One Dimensional Array

One Dimensional Array – Using Standard Method

class OnedimensionalStandard

{

public static void main(String args[])

{    

int[] a=new int[3];//declaration  

a[0]=10;//initialization  

a[1]=20;  

a[2]=30;  

//printing array  

System.out.println("One dimensional array elements are");    

System.out.println(a[0]);    

System.out.println(a[1]);    

System.out.println(a[2]);    

}

}

Using Scanner

1. Read the array length as sc.nextInt() and store it in the variable len and declare an array int[len].

2) To store elements in to the array for i=0 to i<length of an array read the element using sc.nextInt() and store the element at the index a[i].

3) Display the elements of an array for loop iterates from i=0 to i<length of an array print the array element a[i].

class OnedimensionalScanner

{

   public static void main(String args[])

   {    

int len;

Scanner sc=new Scanner(System.in);

System.out.println("Enter Array length : ");

len=sc.nextInt();

int a[]=new int[len];//declaration    

System.out.print("Enter " + len + " Element to Store in Array :\n");

        for(int i=0; i<len; i++)

        {

           a[i] = sc.nextInt();

        }  

        System.out.print("Elements in Array are :\n");

        for(int i=0; i<len; i++)

        {

           System.out.print(a[i] + "  ");

        }  

   }

}

Using For Loop – One Dimensional Array

1 2 3 4 5 6 7 8 9 10 11 12

class OnedimensionalLoop { public static void main(String args[]) {        int a[]={10,20,30,40,50};//declaration and initialization         System.out.println("One dimensional array elements are :\n");        for(int i=0;i<a.length;i++)      { System.out.println("a["+i+"]:"+a[i]);        } } }

Using String

1. We declared one-dimensional string array with the elements strings.

2) To print strings from the string array. for i=0 to i<length of the string print string which is at the index str[i].

class OneDimensionString

{

    public static void main(String[] args)

    {

        //declare and initialize one dimension array

        String[] str = new String[]{"one", "two", "three", "four"};

        System.out.println("These are elements of one Dimensional array.");

        for (int i = 0; i < str.length; i++)

{

            System.err.println(str[i] + "   ");

        }

   }

}