Java中的 CharacterIterator setIndex() 方法及示例
Java中Java .text.CharacterIterator接口的setIndex()方法用来设置这个CharacterIterator要读取的当前索引。此方法将要设置的索引作为参数,并在该索引处设置此 CharacterIterator 的索引,然后返回该字符。
句法:
public char setIndex(int index)
参数:该方法以要设置的索引为参数,设置此 CharacterIterator 的索引。
返回值:该方法返回该方法设置的索引处的字符。
异常:如果指定的索引不在有效范围内(getBeginIndex()、getEndIndex() – 1),则此方法抛出 IllegalArgumentException。
程序:
// Java program to demonstrate
// the above method
import java.text.*;
import java.util.*;
public class CharacterIteratorDemo {
public static void main(String[] args)
{
CharacterIterator characterIterator
= new StringCharacterIterator(
"GeeksForGeeks");
System.out.println("Current Index: "
+ characterIterator
.getIndex());
int index = 5;
System.out.println("Updated the index to : "
+ index);
System.out.println("Character at new"
+ " current index: "
+ characterIterator
.setIndex(index));
}
}
输出:
Current Index: 0
Updated the index to : 5
Character at new current index: F
参考: https://docs.oracle.com/javase/9/docs/api/ Java/text/CharacterIterator.html#setIndex-int-