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Java // remove elements from the linked list ll.remove("F"); ll.remove(2); System.out.println("Contents of ll after deletion: " + ll); // remove first and last elements ll.removeFirst(); ll.removeLast(); System.out.println("ll after deleting first and last: " + ll); } } // get and set a value Object val = ll.get(2); ll.set(2, (String) val + " Changed"); System.out.println("ll after change: " + ll); This will produce the following result: Original contents of ll: [A, A2, F, B, D, E, C, Z] Contents of ll after deletion: [A, A2, D, E, C, Z] ll after deleting first and last: [A2, D, E, C] ll after change: [A2, D, E Changed, C] The ArrayList Class The ArrayList class extends AbstractList and implements the List interface. ArrayList supports dynamic arrays that can grow as needed. Standard Java arrays are of a fixed length. After arrays are created, they cannot grow or shrink, which means that you must know in advance how many elements an array will hold. Array lists are created with an initial size. When this size is exceeded, the collection is automatically enlarged. When objects are removed, the array may be shrunk. 395
Java Following is the list of the constructors provided by the ArrayList class. Sr. No. Constructors and Description 1 ArrayList( ) This constructor builds an empty array list. ArrayList(Collection c) 2 This constructor builds an array list that is initialized with the elements of the collection c. ArrayList(int capacity) 3 This constructor builds an array list that has the specified initial capacity. The capacity is the size of the underlying array that is used to store the elements. The capacity grows automatically as elements are added to an array list. Apart from the methods inherited from its parent classes, ArrayList defines the following methods: Sr. No. Methods with Description void add(int index, Object element) 1 2 Inserts the specified element at the specified position index in this list. Throws IndexOutOfBoundsException if the specified index is out of range (index < 0 || index > size()). boolean add(Object o) Appends the specified element to the end of this list. boolean addAll(Collection c) 3 Appends all of the elements in the specified collection to the end of this list, in the order that they are returned by the specified collection's iterator. Throws NullPointerException, if the specified collection is null. boolean addAll(int index, Collection c) 4 5 Inserts all of the elements in the specified collection into this list, starting at the specified position. Throws NullPointerException if the specified collection is null. void clear() Removes all of the elements from this list. 396
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Java About the Tutorial Java is a h
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Java 5. Java - Basic Datatypes ....
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Java Java - String Buffer delete()
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Java File Class ...................
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Java - Basics
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Java Distributed: Java is designe
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2. Java - Environment Setup Java In
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3. Java - Basic Syntax Java When we
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Java Java Identifiers All Java comp
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Java class const continue default d
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Java Each time a new object is crea
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Java This will produce the followin
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Java Example This example explains
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Java Import Statements In Java if a
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Java Now, compile both the classes
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Java Example: short s = 10000, sho
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Java Prefix 0 is used to indicate o
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Java Protected Access Modifier - Pr
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Java The Abstract Modifier Abstract
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Java Example public class MyRunnabl
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Java Example The following program
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Java A switch statement can have a
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Java The StringBuilder class was in
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Java Parameters Here is the detail
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Java 11 void setLength(int newLengt
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Java Using String's static format()
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Java 15 int hashCode() Returns a ha
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Java 35 boolean startsWith(String p
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Java Java - String compareTo(Object
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Java } } }catch( Exception ex){ } S
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Java System.out.println(Str1.region
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Java Java - String replace() Method
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Java Java - String toString() Metho
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Java valueOf(char[] data, int
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Java The above statement does two t
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Java The foreach Loops JDK 1.5 intr
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Java public static void fill(int[]
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Java 5 int compareTo(Object obj) Op
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Java Simple DateFormat Format Codes
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Java } } // display time and date u
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Java I Two-digit hour (with leading
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Java 5 GregorianCalendar(Locale aLo
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Java void roll(int field, boolean u
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Java re? Matches 0 or 1 occurrence
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Java PatternSyntaxException Class M
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Java this(); } //Assigning the loca
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Java out = new FileOutputStream("ou
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Java Standard Streams All the progr
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Java The two important streams are
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Java FileOutputStream FileOutputStr
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Java 18 public String[] list(Filena
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Java If you try to compile the abov
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Java IllegalMonitorStateException I
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Java Catching Exceptions A method c
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Java Example public class ExcepTest
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Java try(FileReader fr=new FileRead
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Java To demonstrate using our user-
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Java Sorry, but you are short $200.
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Java Inner Classes (Non-static Nest
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Java 297
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Java Inheriting the Abstract Class
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Java You have to place the abstr
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Java public void setAge( int newAge
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Java } } System.out.printf("Seriali
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Java Returns the port of the URL. 5
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34. Java - Multithreading Java Java
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Java void start( ); Example Here is
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Java Step 1 You will need to overri
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Java Thread: Thread-2, 2 Thread: Th
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Java System.out.println("Starting t
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Java Multithreading Example without
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Java Counter --- 3 Counter --- 2 Co
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Java This produces the same result
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Java public T1(Chat m1) { this.m =
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Java @exception Adds a Throws subhe
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Java /** * This is the main method
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