Type, Method: Description

char, charAt(int index): Returns the character at the given string index.

int, compareTo(String anotherString): Compares a string to another string.

String, concat(String str): Joins two strings.

boolean, equals(Object anObject): Compares a string to another object.

boolean, equalsIgnoreCase(String anotherString): Compares a string to another object with no regard for upper- or lowercase.

int, indexOf(String str): Finds the index of the first occurrence of a given character or substring in a string.

int, lastIndexOf(int ch): Finds the index of the last occurrence of a given character or substring in a string.

int, length(): Returns the length of a string.

String, replace(char oldChar, char newChar): Replaces all occurrences of a given character with a new character.

boolean, startsWith(String prefix): Checks a string for the given prefix.

String, substring(int beginIndex, int endIndex): Returns a substring of a string.

String, toLowerCase(): Converts all characters in the string to lowercase.

String, toUpperCase(): Converts all characters in the string to uppercase.

String, trim(): Removes whitespace characters from the beginning and end of a string.

static String, valueOf(int i): Returns a string representation of an int argument.

RemainingStringClass for the curious. The most important ones are the ones listed here for the purpose of the lab9.