String mainString = "Hello, World!"; String subString = "World"; int position = mainString.indexOf(subString); if (position != -1) { System.out.println("子字符串在主字符串中的位置是:" + position); } else { System.out.println("子字符串未找到!"); } 1. 2. 3. 4. 5. 6. 7....
Input string: Hello, world, again! Position of last comma: 12 Position of last 'world': 7 The LastIndexOf() method is used to find the position of the last occurrence of a character and a substring in a string. This code section is similar to the previous one, but it uses the Last...
When we do not pass theendIndexargument, the substring is taken up to the last character of the string. In other words, if not specified, the value ofendIndexis always‘string.length() – 1’. In the following example, we are getting the substring from index position 6. Assertions.asser...
Learn to find the location of a character or substring in a given string and at what index position using the String.indexOf() with examples.
问Java中字符串数的加减运算EN将这两个数字作为字符串，将符号存储到符号字符串中，并将其存储到相应的numbers对象中，然后调用您的方法，如下所示 !
2. Get a substring between two delimiters In this program, we are usingindexOf()andsubstring() methodofJava String class. We are finding the indexes of delimiters in the string using indexOf() method. Once we have the indexes of delimiters, we are calling substring method to find the subs...
binaryFindTest(long[] data, long target) { long start = System.nanoTime(); int result = binaryFind(data, target); long end = System.nanoTime(); System.out.println(“binary search position:” + result); System.out.println(“binary search time:” + (end – start)); } } 2.编程...
2.1. Getting a Substring Starting at a Specific Character In case the position needs to be dynamically calculated based on a character orStringwe can make use of theindexOfmethod: assertEquals("United States of America", text.substring(text.indexOf('(') +1, text.indexOf(')'))); ...
函数介绍:在testString中取得header和tail之间的字符串。不存在则返回空 例程: String htmlContent = "ABC1234ABC4567"; System.out.println(StringUtils.substringBetween(htmlContent, "1234", "4567")); System.out.println(StringUtils.substringBetween(htmlContent, "12345", "4567")); ...
The idea is to use the indexOf() method of the String class, which returns the index within this string of the first occurrence of the specified substring, starting at the specified index. It returns -1 if there is no such occurrence. The trick is to start from the position where the ...