Date Operations
How to add weeks to a date in Java?
How to add months to a date in Java?
How to add years to a date in Java?
How to check if a given date is after today in Java?
How to check if a given date is before today in Java?
How to format date object in to specific date format?
How to find day of the week for a given date?
How to find the number of days between 2 dates?
How to find earliest date between 2 dates or a given set of dates?
How to find latest date between 2 dates or a given set of dates?
How to check if a given year is a leap year?
How to find end date of month in any given year?
How to find if the month and year of 2 dates are equal?
How to find a particular occurence of a week day in a month?
How to convert String date to a Calendar?
How to convert a String date to a util date object?
How to format time as AM/PM?
Collection Handling
How to copy or extend an array into another array?
How to find the number of a particular value object in a collection?
How to convert string to array?
How to convert string to array list?
String Manipulations
How to validate email address?
How to validate a phone number?
How to validate a SSN?
How to check if a string contains only alphabets?
How to convert a comma separated string to string array?
File Operations
How to write data to a file?
How to create a date based directory?
How to search for a file in Java?
How to convert input stream to text?
Mathematical Functions
How to find the highest number in a set of numbers?
How to find the least number in a given set of numbers?
How to validate a number?
How to generate a range of tokenized numbers?
Database Operations
How to get Oracle database connection using Java?
Miscellaneous
How to execute a external command from Java?
How to to replace special characters with URL encoders?