Java BreakIterator next()方法及实例

java.text.BreakIterator 类的 next() 方法用于获取当前边界（通过调用current()方法获取的边界）前面的下一个边界的索引。它提供了BreakIterator指向的当前边界之后的第一个字符的偏移量。

语法

public abstract int next()

参数： 本方法不接受任何参数。

返回值： 该方法提供了当前边界之后下一个边界的 索引 。

下面是说明 next() 方法的例子。

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 with zero
        int current = 0, next = 0;
  
        // creating and initializing BreakIterator
        BreakIterator wb
            = BreakIterator.getWordInstance();
  
        // setting text for BreakIterator
        wb.setText("Code  Geeks");
  
        // getting the current text boundary
        current = wb.current();
  
        // display the result
        System.out.println(
            "current position before"
            + " calling next() : "
            + current);
  
        // calling next method
        next = wb.next();
  
        // display the result
        System.out.println(
            "\ncurrent position after"
            + " calling 1st next() : "
            + next);
  
        // calling next method
        next = wb.next();
  
        // display the result
        System.out.println(
            "\ncurrent position after"
            + " calling 2nd next() : "
            + next);
    }
}

输出:

current position before calling next() : 0

current position after calling 1st next() : 4

current position after calling 2nd next() : 6

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 with zero
        int current = 0, next = 0;
  
        // creating and initializing BreakIterator
        BreakIterator wb
            = BreakIterator.getWordInstance();
  
        // setting text for BreakIterator
        wb.setText("GeeksForGeeks");
  
        // getting the current text boundary
        current = wb.current();
  
        // display the result
        System.out.println(
            "current position before"
            + " calling next() : "
            + current);
  
        // calling next method
        next = wb.next();
  
        // display the result
        System.out.println(
            "\ncurrent position after"
            + " calling 1st next() : "
            + next);
  
        // calling next method
        next = wb.next();
  
        // display the result
        System.out.println(
            "\ncurrent position after"
            + " calling 2nd next() : "
            + next);
    }
}

输出:

current position before calling next() : 0

current position after calling 1st next() : 13

current position after calling 2nd next() : -1

参考资料: https://docs.oracle.com/javase/9/docs/api/java/text/BreakIterator.html#next-