/*
package com.company;

public class revision01 {
    public static void main(String[] args) {
        System.out.println("Hello World..!!");
    }
}
 */


/*
// pgm to understand util package..
package com.company;
import java.util.*;
class revsion01 {
    public static void main(String[] args) {

        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int sum = a+b;
        System.out.println("Sum of a & b is :- "+ sum);
    }
}
 */

/*
//Pgm to wish Radhey Radhey..
package com.company;
import java.util.*;
class revsion01 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a=sc.nextLine();
        System.out.println("Radhey Radhey "+a+"..!!");


    }
}
*/

/*
//Modoulus ka concept and RHS me Float likhna is important..
package com.company;
import java.util.*;
class revsion01 {
    public static void main(String[] args) {
int a = 47;
int b=22;
float c = a/b;
float c1 = (float) a/b;
float d = a%b;
int e = (int)a%b;
        System.out.println(c);
        System.out.println(c1);
        System.out.println(d);
        System.out.println(e);

    }
}
*/

/*
//pgm to print Ronak in hindi
package com.company;

public class revision01 {
    public static void main(String[] args) {


    }
}
 */

/*
//Math.sqrt pgm
package com.company;
import java.util.*;
class revsion01 {
    public static void main(String[] args) {
        System.out.println("Enter 3 side of triangle..");
        Scanner sc = new Scanner(System.in);
        int s1 = sc.nextInt();
        int s2 = sc.nextInt();
        int s3 = sc.nextInt();
        float s = (float)1/2*(s1+s2+s3);
        double ar;
        ar = Math.sqrt(s*(s-s1)*(s-s2)*(s-s3));

        System.out.println("Area is "+ar);
    }
}
 */

/*
//quadratic equations...
package com.company;
import java.util.*;
import java.lang.Math;

public class revision01 {
    public static void main(String[] args) {


        float a,b,c;
        double r1,r2;
        Scanner sc = new Scanner(System.in);
        System.out.println("Enter a , b , c");
        a=sc.nextFloat();
        b=sc.nextFloat();
        c=sc.nextFloat();
        System.out.println("Your Qud. Eq. is "+a+"x^2 + "+b+"x + "+c);
        System.out.println("Root are...");
        r1=(-b+Math.sqrt(b*b-4*a*c))/(2*a);
        r2=(-b-Math.sqrt(b*b-4*a*c))/(2*a);
        System.out.println(r1);
        System.out.println(r2);

    }
}
*/
/*
//Icreament Decreament
package com.company;

public class revision01 {
    public static void main(String[] args) {

        int a=2,b=5,x=4,c,d;
        c=a*++x +b; //15
       // d= a*x++ +b; //13
        System.out.println(c);
     //   System.out.println(d);
    }
}
*/

//String chpter pura..
package com.company;

public class revision01 {
    public static void main(String[] args) {
        System.out.println("Hello We Are Studying String..!!");

        // Print wali backchodi..
        int x = 10,y =20;
        System.out.println(x+y+"Sum"); //30Sum
        System.out.println("Sum "+x+y); //sum 1020
        System.out.println("Sum "+ (x+y)); // sum 30

        float z =1.2f;
        char c = 'A';
        System.out.printf("The value of %d %f %c is \n",x,z,c); //See printf from

        //Flag
        int x1 =-5;
        System.out.printf("%5d\n",x);
        System.out.printf("%05d\n",x);
        System.out.printf("%(5d\n",x);
        System.out.printf("%+5d\n",x1);
        float a=14.564f;
        System.out.printf("%6.2f\n",a);  //    14.56
        System.out.printf("%1.2f\n",a); //14.56 aage k no. per limits nahi laga sakte..
      
       // heap pool wala concept ye hai ki referenceses aalag hote hai..


        //Methords deklo guyzz..
        String str = " Java " ;
        String str1 = str.toLowerCase();
        System.out.println(str1);
        String str2 = str.toUpperCase();
        System.out.println(str2);
        String str3 =str.trim();
        System.out.println(str3);
        String str4 = str.substring(1,3);
        System.out.println(str4);
        String str5 =str.replace('a','k');
        System.out.println(str5);
        String str6 ="www.ronak.com";
        System.out.println(str6.startsWith("w"));
        // baki k orr hai..

        //abhi k lia Questions ker lete hai..
        //find the email is on email or not..!!
        String strg = "ronak@gmail.comn";
        int i = strg.indexOf("@");
        String uname = strg.substring(0,i);
        System.out.println(uname);
        int j = strg.length();
       //String domain = str.substring(i+1, 16);
        // System.out.println(domain);
        // user name or domain bata dia to
        // check weather its on gmail or not
      //   System.out.println(domain.startsWith("gmail"));

        // check no. is binary or not..
        int b =0110100;
        int b1 =014000;
        String s1 = b+"";
        String s2 = b+"";
        System.out.println(s1.matches("[01]+"));
        System.out.println(s2.matches("[01]*"));
        String s3 ="C12545A";
        String s4 ="Z45451A";
        System.out.println(s3.matches("[0-9][A-F]+"));
        System.out.println(s4.matches("[0-9][A-F]+"));
        String d = "01/02/2001";
        //System.out.println(d.matches("[0-9][0-9/[0-9][0-9]/[0-9]{4}"));


        // Remove speacial character
        //remove extra space
        //find no. of words in the String..



        


    }
}