javalastindexof_JavaStringBufferlastIndexOf()方法

Java StringBuffer lastIndexOf()方法

java.lang.StringBuffer.lastIndexOf(String str, int fromIndex)方法返回指定子字符串最后一次出现的字符串中的索引fromIndex参数是从中开始搜索的索引。

1 语法

public int lastIndexOf(String str, int fromIndex)

2 参数

str &＃xff1a; 这是要搜索的子字符串。

fromIndex &＃xff1a; 这是开始搜索的索引。

3 返回值

此方法返回指定子字符串最后一次出现的此序列中的索引。

4 示例

package com.yiidian;

/**

* 一点教程网&＃xff1a; http://www.yiidian.com

*/

/**

* Java Enum compareTo()方法

*/

import java.lang.*;

public class StringBufferDemo {

public static void main(String[] args) {

StringBuffer buff &＃61; new StringBuffer("tutorials point");

System.out.println("buffer &＃61; " &＃43; buff);

/* returns the index within this string of the rightmost occurrence of the

specified substring */

System.out.println("last index of i &＃61; " &＃43; buff.lastIndexOf("i"));

// returns index as the substring is found with fromIndex 10

System.out.print("last index of als &＃61; ");

System.out.println(buff.lastIndexOf("als",10));

// returns -1 as fromIndex 2 can&＃39;t find the substring

System.out.print("last index of ori &＃61; ");

System.out.println(buff.lastIndexOf("ori",2));

}

}

输出结果为&＃xff1a;

buffer &＃61; tutorials point

last index of i &＃61; 12

last index of als &＃61; 6

last index of ori &＃61; -1