Java Scanner에 대한 이해

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
  		 * scanner.nextLine()
  		 *  - 한 줄 전체를 입력 받음
  		 */
  	
  		Scanner scanner = new Scanner(System.in);
  	
  		System.out.print("문자열 입력 : ");
  		String str1 = scanner.nextLine();
  		System.out.println(str1);
  	
  		System.out.print("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("--회원가입 절차를 시작합니다--");
  	
  		Scanner scanner = new Scanner(System.in);
  	
  		System.out.print("아이디를 입력하세요 : ");
  		String str1 = scanner.nextLine();
  		System.out.println(str1);
  	
  		if(str1.length()>11) {
  			System.out.println("아이디는 10자리 " + "이하로의 글자로만 입력해주세요");
  		} else {
  			System.out.println("입력하신 아이디 " + str1 + " 입니다. 회원가입 시작");
  		}
  	
  	
  	
  	}
  
  	}