String Methods |
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| Return Value |
Method | Functionality |
| String | toUpperCase( ) | Converts all of the characters in this String to upper case using the rules of the default locale. |
| String | toLowerCase( ) | Converts all of the characters in this String to lower case using the rules of the default locale. |
| String | substring(int beginIndex) | Returns a new string that is a substring of this string. |
| String | substring(int beginIndex, int endIndex) | Returns a new string that is a substring of this
string.
It is important to note that the character at the endIndex position is not taken as part of the substring. |
| String | concat(String str) | Concatenates the specified string to the end of this string. |
| char | charAt(int index) | Returns the character at the specified index. |
| boolean | equals(Object anObject) | Compares this string to the specified object. |
| boolean | equalsIgnoreCase(String anotherString) | Compares this String to another String, ignoring case considerations. |
| int | length( ) | Returns the length of this string. |
| String | trim( ) | Returns a copy of the string, with leading and trailing whitespace omitted. |
| int | indexOf(String str) | Returns the index within this string of the first occurrence of the specified substring. |
| String | replace(char oldChar, char newChar) | Returns a new string resulting from replacing all occurrences of oldChar in this string with newChar. |
- - - - - - - - -Strings are immutable.- - - - - - - -