Java String Constant Pool
Learn about String class in Java, the motivation behind making it immutable and the whole idea about String constant pool. We will see how memory …
Java String class
Strings, which are widely used in Java programming, are a sequence of characters. In the Java programming language, strings are objects. The String class represents character strings. All string literals in Java programs, such as “abc”, are implemented as instances of this class.
The String class is immutable, so that once it is created a String object cannot be changed. If there is a necessity to make a lot of modifications to Strings of characters, then you should use String Buffer & String Builder Classes.
The class String includes methods for examining individual characters of the sequence, for comparing strings, for searching strings, for extracting substrings, and for creating a copy of a string with all characters translated to uppercase or to lowercase. Case mapping is based on the Unicode Standard.
Java format string to phone number with dashes – (123) 456-6789 pattern
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Learn to format string to phone number pattern which is (123) 456-6789. This conversion is generally required in applications where customer’s data has to be …
Get first 4 characters of String in Java
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Learn how to get first 4 characters of a String or simply any number of first characters of a string in Java. Get first 4 …
Get last 4 characters of String in Java
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Learn how to get last 4 characters of a String or simply any number of last characters of a string in Java.
Java String intern() method example
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The Java String intern() return the reference of a equal string literal present in string pool. String literals are automaically interned in Java.
Java String contains() method example
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The Java String contains() searches a substring in the given string. It returns true if substring are found in this string otherwise returns false. 1. …
Java String toLowerCase() method example
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Java String toLowerCase() returns a string which is result of converting all characters in given string to lowercase. Convert string to lowercase in Java.
Java String toUpperCase() method example
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The Java String toUpperCase() returns a string which is result of converting all characters in given string to UPPERCASE. Read more: Java example capitalize the …
Java String split()
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The split()method in java.lang.String class returns a string array after it splits the given string around matches of a given the regular expression. In this …
Java String replaceAll() method example
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The Java String replaceAll() returns a string after it replaces each substring of that matches the given regular expression with the given replacement. 1. String …
Java String replaceFirst() method example
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The Java String replaceFirst() method replaces the first substring ‘regex’ found that matches the given argument substring (or regular expression) with the given replacement substring. …
Java String replace() method example
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The Java String replace() method replaces each substring of this string that matches the literal target substring. The matching process starts at index 0.
Java String concat() method example
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The Java String concat() method concatenates the method argument string to the end of string object. 1. String concat(String str) method Internally, Java creates a …
Java String substring()
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Java String substring() example. Learn to get substring of a string from given start index to end index. A valid index is between 0 and length of string.
Java String lastIndexOf() method example
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Java String lastIndexOf() method. It returns the last index of specified character or string as method argument. If argument is not found it returns -1.
Java String indexOf() method example
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The Java String indexOf() method returns the index of given character or string as method argument. If argument is not found in string, method returns -1. The index counter for a string starts from zero.
Java String hashCode() method example
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Java String hashCode() method returns the hash code for the String. Hash code value is used in hashing based collections like HashMap, HashTable etc. This …
Java String endsWith() method example
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Java String endsWith() method is used to check the suffix of the string. It verifies if given string ends with argument string or not. 1. …
Java String startsWith() example
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Java String startsWith() method check if a string starts with prefix argument string. does not accept regex as argument. null argument is also not allowed.
Java String compareToIgnoreCase() method example
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Java String compareToIgnoreCase() example compares two strings lexicographically ignoring case. Difference in compareToIgnoreCase() vs equalsIgnoreCase().