JavaPractice

// Java의 정석 예제


// 2-4
package playGround;

public class testJava {

	public static void main(String[] args) {
		byte b = 1;
		short s = 2;
		char c = 'A';
		
		int finger = 10;
		long big = 100_000_000_00L; // long big = 10000000000L
		long hex = 0xFFFF_FFFF_FFFF_FFFFL;
		
		int octNum = 010;
		int hexNum = 0x10;
		int binNum = 0b10;
		
		System.out.printf("b = %d%n",  b);
		System.out.printf("s = %d%n",  s);
		System.out.printf("c = %s%n", c);
		
		System.out.printf("finger = [%5d]%n", finger*100);
		System.out.printf("finger = [%-5d]%n", finger);
		System.out.printf("finger = [%05d]%n", finger);
		
		System.out.printf("big = %d%n", big);
		System.out.printf("hex = %x%n", hex);
		
		System.out.printf("octNum = %o, %d%n", octNum, octNum);
		System.out.printf("hexNum = %x, %d%n", hexNum, hexNum);
		System.out.printf("binNum = %s, %d%n", binNum, binNum);
	}
	


}


// 2-5
package playGround;
import java.util.*;

public class testJava {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		System.out.print("두 자리 정수를 하나 입력해주세요.");
		int num = Integer.parseInt(scanner.nextLine());
		
		System.out.println("입력내용 : "+num);
		System.out.printf("num=%d%n",  num);
	}
		

}


// 4-1
package playGround;
import java.util.*;

public class testJava{
	public static void main(String[] args) {
		Scanner temp = new Scanner(System.in);
		System.out.printf("Enter Interger");
		
		int x = temp.nextInt();
		
		if(x >= 50) {
			System.out.printf("Hi, its over 50 : %d", x);
		}
		else if(x >= 20) {
			System.out.printf("Its between 20 to 50 right? : %d", x);
		}
		else {
			System.out.printf("No, It is under 20 %d", x);
		}
	}
}

// 4-2
package playGround;
import java.util.*;


public class testJava{
	public static void main(String[] args) {
		int cnt = 0;
		
		while(true) {
			System.out.println("wow");
			cnt += 1;
			
			if (cnt > 100) {
				break;
			}
			else {
				continue;
			}
		}
	}
}