String class methods in Java

Categories: Java

Many useful methods for performing operations on a sequence of char values are available in the java.lang.String class.

No.	Method	Description
1	char charAt(int index)	It returns the char value for the given index.
2	int length()	It returns the string length.
3	static String format(String format, Object… args)	It returns a formatted string.
4	static String format(Locale l, String format, Object… args)	It returns a formatted string in the locale specified.
5	String substring(int beginIndex)	For a given begin index, it returns a substring.
6	String substring(int beginIndex, int endIndex)	It returns substring for the given begin index and end index.
7	boolean contains(CharSequence s)	After matching the sequence of char values, it returns true or false.
8	static String join(CharSequence delimiter, CharSequence… elements)	It returns a joined string.
9	static String join(CharSequence delimiter, Iterable<? extends CharSequence> elements)	It returns a joined string.
10	boolean equals(Object another)	It compares the string to the given object to see if they are equal.
11	boolean isEmpty()	It determines if the string is empty.
12	String concat(String str)	The specified string is concatenated.
13	String replace(char old, char new)	All occurrences of the specified char value are replaced.
14	String replace(CharSequence old, CharSequence new)	It replaces all occurrences of the specified CharSequence.
15	static String equalsIgnoreCase(String another)	It makes a comparison with another string. It does not perform a case check.
16	String[] split(String regex)	It returns a split string that matches the regex pattern.
17	String[] split(String regex, int limit)	It returns a split string matching regex and limit.
18	String intern()	It returns an interned string.
19	int indexOf(int ch)	It returns the specified char value index.
20	int indexOf(int ch, int fromIndex)	It starts with the given index and returns the specified char value index.
21	int indexOf(String substring)	It returns the specified substring index.
22	int indexOf(String substring, int fromIndex)	It returns the specified substring index starting with the given index.
23	String toLowerCase()	It returns a string in lowercase.
24	String toLowerCase(Locale l)	It returns a string in lowercase using a specified locale.
25	String toUpperCase()	It returns a string in uppercase.
26	String toUpperCase(Locale l)	It returns an uppercase string in the specified locale.
27	String trim()	It removes the beginning and ending spaces of this string.
28	static String valueOf(int value)	It converts the specified type to a string. It’s a method that’s been overworked.

Also read about the Strings in Java

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Rabecca Fatima

Staying up to the mark is what defines me. Hi all! I’m Rabecca Fatima a keen learner, great enthusiast, ready to take new challenges as stepping stones towards flying colors.