this series contains string, stingbuffer and stringbuilder related entries.
Java String Immutable Comparison Summary: At the end of this tutorial "Java String Immutable Comparison", you will understand the meaning of immutable. Also you will come to know the styles of comparing Java strings. String handling and string manipulation play a vital role in programming. The simplicity in handling makes a language more programmer-friendly. Java …
Comparing Strings with equals() equalsIgnoreCase() String. First and foremost important operation on strings is to compare whether two strings are same or not. There are three styles which the programmer should be well aware of when to use what. The styles are Using logical equals to (==) Using equals() and equalsIgnoreCase() Using lexicographical order, compareTo() …
java.lang.String class comes with toLowerCase() String method to convert all uppercase letters into lowercase in the string. After modification, a new string is returned with all the conversions. The signature of toLowerCase() String is given as defined in Java API. public String toLowerCase(): Returns a new string after converting all the uppercase letters to lowercase …
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. Present method is on length() String. Here is a simple length() method that returns the number of characters present in the …
java.lang.String class comes with concat() String method to concatenate two strings. The signature is given as defined in String class. public String concat(String str): Returns a new string, the result of concatenation of two strings. Following example concat() String illustrates the usage concat() method. public class StringMethodDemo { public static void main(String args[]) { String …
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. Present topic is on method lastIndexOf() String. lastIndexOf() method checks the existence of a single character or a group of characters …
The String class comes with many helper methods with which Java string manipulation becomes easier. Forget the laborious days of C/C++. One such utility method is startsWith() String. The present method startsWith(String str) checks the given string starts with a few characters like str or not. If starts with characters str, the method returns true …
Java String class comes with many string utility methods with which string manipulation becomes easier. Read these methods and you will remember the laborious days of C/C++. One such method is endsWith() String. The present method endsWith(String str) checks the given string ends with a few characters like str or not. If ends with characters …
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 charAt() String. charAt(int index) extracts a single character from a string. Following is the method signature of …
java.lang.String class comes with toUpperCase() String method to convert all lowercase letters into uppercase in the string. After modification, a new string is returned with all the conversions. The signature toUpperCase() String is given as defined in Java API. public String toUpperCase(): Returns a new string after converting all the lowercase letters to uppercase letters …
Here, we use the overloaded methods of substring() to extract the whole or a part of a string. Following is the signature of overloaded substring() method as defined in String class. String substring(int indexNum): Returns a string containing all the characters existing from indexNum to the end in the given string. String substring(int indexNum1, int …
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 substring() String. substring(int) and substring(int, int) extracts part of a string. substring() method is overloaded 2 times …
After seeing replace() method in String, let us study another similar method replaceFirst() String. What Java API says about the method: String replaceFirst (String str, String replaceString): Replaces the first occurrence of str in the original string(calling string) with replaceString, The original string is not getting disturbed, but the returned string gets effected. See example. …
java.lang.String class comes with trim() String method to remove both leading and trailing whitespaces in the string. After trimming, a new string is returned. The signature of trim() String is given as defined in Java API. public String trim(): Returns a new string after deleting both prefix and suffix whitespaces in the given string. Original …
Here, we do some miscellaneous operations on strings like converting a string from lowercase to uppercase or vice versa, removing unwanted prefix and suffix whitespaces and replacing a few characters with replace() String. Supported methods from String class. String toLowerCase(): Returns a new string containing all lowercase characters. All the uppercase characters are converted into …
toUpperCase(), toLowerCase() and replace() String Read More »
This String class method, replaceAll(), replaces all the occurrences of a word in a string with another word introduced with JDK 1.4 to use with regular expressions. The method returns a new string with affected words. The original string is not disturbed (string is immutable). We discussed a similar program in "String – uppercase, lowercase, …
java.lang.String class comes with replace() String method to replace existing characters in a sting with new characters. The signature of replace() String as given in Java API. public String replace(char oldChar, char newChar): Returns a new string after replacing characters. All the occurrences of oldChar in the string are replaced by newChar. In the following …
java.lang.String class comes with overloaded split() String method to split a string into tokens. Introduced in JDK 1.4, earlier done with SringTokenizerr. The signature of split() String Example is given as defined in Java API. public String[] split(String regex): Returns an array of string words after splitting the string into words. Introduces with JDK 1.4. …
To Java String find matching, we use three methods – overloaded indexOf() and lastIndexOf() and charAt(). Index numbers are given by the JVM implicitly to the characters in the string; the first character is given 0, the second one as 1 and so on. These index numbers are helpful in programming in searching operations. Following …
Java String Find matching characters indexOf(), lastIndexOf() Read More »
The String class is rich with abundant methods used in coding. One of the methods is overloaded regionMatches() used to find the existence of a few characters of one string in another. Supported methods from String class. boolean regionMatches(int positionFirstString, String secondString, int positionSecondString, int num): Returns a boolean value of true if the region …
