this series contains string, stingbuffer and stringbuilder related entries.
Java designers noticed the importance of split() method in a programming language (which already exists in other languages like JavaScript etc.) and introduced in Java from JDK 1.4. The same splitting of a string into independent words or tokens is done in earlier versions using StringTokenizer. Usage of split() in place of StringTokenizer is very …
java.lang.String class comes with many methods to check two strings contain same characters in the same sequence. To do this, String class comes with equals(), compareTo(), equalsIgnoreCase() and compareToIgnoreCase() methods. This tutorial is on compareTo() String. Now we discuss compareTo() String method. Following is the method signature as defined in String class. public int compareTo(String …
java.lang.String class comes with many methods to check two strings contain same characters in the same sequence. To do this, String class comes with equals(), compareTo(), equalsIgnoreCase() and compareToIgnoreCase() methods. This is tutorial is on compareToIgnoreCase() String. We have seen earlier compareTo() method which does case-sensitive comparison lexicographically. Now we discuss compareToIgnoreCase() method which does …
We know earlier equals() method is used to compare two strings whether they have same sequence of characters or not. But this method cannot compare String with StringBuffer. Even if they have same characters, the equals() returns false. In this case use contentEquals() String. contentEquals() String method is useful to compare String with StringBuffer or …
java.lang.String class comes with many methods to manipulate string. The methods are a boon to Programmers without which would have been a laborious code like C/C++. Present method is getChars() String. getChars() copies the characters of a sting to a character array. Or, a string can be converted into a character array. Following is the …
Many methods exist in java.lang.String class used for different string manipulations like checking the availability of a character, to extract a part of a string or to convert a data type to string etc. The present method is on getBytes() String. getBytes() returns a byte array where elements are ASCII (depends on charset encoding) values …
Many methods exist in java.lang.String class used for different string manipulations like checking the availability of a character, to extract a part of a string or to convert a data type to string etc. One such simple method is indexOf() String. indexOf() method checks the existence of a single character or a group of characters …
To reverse a string with less code in Java, there comes reverse() method in StringBuffer class. reverse() method cannot be used directly on string as reverse() is not defined in String class but defined in StringBuffer and StringBuilder. String should be converted to StringBuffer and then applied reverse() method. 1. Reversing using reverse() method. public …
Java String reverse with and without reverse() Example Read More »
java.lang.String class comes with toCharArray() String method to convert string to a character array. The signature is given of toCharArray() String as defined in Java API. public char[] toCharArray(): Returns a character array comprising the string characters as elements. In the following toCharArray() String is used to get a char array out of string. public …
java.lang.String class comes with many methods towards increasing performance. Think of comparing two strings for their equality, each having 1000 characters. Comparing each character in a for loop is a time cosuming process where performance is lost. Java comes with an idea. Each string is converted into an integer value (following some formula) and then …
In Java, a String object can be created a number of ways. The most frequently used styles are shown here using 9 types of String constructors (including StringBuffer and StringBuilder) defined java.lang.String API. The 9 constructors are 1. public java.lang.String(); 2. public java.lang.String(java.lang.String); 3. public java.lang.String(char[]); 4. public java.lang.String(char[], int startIndex, int numChars); 5. public …
Java comes with toUpperCase() and toLowerCase() methods that converts all the characters of the string into uppercase or lowercase. String Capitalize example keeps all String characters in capital letters. Following are the method signatures. String toLowerCase(): Converts all the characters of the string into lowercase. Returns a string with all lowercase letters. Remember, the original …
We know earlier, the + operator is implicitly overloaded in Java – works for addition and concatenation. For concatenation, String class includes concat() method. That is, strings can be concatenated both with + operator an concat() method. Following program illustrates. public class Concat { public static void main(String args[]) { String s1 = “to”; String …
length vs length() vs size(): All the three length, length() and size() give the number of elements present but in different contexts. A) length variable: In Java, array (not java.util.Array) is a predefined class in the language itself. To find the elements of an array, designers used length variable (length is a field member in …
In Java, a String Array is nothing but an array of String objects. Elements are simply strings. In Java, an array can be created with primitive data types and also objects. Objects can be of any type, even Employee objects. As String is a class and we can be an object of String, an array …
After knowing the differences between String, StringBuffer and StringBuilder, let us Convert StringBuffer to String and vice versa. It is very much required in coding. Convert StringBuffer to String A StringBuffer object can be converted to String using toString() method of Object class. StringBuffer sb1 = new StringBuffer(“hello”); StringBuffer sb2 = new StringBuffer(“hello”); String str1 …
Existence of a substring in the main string can be checked with String contains() method. public class Demo { public static void main(String args[]) { String str1 = “abcdefghi”; // string (main string) String str2 = “def”; // another string (substring) String str3 = “ded”; // another string (substring) boolean b = str1.contains(str2); // checks …
Static Final String Java: A string can be declared both static and final. The advantages of declaring string with the both access specifiers are narrated hereunder. The advantages are inclusive of both the affects of final and static. 1. A string declared final cannot be reassigned. The string works as a constant. 2. A string …
String convert byte array char array Summary: Many a times it is required to convert the string characters into a char array or byte array; of course, very often, the reverse is also required. Discussed at length in this tutorial "String convert byte array char array". Program converting strings to char array and byte array …
Three classes exist in java.lang package to manipulate strings – String, StringBuffer and StringBuilder. Even though all the three are used for manipulating strings only but they differ in many aspects and specifically used in the code where demanded. Following tables give the differences between these and when to use. Now let us tabulate the …
