difference between String|array length and|vs length() function|method in java with example

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 length variable Vs length():

          length:              

                      length variable is used for finding the size of an array.

                     It   is used for finding size of array. Consider an array a[] of String

        

         For Example:

                String a[]={“1”,”2”,”3”}

                System.out.println(a.length); //  a.length it returns size of array “a” as 3

               length():         

                       Length() is used for finding the size of String and size of file.

      For Example:

                String s2[]={ “Servlets”,”JavaJavax”,”Javax”,”Java”};

                System.out.println(s2[1]);//size of string as it returns 7

      For Example:

          // Demo.java

         public  class Demo {

         public static void main(String args[]){

         String s1[]={ “java”,”JavaJavax”,”Javax”};

         String s2[]={ “Servlets”,”JavaJavax”,”Javax”,”Java”};

         System.out.println(s1.length+”is length of s1 “); // s1.length is valid but s1[2].length is 

                                                                                 //invalid

         System.out.println(s2[2].length()+”is length of s2 “); //s2[2].length() is valid but  

                                                                                                //s2.length() is invalid

            }

        }