Java string class methods

S.No. Method Description
 1. public boolean equals(Object anObject) Compares this string to the specified object.
 2. public boolean equalsIgnoreCase(String anotherString) Compares this String to another String, ignoring case.
 3. public String concat(String str) Concatenates the argument string to the end of this string.
 4. public int compareTo(String str) Compares two strings lexicographically.
 5. public int compareToIgnoreCase(String str) Compares two strings lexicographically, ignoring case.
 6. public String substring(int beginIndex) Returns a new string that is a substring of this string.
 7. public String substring(int beginIndex,int endIndex) Returns a new string that is a substring of this string.
 8. public String toUpperCase() Converts all of the characters in this String to upper case.
 9. public String toLowerCase() Converts all of the characters in this String to lowercase.
 10. public String trim() Returns a copy of the string, with leading and trailing whitespace omitted.
 11. public boolean startsWith(String prefix) Test if this string starts with the specified prefix.
 12. public boolean endsWith(String suffix) Test if this string ends with the specified suffix.
 13. public char charAt(int index) Returns the char value at the specified index.
 14. public int length() Returns the length of this string.
 15. public String intern() Returns a canonical representation for the string object.
16 public int indexOf(String str) Returns the index of the first occurrence of the specified substring within this string.
17 public int lastIndexOf(String str)

 

Returns the index of the last occurrence of the specified substring within this string.
18 public String toString() This object (which is already a string!) is itself returned.