program to demonstrate next() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        // creating and initializing testString
        String test = "abcd";
  
        // creating and initializing
        // RuleBasedCollator object
        RuleBasedCollator rbc
            = (RuleBasedCollator)(Collator.getInstance());
  
        // creating and initializing
        // CollationElementIterator
        CollationElementIterator cel
            = rbc.getCollationElementIterator(test);
  
        // setting offset to index 4
        cel.setOffset(2);
  
        // display the result
        System.out.println("current offset before"
                           + " calling next() "
                           + cel.getOffset());
  
        // getting offset of the next collator element
        // using next() method
        int value = cel.next();
  
        // display the result
        System.out.println("\ncurrent offset after"
                           + " calling next() "
                           + cel.getOffset());
    }
}

输出：

current offset before calling next() 2

current offset after calling next() 3

参考： https://docs.oracle.com/javase/9/docs/api/ Java/text/CollationElementIterator.html#next–