text/java this.codePointAt(k) == ch </blockquote> is true. In either case, if no such character occurs in this string, then-1is returned. Java documentation forjava.lang.String.indexOf(int). Portions of this page are modifications based on work created and shared by theAndroid Open ...
Returns the index within this string of the last occurrence of the specified character. For values of ch in the range from 0 to 0xFFFF (inclusive), the index (in Unicode code units) returned is the largest value k such that: <blockquote> text/java 复制 this.charAt(k) == ch </bl...
Java CopyindexOf(String str, int fromIndex)StringBuilder类的 indexOf(String str, int fromIndex) 方法是一个内置的方法,用于返回从指定的索引’fromIndex’开始的、作为参数的子串在字符串中第一次出现的索引。如果子串str不存在,则返回-1。 fromIndex 是整数类型的值,指的是开始搜索的索引。这个方法返回的索引...
Search a string for the first occurrence of "planet": StringmyStr="Hello planet earth, you are a great planet.";System.out.println(myStr.indexOf("planet")); Try it Yourself » Definition and Usage TheindexOf()method returns the position of the first occurrence of specified character(s)...
The lastIndexOf() Method The search() Method The match() Method Syntax string.indexOf(searchvalue,start) Parameters ParameterDescription searchvalueRequired. The string to search for. startOptional. The position to start from (default is 0). ...
Java String lastIndexOf Method: The lastIndexOf() method returns the index within this string of the last occurrence of the specified character.
More Java Courses IndexOf(String substring) This method returns the index of the first character of the substring passed as parameter to it. If the specified substring is not present in the string, the returned index would be -1. IndexOf(String substring, int fromindex) ...
Java CopylastIndexOf(String str, int fromIndex)StringBuffer类的 lastIndexOf(String str, int fromIndex) 方法是一个内置的方法,用于返回字符串中第一次出现的子串参数的索引,从指定的索引’fromIndex’开始向后搜索。如果子串str不存在,则返回-1。 fromIndex 是整数类型的值,指的是开始搜索的索引,但是这个搜索...
**Java String indexOf用法** **一、基本用法** In Java, the `indexOf` method in the `String` class is super useful. It helps you find the position of a particular character or a substring within a string. For example, if you have a string like "Hello, world!" and you want to fin...
text/java this.codePointAt(k) == ch </blockquote> is true. In either case, if no such character occurs in this string, then-1is returned. TheStringis searched backwards starting at the last character. Java documentation forjava.lang.String.lastIndexOf(int). Portions of...