; String lastCharacter = str.substring(str.length() - 1); System.out.println("最后一位字符是:" + lastCharacter); } } 这段代码首先获取字符串str的长度,然后通过substring方法从字符串的倒数第一个字符开始截取,直到字符串的末尾。 2. JavaScript 实现 在JavaScript中,有多种方法可以截取字符串的最后...
publicclassSubstringExample{publicstaticvoidmain(String[]args){Stringstr="Hello World!";StringlastCharacter=str.substring(str.length()-1);System.out.println("最后一位字符是:"+lastCharacter);}} 1. 2. 3. 4. 5. 6. 7. 运行上面的代码,输出结果为: 最后一位字符是:! 1. 流程图 下面是截取最后...
to A nonnegative optional integer that is one greater than the position of the last character of the desired substring. If this argument is omitted, the returned substring runs to the end of the string. 指定想要得到字符串的结束位置,不包括该位置的字符(非负整数,可选,没有指定则返回从指定开始...
Example 1: Using substring letstring ="Programiz JavaScript Tutorials"; // first charactersubstr1 = string.substring(0,1); console.log(substr1);// P // if start > end, they are swappedsubstr2 = string.substring(1,0); console.log(substr2);// P// From 11th to last charactersubstr3 ...
letstring="Programiz JavaScript Tutorials";// first charactersubstr1 =string.substring(0,1); console.log(substr1);// P// if start > end, they are swappedsubstr2 =string.substring(1,0); console.log(substr2);// P// From 11th to last charactersubstr3 =string.substring(10); ...
A nonnegative integer that specifies the position within string of the first character of the desired substring. 指定想要得到字符串的开始位置,即索引(非负整数) to A nonnegative optional integer that is one greater than the position of the last character of the desired substring. If this argument...
② public String substring(int beginIndex, int endIndex) 这个方法截取的字符串从beginIndex开始,到字符串索引的endIndex - 1结束,即截取的字符串不包括endIndex这个索引对应的字符,所以endIndex的最大值为整个字符串的长度,所以使用这个方法的时候需要特别注意容易发生字符串截取越界的问题 ...
NewSubstring is any string. StartingPosition and EndPosition are both integers between 0 and NewSubstring.length – 1. StartingPosition is the index of the first character in the substring, whereas EndPosition is the index of the last character in the substring plus 1. The following script assi...
var lengthOfLongestSubstring = function(s) { if (s.length < 2) return s.length; let max = 0, lastBegin = 0, code, characterIndex = new Array(255), fresh; for (let i = 0; i !== s.length; ++i) { code = s.charCodeAt(i); if (characterIndex[code] >= lastBegin) { last...
First character is at index 0. endOptional. End position (up to, but not including). If omitted: the rest of the string. Return Value TypeDescription A stringA string containing the extracted characters. More Examples If start is greater than end, parameters are swapped: ...