java 문법 - 2 Math, 문자열 숫자 상호 변환, Random, 키보드 입력

import java.util.Random;
import java.util.Scanner;

public class Main1 {
	
	public static void main(String[] args) {

		System.out.println(Math.max(10, 30));
		System.out.println(Math.min(10, 30));
		System.out.println(Math.abs(-30));
		
		
		String str = "100"; 
		
		int i = Integer.parseInt(str);	
		System.out.println(i);
		
		
		long l = Long.parseLong(str);	
		System.out.println(l);
		
		String str2 = String.valueOf(i);
		System.out.println(str2);
		
		Random random = new Random(); 
		int rand = random.nextInt(10);  // 0~9 
	
		
		// 5~9까지 하고 싶을 때  => 		0~4 에서 + 5 = 5~9 
		
		int rand1 = random.nextInt(5) + 5;
		
		System.out.println(rand);
		System.out.println(rand1);
		
		
		// 키보드 입력 
		Scanner scanner = new Scanner(System.in);
		
		String str3 = scanner.next();
		int k = scanner.nextInt();
		long j = scanner.nextLong();
		

		
		
	}

}