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ArraysDemo.java
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package javaPrograms8PM;
public class ArraysDemo {
public static void main(String[] args) {
// TODO Auto-generated method stub
// loops are fetching data from excel sheet,
//cell value for each row and col
// once the values are fetched they have to be stored
// variables is storing temp data
// String username="us1", ps1, password123, [email protected];
// A variable cannot be used to store mulitple set of data
// Arrays --- Are Object in Java which is used to store multiple values
// how to declare an array
// Name of array and datatype of it, length of the array, data to be stored
// create an array storing integer values
// Method 1 : to write an Array in Java
// Declaring an Array
int Arr[];
// length of array as 4
//new = if we want to allocate some memory sapce for that object we will use new keyword
Arr= new int[4];
// store values in the array
Arr[0]=10;
Arr[1]=20;
Arr[2]=30;
Arr[3]=40;
//Arr[4]=50;
System.out.println(Arr[0]); // print the value stored at location Arr[0]
// Method2 to write an Array
// write an Array to store 4 String values
//datatype[] name of array = new datatype[length]
String [] arr1= new String[4];
arr1[0]="Selenium";
arr1[1]="training";
arr1[2]="8PM";
arr1[3]="H2k";
System.out.println(arr1[0]);
System.out.println(arr1[1]);
System.out.println(arr1[2]);
System.out.println(arr1[3]);
// Method3 to write an array
int [] arr2= {1,2,3,4,5,6,7,8};
String [] arr3= {"A","B","C","D"};
// datatype [] nameof arry= {"values to be stored"};
// print the values
System.out.println(arr3[2]); // C
// How can we print all the values
for(int i=0; i<4;i++)
{
System.out.println(arr3[i]);
}
// Multi deminsional array : Array storing multiple sets of values
int [][] arr4= {{1,2,3,4},{4,6,7,8},{43543,435456,456456}};
String[] [] arr5= {{"sonal","mittal"},{"1","2","3"}};
// Assignment - To print a multi dimensional array
// length() is an exisitng method in Java
// it is used to find the length of an array
int x=arr4.length;
for(int i=0; i<arr5.length;i++) // to go to index of parent arry
{
System.out.println("printing multi dimensional array");
for(int j=0; j<arr5[i].length;j++)
{
System.out.println(arr5[i][j]);
}
}
}
}