This post gives an insight into the Java String intern() method which is closely associated with the concept of “interning” strings in Java and maintaining a String pool in Java. String interning in Java In Java, string literals are “interned” so as to share unique instances. A pool of strings,…
To check if a String is null or empty in Java you can use one of the following options. Use isEmpty() method available Java 6 onward to check if the String is empty. Use StringUtils.isEmpty() method of the Apache Commons Lang. From Java 11 onward there is also isBlank() method…
If you want to get specific character of the String by index you can use charAt() method of the String class in Java. charAt() method char charAt(int index)– Returns the char value at the specified index. For a String of length n the passed index should be with in the…
In this post you’ll learn how to change case of the String in Java using toLowerCase() and toUpperCase() methods. toLowerCase() method in Java String String toLowerCase()– Used to convert all of the characters in this String to lower case. If no argument is passed then rules of the default locale…
In this post you’ll learn how to remove spaces from a String in Java, the spaces may be leading spaces, trailing spaces or spaces in between the words. String class provides following options for removing String spaces in Java. If you want to remove spaces at the beginning (leading spaces)…
If you have to get a part of the original String i.e. substring in Java then you can use substring() method of the Java String class. Java substring() method There are two variants of the substring() method- String substring(int beginIndex)– Returns a substring of this string where the substring begins…
If you want to check if given string is present in another string then in Java you have following options- Use indexOf() method to find the first occurrence of the specified character or substring. See example. Use lastIndexOf() method to get index within this string of the last occurrence of…
If you have to compare two Strings in Java or the portion of two Strings on the basis of the content of those Strings then you can do it using one of the following methods- equals() method or equalsIgnoreCase() if you don’t want to consider case. See example. compareTo() method…
In a multi-threaded environment shared object can be modified by any of the thread, in some scenarios you may want to ensure that the original object shared among the threads remain unchanged. That can be done by making that object immutable. Since String in Java is immutable by design so…
While working with Hibernate you might have encountered the following error- org.hibernate.LazyInitializationException could not initialize proxy – no Session In this tutorial we’ll see why this error comes up and what is the best way to fix it. Why LazyInitializationException : could not initialize proxy You may encounter this error…
