자바 변수

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		System.out.println("Hello World!");
		
	}
}

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		int intType = 100;
		double doubleType = 150.5;
		String stringType = "콩나물대제국";
				
		System.out.println(intType);
		System.out.println(doubleType);
		System.out.println(stringType);
	}
}

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		double b=0.4;
		int a = (int) (b+0.5);
		System.out.println(a);
	}
}

public class MAin {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		int a = 1;
		int b = 2;
		
		System.out.println("a + b = " + (a + b));
		System.out.println("a - b = " + (a - b));
		
	}
}

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		int a = 200;
		
		System.out.println("10진수 : " + a);
		System.out.format("8 진수 : %on", a);
		System.out.format("16 진수 : %x", a);
		
	}
}

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String name = "John Doe";
		System.out.println(name);
		System.out.println(name.substring(0,4));
		System.out.println(name.substring(3,6));
		System.out.println(name.substring(5,6));
		
	}
}

public class MAin {
	
	final static int SECOND = 1000;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		int minute = SECOND/ 60;
		int second = SECOND%60;
		
		System.out.println(minute + "분 " + second + "초");
		
	}
}

public class MAin {
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		String a = "I Dove You!";
		if (a.contains("Love")) {
			// 포함하는 경우 실행되는 부분
			System.out.println("Me too!");
		} else {
			// 포함하지 않는 경우 실행되븐 부분
			System.out.println("I hate you!");
		}
	}
}

public class MAin {
	
	final static int SECOND = 1000;
	
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		int a = 10;
		System.out.println("현재의 a는 " + a + "입니다.");
		a++;
		System.out.println("현재의 a는 " + a + "입니다.");
		System.out.println("현재의 a는 " + ++a + "입니다.");
		System.out.println("현재의 a는 " + a++ + "입니다.");
                System.out.println("현재의 a는 " + a + "입니다.");
		
	}
}