Scanner 클래스 예제

cannerTest1.java

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import java.util.Scanner;   public class ScannerTest1 {  public static void main(String[] args) {   Scanner scanner = new Scanner(System.in);   System.out.print("두 개의 숫자(정수)를 입력해 주세요 : ");   int number1 = scanner.nextInt();   int number2 = scanner.nextInt();   System.out.println("합 : "+(number1+number2));   System.out.print("두 개의 숫자(실수)를 입력해 주세요 : ");   double number3 = scanner.nextDouble();   double number4 = scanner.nextDouble();   System.out.println("합 : "+(number3+number4));   scanner.close();  } }

ScannerTest2.java

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import java.util.Scanner;   public class ScannerTest2 {  public static void main(String[] args) {   Scanner scan = new Scanner(System.in);   String input = "";   do{    System.out.print("값을 입력하세요. 입력을 마치려면 Q를 입력하세요 : ");    input = scan.nextLine();    System.out.println("입력하신 값은 "+input+"입니다.");   }while(!input.equalsIgnoreCase("q"));       System.out.println("프로그램을 종료합니다.");   scan.close();  } }

ScannerTest3.java

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import java.io.File; import java.util.Scanner;   public class ScannerTest3 {  public static void main(String[] args) throws Exception{   Scanner sc1 = new Scanner(new File("score.txt"));   Scanner sc2 = null;   int cnt = 0;   int totalSum =0;       while(sc1.hasNextLine()){    String line=sc1.nextLine();    sc2 = new Scanner(line).useDelimiter(",");    int sum=0;    while(sc2.hasNextInt()){     sum+=sc2.nextInt();    }    System.out.println(line+" sum="+sum);    totalSum+=sum;    cnt++;    sc2.close();   }   System.out.println("Line  : "+cnt+", Total : "+totalSum);   sc1.close();  } }