Java Tutorial

Java String substring Well, as the name of the method says, this is going to give a substring of the specified string. But we need to really look for what arguments are being passed to this method. We are only passing the beginning index to this method, so, we are going to get the substring […]

Java String Split Well, as the name of the method suggests, this method is going to split the string, over some given regular expression. This method returns the array of the strings split over the given regular expression. Here is an example, where we split the string over space. So every time we find a

Java String Contains With this method, we can know whether or not the specified string contains the given character sequence. This is like finding whether plain is present in ”complaint”, and we have a true output. Well, let’s have a simple program for understanding the method and observing output – public class StringMethods {public static

StripTrailing Method With this method, we can cut the trailing whitespaces (the whitespaces at the end) from the string. Have a look at the below program and try to implement it and observe the results. public class StringMethods {public static void main(String[] args) {String spaces = ” Java “;System.out.println(spaces.stripTrailing());}}

Java String StripLeading Well, as the name says, this method is going to cut the leading whitespaces, which means the whitespaces that are at the start. Let’s have an example program to demonstrate the same – public class StringMethods {public static void main(String[] args) {String spaces = ” Java “;System.out.println(spaces.stripLeading());}} Well, if you try running

Java String Strip Well, with this method, we can cut the whitespaces from the start and the end of the string. Have a look at the program below to understand the thing. This works similarly to the trim method. public class StringMethods {public static void main(String[] args) {String spaces = ” Java “;System.out.println(spaces);System.out.println(spaces.strip());}} So, executing

Java String Trim Well, with this method, we can cut down the spaces before and after the string. Let’s discuss a problem where you might want to use this method. Just consider that you are writing a program where you are taking a user input string, and if the user inputs hi, you output as

Java String startsWith Well, previously, we had seen some methods to see whether our string ends with some string. Well, this method finds whether or not our string starts with some string. Let’s have an example to understand the same – public class StringMethods {public static void main(String[] args) {String str1 = “Welcome to GyaniPandit”;System.out.println(str1.startsWith(“Welcome”));}}

Java String ReplaceAll Well, with this method, we can replace some regular expressions with some replacement strings. We can replace some old characters with some new characters as well, similar to what we just did above. The thing is that we can do a lot more here. Here is a program to do the same

Java String Replace As the name of the method says, with this method, we can replace some specified old characters from the string, with the specified new character. This is like saying – hey… find all the c from the string and change them to g. Well, here, c is the old character, and g