Java Basic String Manipulation OOPs Concept In Java

        

package All_in_one;

import java.util.Scanner; //for taking input

public class java_basic {
	
	//10.function
	static void myData(){
		System.out.printf("RajoMay Data Loading...");
	}
	static int myData(int a){
		return a*100;
	}
	
	public static void main(String args[]) {
			
		1.print on console	
			System.out.print("Rajomay");
			System.out.println("Rajomay"); //print with next line
		//_____________________________________________________________________________________________________________

		//2.Taking input
			int a;
			Scanner scan = new Scanner(System.in);
			a = scan.nextInt();
			System.out.println("your entered no. : "+a);
		//_____________________________________________________________________________________________________________

		//3.Data Types  (Note-: java does not support long long)
			byte a4;
			short a1;
			int a2; 
			long a3;
		
			float b1;
			double b2;

			char a = 'a';
			String b = "Rajoshree";
			
			boolean a0 = true; //%b
		//_____________________________________________________________________________________________________________
			
		//4.Multiline input
			a4 = scan.nextByte();
			a1 = scan.nextShort();
			a2 = scan.nextInt();
			a3 = scan.nextLong();
			
			b1 = scan.nextFloat();
			b2 = scan.nextDouble();
			
			a = scan.next().charAt(0);
			b = scan.nextLine();
			
			System.out.printf("%d \n",a2);
			System.out.println(a3);
			System.out.println(b1);
			System.out.println(b2);
			System.out.println(a);
			System.out.println(b);
			System.out.printf("%b",a0);	
		//_____________________________________________________________________________________________________________

		//6.if/else
			if(true){
				System.out.print("yes");
			}
			else if(false){
				System.out.print("no");	
			}
			else{
				System.out.print("NA");
			}
		////_____________________________________________________________________________________________________________
		  
		//7.switch case (Note-: java support string case " ")
			switch("rajomay"){
				case 1:
					System.out.printf("num");
					break;
					
				case 'a':
					System.out.printf("char");
					break;
				case "rajomay":
					System.out.printf("String");
					break;
				default:
					System.out.printf("NA");
			}
		//_____________________________________________________________________________________________________________

		//8.for loops
			for(int i=1;i<=10;i++){
				System.out.printf("%d \n",i);
			}
		//_____________________________________________________________________________________________________________

		//9.while and do-while loop
			int i=44;
			while(i<10){
				System.out.printf("%d \n",i);
				i++;
			}
		//---------------------------------------	
			do{
				System.out.printf("%d \n",i);
				i++;	
			}while(i<10);
			
		//_____________________________________________________________________________________________________________

		//10.function
			myData();
			System.out.printf("%d",myData(2));
		//_____________________________________________________________________________________________________________
		//11.Typecasting
			int i = 17;
		   	double d;
		   	char c;
		   	String ac;
		   	
		   	d = (double) i;
		   	c = (char) i;
		   	ac = String.valueOf(i);
		   	 
		    System.out.print( d );
		    System.out.print( c );
		    System.out.print( ac );
		//_____________________________________________________________________________________________________________
			
	}
}