find length of the string in java

To find length of the string we use length() method

length():- length() is final method, it is applicable for String Objects. Length() method returns number of characters present in the String.

import java.util.Scanner;

public class PalindromeTest {

    public static void main(String[] arg){

        Scanner sc=new Scanner(System.in);

        System.out.println("Enter Name :");

        String name=sc.nextLine();

        System.out.println("length of the String : "+name.length());  

                               /*

                               length() is final method, it is useful to find the length of the string

                               */

    }

}

/*

Enter Name :

java

length of the String : 4

*/

length vs length() in java

length:- length is final variable, it is applicable for arrays and it returns the size of an array

Example:

int[ ] a={10,20,30};

System.out.print(a.length);

Here the above array size is 3.

In this case if we give length() instead of a.length then we will get compile time error.

length():- length() is final method, it is applicable for String Objects. Length() method returns number of characters present in the String.

Example:

String s="java";

System.out.print(s.length());

Here the above String length is 4(j,a,v,a)

Example:

String[ ] s={"java","html5","css"};

System.out.println(s.length);//3

System.out.println(s.length());//error

System.out.println(s[0].length());//4

System.out.println(s[0].length);//error

In the above example

‘s’ is an array and s[0] is String

s.length and s[0].length() are true 

Note: In multi dimensional arrays length variable represents only base size but not total size of an array.

int[ ] a=new int[2][3];

System.out.println(a.length);//2

System.out.println(a[0].length);//3

If we want find total size of multi dimensional array

System.out.println(a[0].length+a[1].length);//3+3=6