String substring = img.substring(img.lastIndexOf("/") + 1); 1. 2. 3. public class StringUtils extends org.apache.commons.lang3.StringUtils { /** 空字符串 */ private static final String NULLSTR = ""; /** 下划线 */ private static final char SEPARATOR = '_'; /** * 获取参数不为...
publicclassLastSubstringExample{publicstaticStringgetLastSubstring(Stringstr,charcharacter){String[]parts=str.split(String.valueOf(character));if(parts.length>1){returnparts[parts.length-1];}else{return"";}}publicstaticvoidmain(String[]args){StringexampleString="Hello, World!";charexampleCharacter=',...
String stri1 = String.valueOf(integer); //将整形转换为字符串类型 String strl1 = String.valueOf(LongInt); //将长整型转换为字符串类型 String strf1 = String.valueOf(f); //将单精度浮点型转换为字符串类型 String strd1 = String.valueOf(d); //将double类型转换为字符串类型 String strbt1 =...
Java Code: // Define a public class named Exercise21.publicclassExercise21{// Define the main method.publicstaticvoidmain(String[]args){// Declare and initialize a string variable.Stringstr="The quick brown fox jumps over the lazy dog.";// Get the index of all the characters of the alph...
(1)String常用方法 1.charAt():返回指定索引处的字符串2.compareTo():比较字符串,返回第一个不相等字符的ASCII差值,如果字符都相等,则返回字符串长度差值3.copyValueOf(char[],offset,count):参数是一个数组,返回的是一个String对象,将数组中的元素考到一个String对象中;getChars()方法正好与之相反,将特定位置...
Note:You will get an error if startIndex/endIndexis negative or greater than string's length startIndexis greater thanendIndex Example 1: Java substring() With Only Start Index classMain{publicstaticvoidmain(String[] args){ String str1 ="program";// 1st character to the last character ...
StringUtilscomes with two handy methods that we can use to delete the character at the end of a string. So, let’s dig deep and explore each one. UsingStringUtils.chop()Method StringUtilsprovides thechop()method,especially to remove the last character from a string. ...
string基础 JavaString 类 创建字符串 StringDemo.java 文件代码: String基本用法 创建String对象的常用方法 String中常用的方法,用法如图所示,具体问度娘 三个方法的使用: lenth() substring() charAt() 字符串与byte数组间的相互转换 ==运算符和equals之间的区别: ...
看主流的 JDK 版本 1.8 ,String 内部实际存储结构为 char 数组,源码如下: public final class String implements java.io.Serializable, Comparable<String>, CharSequence { /** The value is used for character storage. */ private final char value[]; ...
lastIndexOf方法类似,只不过他是从后往前查找,此处不再赘述。 下面看一个截取子串的方法: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 publicStringsubstring(int beginIndex){if(beginIndex<0){thrownewStringIndexOutOfBoundsException(beginIndex);}int subLen=value.length-beginIndex;if(subLen<0){throwne...