Scanner

package scanner;

import java.util.Scanner;

public class Main01 {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		
		System.out.print("int type 입력 : ");
		int i = scanner.nextInt();
		System.out.println("int 결과 : "+i);
		
		System.out.print("double type 입력 : " );
		double d = scanner.nextDouble();
		System.out.println("double 결과 : " + d);
		
		System.out.print("String 입력 : " );
		String s = scanner.next();
		System.out.println("String 결과 : " + s);
		
		scanner.close();
	}

}

package scanner;

import java.util.Scanner;

public class Main02 {

	public static void main(String[] args) {
		// scanner.next() : 공백 전까지 입력 받음
		// scanner.nextLine() : 한 줄 전체를 입력 받음 

		Scanner scanner = new Scanner(System.in);
		
		System.out.println("문자열 입력 : ");
		String str1 = scanner.nextLine();
		System.out.println(str1);
		
		System.out.println("문자열 입력 : ");
		String str2 = scanner.next();
		System.out.println(str2);
		
		scanner.close();
	}

}

package scanner;

import java.util.Scanner;

public class Main03 {

	public static void main(String[] args) {
		System.out.println("--- 회원가입을 시작합니다 ---");
		
		Scanner scanner = new Scanner(System.in);
		
		System.out.println("아이디를 입력하세요 : ");
		String str1 = scanner.nextLine();
		System.out.println(str1);
		
		if(str1.length() > 11) {
			System.out.println("아이디는 10글자 이하의 글자로만 입력해주세요");
		} else {
			System.out.println("입력하신 아이디 "+str1+ "으로 회원가입 시작합니다.");
		}
		
		scanner.close();
	}

}