Strings in Java

STRINGS

String are used to store text within double quotes.

Generally ,String is a collection of characters .But in java,string is an object that represents a sequence of character.

Example:

String greeting = ''Hello World'';

STRING CLASS METHODS:

string method

• Length[]- It returns string length.

• toLowerCase[]- It returns a string in lowercase using specified locale.

• toUpperCase[]- It returns a string in uppercase using specified locale. 

• Trim[]- It removes beginning and ending spaces of this string.

• Concat[]- It concatenates the specified string.

• Equals[]- It checks the equality of string within the given object.

• Replace[]- It replace all occurences of the specified curve value.

• CharAt()- It returns char values for the particular index.

• CompareTo()- It compares another string, it doesn't check case.

• Substring(index)- It returns the specified substring index.

• Valueof[]- It converts given type into string, it is an overloaded method.

• Boolean[]- It returns true or false after matching the sequence of char values.

• Indexof[]- It returns the specified char value index starting with given index.

STRING BUFFERS METHODS:

string buffer

• Capacity()-It is used to return current capacity.

• Append()-  It is used to append the specified string with this string. The append() method is overloaded like append(char), append(boolean), append(int), append(float), append(double).

• Insert()- It is used to insert the specified string with this string at the specified position. The insert() method is overloaded like insert(int, char), insert(int, boolean), insert(int, int), insert(int, float), insert(int, double).

• Replace()-It is used to replace the string from specified startIndex and endIndex.

• Delete()- It is used to delete the string from specified startIndex and endIndex.

• Reverse()-It is used to reverse the string.

• CharAt()- It is used to return the character at the specified position.

• Length()-It is used to return the length of the string.

• Substring (int beginIndex)-It is used to return the substring from the specified beginIndex.

• Substring(int beginIndex, int endIndex)- It is used to return the substring from the specified beginIndex and endIndex.