Array length in JAVA | How to Find Array Length in Java

Introduction to Array length in JAVA:

The length of the array describes the number of elements used in Java. As java is not a Size associated, so Array length helps to overcome it.

Here length applies to array in java, and Size applies to a Java ArrayLISTcollection object.

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Java ‘Length’ Attribute:

The number of elements is used in the array during its declaration; we can call it as Size or length of the array. For example;

int len1 = myArray.length1;

The below program illustrate the length attributes of the Array elements in JAVA:

Import java.util.*; // built-in libraryClass Main1
{
   Public static Void main1 (string [] args)
    {
      Integer [] intArray1 = {1, 3, 5, 7, 9}; // integer value
       String [] strArray1 = { “one”, “two”, “three”}; // string array elements
                   //Print each array and their corresponding length
        System.out.printIn (“integer array contents: “+ Array.to string (intArray1));
        System.out.printIn (“the length of the Integer array stored: “+intArray1.length);
       System.out.PrintIn (“string Array contents: “+ Arrays. ToString (strArray1));
       System.out.PrintIn (“The length of the String array: “+ strArray1. Length);
      }
}
 The output:
Integer Array Contents: {1, 3, 5, 7, 9}
The length of the Integer array: 5
String Array Contents: [one, two, three]
The length of the String array: 3
The above java program reads the length of the given elements and displays the length along with the contents of two different arrays (integers and strings).

Till now I have explained the simple program, now it’s time to learn how to use array in different situations.

They are:

· Mainly to search for the specific element value in the array.

· While searching for minimum or maximum values in the array.

Let’s discuss these two different situations in details:

Searching for a value using Length attributes:

As we discussed earlier, iterations can be done through an array using its length attributes. The loop condition in any program will iterate all the array elements one by one until it reaches (length-1) elements. (Since array count in java starts from 0).

Here we are going to use Loop condition to search if a specific value is present in the array or not. To do this, you need to traverse through the whole array until the loop reaches the last element. While performing traversing, each element in the condition will be compared with the existing value to be searched. If any value matches then loop traversing will be stopped as well as program will be terminated.

The below program explains the searching for a data value in an Array:

Import java.util.* ; //built-in libraryClass Main
{
Public static void main (string [] args)
      {
         String[] strArray1 = { “UNIX” , “Python”, “ Ruby”, “ Java”, “C” }; // array of string
 
   // searching for the string using a search value function 
       
System.out.printIn (searchValue (strArray, “R”)?” value R found” : “value Java not found”);
 System.out.printIn (searchValue (strArray, “Ruby”)?” value Ruby found”: “value Ruby not found”);
}
 Private static Boolean search value (String [] search array, string lookup)
   {
    If (searchArray! = null)
          {
          int arraylength = searchArray. Length; // compute array length
             for (int i=0; I 
                {
                    String value = searchArray[i];
                     If (value. Equals (lookup))
                             {
                                 Return true;
                             }
                    }
        }
 Return false;
       }
The Output:
Value R not found
Value Ruby found