Java:获取匹配项在字符串中的位置的方法?
String match = "hello";String text = "0123456789hello0123456789";
int position = getPosition(match, text); // should be 10, is there such a method?
回答:
执行此操作的方法家族是:
int indexOf(String str)
indexOf(String str, int fromIndex)
int lastIndexOf(String str)
lastIndexOf(String str, int fromIndex)
返回指定子字符串的第一个(或最后一个)出现在此字符串内的索引[ 从指定索引处开始向前(或向后搜索)]。
String text = "0123hello9012hello8901hello7890";String word = "hello";
System.out.println(text.indexOf(word)); // prints "4"
System.out.println(text.lastIndexOf(word)); // prints "22"
// find all occurrences forward
for (int i = -1; (i = text.indexOf(word, i + 1)) != -1; i++) {
System.out.println(i);
} // prints "4", "13", "22"
// find all occurrences backward
for (int i = text.length(); (i = text.lastIndexOf(word, i - 1)) != -1; i++) {
System.out.println(i);
} // prints "22", "13", "4"
以上是 Java:获取匹配项在字符串中的位置的方法? 的全部内容, 来源链接: utcz.com/qa/428217.html