switch文はbreakを省略すべきではない.文!

public class SwitchDefaultTest {
    public static void main(String[] args) {
        char score = 'C';
        switch (score) {
            case 'A':
                System.out.println("  ");
                // break;
            case 'B':
                System.out.println("  ");
                // break;
            case 'C':
                System.out.println(" ");
                // break;
            case 'D':
                System.out.println("  ");
                // break;
            case 'E':
                System.out.println("   ");
                // break;
            default:
                System.out.println("      ");
                // break;
        }
    }
}

javac -encoding utf-8 -Xlint:fallthrough SwitchDefaultTest

    ：