String

public static void main(String[] args){

        // create string with the constructor of string class and print the string

        System.out.println("Example of declearing string : \n");

        String str = "I am a constractor string";

        String str1 = new String("I am also a constructor string");

        System.out.println(str + "\n" + str1  +"\n");

        System.out.println("How to find length of a string : \n");

        // how to find length of a constructor

        //using length(); method we can find length of any string

        String str3 = "Can you find my length please ?";

        int len = str3.length();

        System.out.println("The length of 'str3' is "+ len +"\n");

        System.out.println("How to Reverse a string : \n");

        //how to reverse a string

        //we can reverse a string using ' reverse() ' method

        // reverse() is a method of StringBuffer class

        StringBuffer str4 = new StringBuffer("Reverse me");

        System.out.println("Original string is -> "+ str4);

        String str5 = str4.reverse().toString();

        System.out.println("The string after reverse is -> "+ str5 +"\n");

        System.out.println("How to Iterate every element of a string : \n");

        // to iterate any strings element we need " charAt() " method

        String str6 = "Saiful";

        //print string element individually with a new line

        for(int i=0; i<str6.length(); i++){

            System.out.println(str6.charAt(i));

        }

        System.out.println();

        System.out.println("How to remove all whitespace before a string (using trim()) method : \n");

        //we can do it using trim() method

        String str7 = "    Mukta";

        System.out.print("The string before removing whitespace : ->"+ str7 +"\n");

        System.out.println("The string after removing whitespace : ->"+ str7.trim() +"\n");

        System.out.println("How to break a string into tocken :");

        // bye using " StringTokenizer " class we can break a string into tocken

        /* if a string is " My name is mukta " then it will break into 3 word like

            (1) My

            (2) name

            (3) is

            (4) mukta

        */

        //for that we need a string of stringtokenizer class and hasMoreToken() and nextToken() method

        StringTokenizer str8 = new StringTokenizer("My name is mukta");

        while(str8.hasMoreTokens()){

            System.out.println(str8.nextToken());

        }

        System.out.println();

    }