";System.out.println("原始字符串: "+input);System.out.println("前两位: "+getFirstTwoCharacters(input));System.out.println("后两位: "+getLastTwoCharacters(input));}publicstaticStringgetFirstTwoCharacters(Stringstr){if(str.length()<2){returnstr;// 如果长度小于2,返回整个字符串}returnstr.sub...
// 原始字符串StringoriginalString="Hello, World!";// 使用substring方法截取前两位StringfirstTwoCharacters=originalString.substring(0,2);System.out.println("截取的前两位:"+firstTwoCharacters); 1. 2. 3. 4. 5. 在上面的代码中,我们首先定义了一个原始字符串originalString,然后使用substring方法来截取前两...
packagecom.journaldev.util;publicclassStringSubstringExample{publicstaticvoidmain(String[]args){Stringstr="www.journaldev.com";System.out.println("Last 4 char String: "+str.substring(str.length()-4));System.out.println("First 4 char String: "+str.substring(0,4));System.out.println("website ...
publicfinalclassString{/**The value is used for character storage.*/privatefinalcharvalue[];/**The offset is the first index of the storage that is used.*/privatefinalintoffset;/**The count is the number of characters in the String.*/privatefinalintcount;/**Cache the hash code for the ...
类在这点中做得很好。在 String 类中许多会对字符串进行操作的方法中，例如replaceAll()或者substring(...
RegEx's meta characters ".$|()[{^?*+\\", or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter. */char ch =0;if(((regex.value.length==1&&".$|()[{^?*+\\".indexOf(ch = regex.charAt(0)) == -1) || ...
RegEx's meta characters ".$|()[{^?*+\\", or (2)two-char String and the first char is the backslash and the second is not the ascii digit or ascii letter. */char ch=0;if(((regex.value.length==1&&".$|()[{^?*+\\".indexOf(ch=regex.charAt(0))==-1)||(regex.length()...
String substring(int beginIndex) Returns a new string that is a substring of this string. The integer argument specifies the index of the first character. Here, the returned substring extends to the end of the original string. The following code gets from the Niagara palindrome the substring tha...
Write a Java program to check if the first and last characters of a string are the same, then return the string without them. Write a Java program to remove matching boundary characters from a string and output the resulting substring. ...
1. substring(int beginIndex) The first variant of the substring() method accepts only one parameter. i.e. beginIndex The substring will start from the specified beginIndex and it will extend to the end of the string. public String substring(int beginIndex) Returns a string that is a substring...