java查找字符串将找到的字符串索引位置存储到集合中

package com.hmkcode;import java.util.ArrayList;import java.util.List;public class SearchStr {/** * 查询字符串searchValue在字符串str中的位置索引(最多查询3位长度字符) * @param str 一组字符串 * @param searchValue 要查找的字符串 * @return List<Integer> 存储查找的字符串索引 */public static List<Integer> searchStrIndex(String str,String searchValue){//定义存储查找的字符串索引集合List<Integer> searchIndexList = new ArrayList<Integer>();for(int i=0;i<str.length();i++){if(searchValue.length()==1){String ch1 = String.valueOf(str.charAt(i));if(ch1.equals(searchValue)){searchIndexList.add(i);}}else if(searchValue.length()==2){String ch1 = String.valueOf(str.charAt(i));String ch2;if(i<str.length()-1){ch2 = String.valueOf(str.charAt(i+1));String value = ch1+ch2;if(value.equals(searchValue)){searchIndexList.add(i);}}}else if(searchValue.length()==3){String ch1 = String.valueOf(str.charAt(i));String ch2;String ch3;if(i<str.length()-1){ch2 = String.valueOf(str.charAt(i+1));if(i<str.length()-2){ch3 = String.valueOf(str.charAt(i+2));String value = ch1+ch2+ch3;System.out.println(value);if(value.equals(searchValue)){searchIndexList.add(i);}}}}}return searchIndexList;}public static void main(String[] args) {List<Integer> searchIndexList = searchStrIndex("chabdeab89da+=()hkabd","abd");for(Integer index : searchIndexList){System.out.println("index:"+index.intValue());}}}