The length of the new substring() will be endIndex - beginIndex. Since String is immutable i.e once created can not be changed or modified, substring() method will return a new String without first and In simple words, substring() will include beginIndex and extends till the end excluding the endIndex. The above method will create the substring starting from the beginIndex and extends to the character at index endIndex-1. String class provides two overloaded substring methods but we will use the below method to remove first and the last character from the given String. Substring() method is present in the String class. Using substring(int beginIndex, int endIndex) method Read Also: Difference between String, StringBuilder, and StringBufferġ. The StringUtils.substring() method takes one extra parameter than the built-in substring() the string you want to remove a character from.In this article, I will be sharing different ways to remove the first and last character from String in java. For example: Beginnersbook.substring (9) would return book as a substring. This is a built-in method of string class, it returns the substring based on the index values passed to this method. length ( ) - 1 ) // print the new string System. The substring () method is used to get a substring from a given string. This method is null-safe, which means it won't throw an exception if the string is null: String str = "Hello World!" // remove last character (!) StringUtils. ![]() To remove the class character from a string, just use the StringUtils.substring() method. To add the library to your Maven project, add the following dependency to pom.xml file: commons-lang3 3.9 įor Gradle, add the below dependency to your adle file: implementation ':commons-lang3:3.9' One such class is the StringUtils that offers useful utility methods for string operations. The Apache Commons Lang library is a popular open-source library that provides many utility classes. The equivalent example that uses Java 8 streams to remove the last character of the string: str = Optional. To avoid this unnecessary compilation, you should use the Pattern class to compile the regular expression into a patternjava: Pattern pattern = Pattern. The replaceAll() method compiles the regular expression every time it executes. So we have to do a little more work: str = str != null & !str. Since replaceAll() is a part of the String class, it is not null-safe. replaceAll ( ".$", "" ) // print the new string System. Here is an example code snippet that removes the last character of the string using replaceAll(): String str = "Hello World!" // remove last character (!) The replaceAll() method takes two input parameters: the regular expression and the replacement string. This method replaces all occurrences of the matched string with the given string. orElse (str ) Using Regular ExpressionĪnother way to remove the last character from a string is by using a regular expression with the replaceAll() method. If you prefer to use Java 8 streams, just do the following: str = Optional. To avoid the exception, we have to explicitly check the length of the string as shown in the below example: str = str != null & !str. The substring() method is not null-safe, which means it will through an exception if the string is null or empty. Now if you execute the code, you should see the following output: Hey, there ! The second parameter is basically the ending exclusive index, calculated by taking the length of the string using the length() method and by subtracting 1 from the length. The first parameter is the starting inclusive index which is 0 in our case. println (str ) Īs you can see above, we are using substring() with two parameters. ![]() ![]() length ( ) - 1 ) // print the new string System. Here is an example: String str = "Hey, there!!" // remove last character (!) The easiest and quickest way to remove the last character from a string is by using the String.substring() method. In this quick article, we'll look at different ways to remove the last character of a string in Java.
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