Java Collections And Data Structures ( java.util package )

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Java ArrayList Examples

• Add an element to specified index of Java ArrayList Example
• Append all elements of other Collection to Java ArrayList Example
• Copy all elements of Java ArrayList to an Object Array Example
• Get Size of Java ArrayList and loop through elements Example
• Get Sub List of Java ArrayList Example
• Insert all elements of other Collection to Specified Index of Java ArrayList Example
• Iterate through elements Java ArrayList using Iterator Example
• Iterate through elements Java ArrayList using ListIterator Example
• Java ArrayList Example
• Remove all elements from Java ArrayList Example
• Remove an element from specified index of Java ArrayList Example
• Replace an element at specified index of Java ArrayList Example
• Search an element of Java ArrayList Example
• Sort elements of Java ArrayList Example

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Arrays

• Compare Two Java boolean Arrays Example
• Compare Two Java byte Arrays Example
• Compare Two Java char Arrays Example
• Compare Two Java double Arrays Example
• Compare Two Java float Arrays Example
• Compare Two Java int Arrays Example
• Compare Two Java long Arrays Example
• Compare Two Java short Arrays Example
• Create List from Java Object Array Example

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Collections

• Copy Elements of ArrayList to Java Vector Example
• Copy Elements of One Java ArrayList to Another Java ArrayList Example
• Copy Elements of One Java Vector to Another Java Vector Example
• Copy Elements of Vector to Java ArrayList Example
• Create Java ArrayList From Enumeration Example
• Create List containing n Copies of Specified Object Example
• Find Minimum element of Java ArrayList Example
• Find Minimum element of Java HashSet Example
• Find Minimum element of Java Vector Example
• Find maxmimum element of Java ArrayList Example
• Find maxmimum element of Java HashSet Example
• Find maxmimum element of Java Vector Example
• Get Enumeration over Java ArrayList Example
• Get Enumeration over Java HashSet Example
• Get Enumeration over Java Vector Example
• Get Synchronized List from Java ArrayList example
• Get Synchronized Map from Java HashMap example
• Get Synchronized Map from Java TreeMap example
• Get Synchronized Set from Java HashSet example
• Get Synchronized Set from Java TreeSet example
• Iterate Over Unmodifiable Collection
• Perform Binary Search on Java ArrayList Example
• Perform Binary Search on Java Vector Example
• Replace All Elements Of Java ArrayList Example
• Replace All Elements Of Java Vector Example
• Replace all occurrences of specified element of Java ArrayList Example
• Replace all occurrences of specified element of Java Vector Example
• Reverse order of all elements of Java ArrayList Example
• Reverse order of all elements of Java Vector Example
• Shuffle elements of Java ArrayList example
• Shuffle elements of Java Vector example
• Swap elements of Java ArrayList example
• Swap elements of Java Vector example

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Comparator

• Sort Java ArrayList in descending order using comparator example
• Sort Java Vector in descending order using comparator example

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Enumeration

• Enumerate through a Vector using Java Enumeration Example

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Hashmap

• Check if a particular key exists in Java HashMap example
• Check if a particular value exists in Java HashMap example
• Get Set view of Keys from Java HashMap example
• Get Size of Java HashMap Example
• Iterate through the values of Java HashMap example
• Remove all values from Java HashMap example
• Remove value from Java HashMap example
• Simple Java HashMap example

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HashSet

• Check if a particular element exists in Java HashSet Example
• Copy all elements of Java HashSet to an Object Array Example
• Get Size of Java HashSet Example
• Iterate through elements of Java HashSet example
• Remove all elements from Java HashSet example
• Remove specified element from Java HashSet example
• Simple Java HashSet example

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Hashtable

• Check if a particular key exists in Java Hashtable example
• Check if a particular value exists in Java Hashtable example
• Create Java Hashtable from HashMap example
• Get Collection of Values from Java Hashtable example
• Get Set view of Keys from Java Hashtable example
• Get Size of Java Hashtable Example
• Iterate through keys of Java Hashtable example
• Iterate through values of Java Hashtable example
• Remove all values from Java Hashtable example
• Remove value from Java Hashtable example
• Simple Java Hashtable example

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Iterator

• Iterate through a Collection using Java Iterator Example
• Remove an element from Collection using Java Iterator Example

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LinkedHashMap

• Check if a particular key exists in Java LinkedHashMap example
• Check if a particular value exists in Java LinkedHashMap example
• Get Set view of Keys from Java LinkedHashMap example
• Get Size of Java LinkedHashMap Example
• Iterate through the values of Java LinkedHashMap example
• Remove all values from Java LinkedHashMap example
• Remove value from Java LinkedHashMap example
• Simple Java LinkedHashMap example

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LinkedHashSet

• Check if a particular element exists in Java LinkedHashSet Example
• Copy all elements of Java LinkedHashSet to an Object Array Example
• Get Size of Java LinkedHashSet Example
• Iterate through elements of Java LinkedHashSet example
• Remove all elements from Java LinkedHashSet example
• Remove specified element from Java LinkedHashSet example
• Simple Java LinkedHashSet example

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LinkedList

• Add elements at beginning and end of LinkedList Java example
• Check if a particular element exists in LinkedList Java example
• Create an object array from elements of LinkedList Java example
• Get SubList from LinkedList Java example
• Get elements from LinkedList Java example
• Get first and last elements from LinkedList Java example
• Insert an Element into LinkedList Java example
• Iterate through elements of Java LinkedList using Iterator example
• Iterate through elements of Java LinkedList using ListIterator example
• Remove all elements or clear LinkedList Java example
• Remove first and last elements of LinkedList Java example
• Remove range of elements from LinkedList Java example
• Remove specified element from LinkedList Java example
• Replace an Element of LinkedList Java example
• Search elements of LinkedList Java example
• Simple Java LinkedList example

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ListIterator

• Add or insert an element to ArrayList using Java ListIterator Example
• Get Previous and next index using Java ListIterator Example
• Remove an element from ArrayList using Java ListIterator Example
• Replace an element from ArrayList using Java ListIterator Example
• Traverse through ArrayList in forward direction using Java ListIterator Example
• Traverse through ArrayList in reverse direction using Java ListIterator Example

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Searching

• Performing Binary Search on Java byte Array Example
• Performing Binary Search on Java char Array Example
• Performing Binary Search on Java double Array Example
• Performing Binary Search on Java float Array Example
• Performing Binary Search on Java int Array Example
• Performing Binary Search on Java long Array Example
• Performing Binary Search on Java short Array Example

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Sorting

• Java Sort byte Array Example
• Java Sort char Array Example
• Java Sort double Array Example
• Java Sort float Array Example
• Java Sort int Array Example
• Java Sort long Array Example
• Java Sort short Array Example

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TreeMap

• Check if a particular key exists in Java TreeMap example
• Check if a particular value exists in Java TreeMap example
• Get Head Map from Java TreeMap example
• Get Set view of Keys from Java TreeMap example
• Get Size of Java TreeMap Example
• Get Sub Map from Java TreeMap example
• Get Tail Map from Java TreeMap example
• Get lowest and highest key stored in Java TreeMap example
• Iterate through the values of Java TreeMap example
• Remove all values from Java TreeMap example
• Remove value from Java TreeMap example
• Simple Java TreeMap example

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TreeSet

• Check if a particular value exists in Java TreeSet example
• Copy all elements of Java TreeSet to an Object Array Example
• Get Head Set from Java TreeSet example
• Get Size of Java TreeSet Example
• Get Sub Set from Java TreeSet example
• Get Tail Set from Java TreeSet example
• Get lowest and highest value stored in Java TreeSet example
• Iterate through elements of Java TreeSet example
• Remove all elements from Java TreeSet example
• Remove specified element from Java TreeSet example
• Simple Java TreeSet example

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Vector

• Add an element at specified index of Java Vector Example
• Append all elements of other Collection to Java Vector Example
• Copy all elements of Java Vector to an Object Array Example
• Get Size of Java Vector and loop through the elements Example
• Get Sub List of Java Vector Example
• Insert all elements of other Collection to Specified Index of Java Vector Example
• Iterate through elements Java Vector using Iterator Example
• Iterate through elements Java Vector using ListIterator Example
• Remove all elements from Java Vector Example
• Remove an element from specified index of Java Vector Example
• Remove specified element from Java Vector Example
• Replace an element at specified index of Java Vector Example
• Search an element of Java Vector Example
• Search an element of Java Vector from specific index Example
• Set size of Java Vector Example
• Simple Java Vector Example
• Sort elements of Java Vector Example

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File And IO

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Buffered Input Stream Examples

• Read File Using Java BufferedInputStream Example
• Read File in String Using Java BufferedInputStream Example

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Buffered Output Stream Examples

• Write byte array to file using BufferedOutputStream
• Write byte to file using BufferedOutputStream

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Byte Array InputStream Examples

• Read byte array using ByteArrayInputStream Example
• Read partial byte array using ByteArrayInputStream Example

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DataInputStream Examples

• Read boolean from file using DataInputStream
• Read byte array from file using DataInputStream
• Read byte from file using DataInputStream
• Read char from file using DataInputStream
• Read double from file using DataInputStream
• Read float from file using DataInputStream
• Read int from file using DataInputStream
• Read long from file using DataInputStream
• Read short from file using DataInputStream
• Read unsigned byte from file using DataInputStream

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Data Output Stream Examples

• Create DataOutputStream from FileOutputStream
• Determine number of bytes written to DataOutputStream
• Flush output stream
• Write String as bytes to a file using DataOutputStream
• Write String as characters to a file using DataOutputStream
• Write boolean to a file using DataOutputStream
• Write byte to a file using DataOutputStream
• Write char to a file using DataOutputStream
• Write double to a file using DataOutputStream
• Write float to a file using DataOutputStream
• Write int to a file using DataOutputStream
• Write long to a file using DataOutputStream
• Write short to a file using DataOutputStream

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File And Directory Examples

• Compare two file paths
• Construct file path
• Create directory
• Create directory along with required nonexistent parent directories
• Create new empty file
• Create temporary file
• Create temporary file in specified directory
• Delete file or directory
• Delete file or directory when virtual machine terminates
• Determine File or Directory
• Determine if File or Directory is hidden
• Determine if a file can be read
• Determine if a file can be written
• Determine if file or directory exists
• Get Absolute path of the file
• Get File size in bytes
• Get Last modification time of a file or directory
• Get name of parent directory
• Get name of specified file or directory
• Get parent directory as a File object
• List Filesystem roots
• List contents of a directory
• Mark file or directory Read Only
• Rename file or directory
• Set last modified time of a file or directory

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FileInputStream Examples

• Read file in byte array using FileInputStream
• Read file using FileInputStream
• Skip n bytes while reading the file using FileInputStream

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FileOutputStream Examples

• Append output to file using FileOutputStream
• Copy binary file using Streams
• Create FileOutputStream object from File object
• Create FileOutputStream object from String file path
• Write byte array to a file using FileOutputStream
• Write file using FileOutputStream

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InputStream Examples

• Read character from console using InputStream
• Read line of characters from console using InputStream

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Pushback Input Stream Example

• Java PushbackInputStream Example

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Wrapper Classes And Other Classes Of java.lang Package

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BigInteger

• Find Square Root of BigInteger Example

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Boolean Wrapper Class

• Convert Java Boolean object to boolean primitive example
• Convert Java String Object to Boolean Object
• Convert Java boolean Primitive to Boolean object
• Convert java Boolean object to String object Example
• Java Boolean Example

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Byte Wrapper Class

• Convert Byte object to String object
• Convert Byte to numeric primitive data types example
• Convert Java String to Byte example
• Convert String to primitive byte Example
• Convert byte to Byte object Example
• Java Byte Example

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Double Wrapper Class

• Convert Double object to String object
• Convert Java String to Double example
• Convert java Double to numeric primitive data types example
• Convert java double to Double object Example
• Java Double Example
• Java Double compare example
• Java Double isInfinite example
• Java Double isNaN method example

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Float Wrapper Class

• Convert Java Float Object to String Object Example
• Convert Java Float to Numeric Primitive Data Types Example
• Convert Java String to Float Object Example
• Convert Java float Primitive Value to Float Object Example
• Java Float Compare Example
• Java Float Wrapper Class Example
• Java Float isInfinite Method Example
• Java Float isNaN Method Example

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Integer Wrapper Class

• Convert Integer to Java String object
• Convert Java Integer object to Numeric primitive types
• Convert Java String to Integer object Example
• Convert String to int Example
• Convert binary number to decimal number example
• Convert decimal integer to binary number example
• Convert decimal integer to hexadecimal number example
• Convert decimal integer to octal number example
• Convert hexadecimal number to decimal number example
• Convert java int to Integer object Example
• Convert octal number to decimal number example
• Simple Java Integer Example

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Long Wrapper Class

• Convert Java String to Long example
• Convert Long object to String object
• Convert Long to numeric primitive data types example
• Convert String to long Example
• Convert long primitive to Long object Example
• Java Long Example

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Math Class

• Find absolute value of float, int, double and long using Math.abs
• Find ceiling value of a number using Math.ceil
• Find exponential value of a number using Math.exp
• Find floor value of a number using Math.floor
• Find maximum of two numbers using Math.max
• Find minimum of two numbers using Math.min
• Find natural logarithm value of a number using Math.log
• Find power using Math.pow
• Find square root of a number using Math.sqrt
• Generate Random Int Within Given Range Example
• Generate random numbers using Math.random
• Round Java float and double numbers using Math.round

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Short Wrapper Class

• Convert Java String to Short example
• Convert Short object to String object
• Convert Short to numeric primitive data types example
• Convert String to short primitive Example
• Convert short primitive to Short object Example
• Java Short Example

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