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Arrays in Java (Part 3)

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Arrays in Java: (Part 3)

One Dimensional Array (Accepting array and printing programs):

  • Example: (Print static array (int) in Java)
    // Print a Static array in Java
    import java.util.Scanner;
    class test {
    public static void main(String ar[]) {
    int a[]={10,13,15,16,18}; // declare and initialize
    // length -> counts the number of values stored in array a
    for(int i=0 ; i<a.length ; i++)
    {
    System.out.println(i + " "+ a[i]);
    }
    }
    }
    /* OUTPUT
    0 10
    1 13
    2 15
    3 16
    4 18 */
    view raw pattern.java hosted with ❤ by GitHub
  • Example: (Print Dynamic array (int) in Java)
    // Print a Dynamic array in Java
    import java.util.Scanner;
    class test {
    public static void main(String ar[])
    {
    Scanner scan = new Scanner(System.in);
    //take array size input from user
    System.out.println("Enter size of array:");
    int size = scan.nextInt();
    //take elements input from user
    int array[] = new int[size];
    for(int i=0 ; i<array.length ; i++) // can also use size instead of length
    {
    System.out.println("Enter "+i+" element:"); // informing user to print which element
    array[i] = scan.nextInt(); //user enters element which is stored in array, at location i
    }
    // same loop to print the elements
    for(int i=0 ; i<array.length ; i++) // can also use size instead of length
    {
    System.out.println(i+" "+array[i]);
    }
    }
    }
    view raw pattern.java hosted with ❤ by GitHub
  • Example: (Print static array (String) in Java)
    // Print a static (String) array in Java
    import java.util.Scanner;
    class test
    {
    public static void main(String ar[])
    {
    String array[] = {"Hello","to","the","World","Of","Java"};// declare and initialize
    // length -> counts the number of values stored in array a
    for(int i=0 ; i<array.length ; i++)
    {
    System.out.println(i + " "+ array[i]);
    }
    }
    }
    /* OUTPUT
    0 Hello
    1 to
    2 the
    3 World
    4 Of
    5 Java
    */
    view raw pattern.java hosted with ❤ by GitHub
  • Example: (Print dynamic array (String) in Java)
    // Print a Dynamic array in Java
    import java.util.Scanner;
    class test
    {
    public static void main(String ar[])
    {
    Scanner scan = new Scanner(System.in);
    //take array size input from user
    System.out.println("Enter size of array:");
    int size = scan.nextInt();
    scan.nextLine(); // clear the buffer after integer input.
    //take elements input from user
    String array[] = new String[size];
    for(int i=0 ; i<array.length ; i++) // can also use size instead of length
    {
    System.out.println("Enter "+i+" element:"); // informing user to print which element
    array[i] = scan.nextLine(); //user enters sentences which are stored in array, at location i
    }
    // same loop to print the elements
    for(int i=0 ; i<array.length ; i++) // can also use size instead of length
    {
    System.out.println(i+" "+array[i]);
    }
    }
    }
    /* OUTPUT
    Enter size of array:
    3
    Enter 0 element:
    this is first
    Enter 1 element:
    this is second
    Enter 2 element:
    this is third
    0 this is first
    1 this is second
    2 this is third
    */
    view raw test.java hosted with ❤ by GitHub

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