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Methods of String in java

 String in Java

String:  A Java string is a sequence of characters that exist as an object of the class java. lang.

Here is the list of important methods available in the java string class:

Ø startsWith(): It checks if the string starts with the given prefix. If yes then return true else false.


Ø endsWith(): It checks if the string ends with the given suffix. If yes then return true else false.


Ø substring(int begin index) : It returns the substring of the string. The substring starts with the character at the specified index.


Ø  substring(Int begin index , int end index) : Returns the substring. The substring starts with the character at begin index and ends with the character at end index.

Ø toLowerCase() : It converts all the characters of the string into lower case(Small Letters). 



Ø toUpperCase() : It converts all the characters of the string into upper case(Capital Letter). 


Ø indexOf() : It returns the position of the first occurrence of the specified character or string in a specified string. 


Ø lastIndexOf() : It return the last index of the given character. 


Ø isEmpty() : This method return true if the given string has 0 length. 


Ø length() : It returns the length of a string. 


Ø equals() : Compare both the strings and return true if both matches else false. 


Ø equalsIgnoreCase() : It works the same as equals but it does a case insensitive comparison. 


Ø charAt() : It returns the character at the specified index number. 


Ø trim() : It returns the substring after eliminating leading and trailing white space from the original string. 




Ø concat() : Concatenates the specified string at the end of the string. 


 

Ø contains() : It checks whether a string contains the specified sequence of a character value. If yes then it returns true else false. 

Ø replace() : it returns a string after replacing all old characters with a new character.  

 

 

 


 

 

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