Java中的 CollationElementIterator reset() 方法及示例

Java.text.CollationElementIterator类的reset()方法用于将迭代器的光标重置到输入字符串的开头。

句法：

public void reset()

参数：此方法不接受任何参数。
返回值：此方法没有任何返回值。

以下是说明reset()方法的示例：

示例 1：

Java

// Java program to demonstrate
// reset() 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 cursor of iterator
        cel.setOffset(2);
        cel.next();
 
        // display the result
        System.out.println(
            "current offset before calling reset() "
            + cel.getOffset());
 
        // reset the cursor to the
        // beginning of the string
        // using reset() method
        cel.reset();
 
        // display the result
        System.out.println(
            "\ncurrent offset after calling reset() "
            + cel.getOffset());
    }
}

输出：

current offset before calling reset() 3

current offset after calling reset() 0

示例 2：

Java

// Java program to demonstrate
// reset() 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 cursor of iterator
        cel.setOffset(3);
        cel.previous();
 
        // display the result
        System.out.println(
            "current offset before calling reset() "
            + cel.getOffset());
 
        // reset the cursor to the beginning of the string
        // using reset() method
        cel.reset();
 
        // display the result
        System.out.println(
            "\ncurrent offset after calling reset() "
            + cel.getOffset());
    }
}

输出：

current offset before calling reset() 2

current offset after calling reset() 0

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