chapter4n1c.java

JAVA源代码程序aashjkjhkjhkjhjkhkj

/*
 * program to demonstrate a simple "switch" statement
 */

import java.lancs.* ;

public class Chapter4n1c
    {
    // constants for the names of the month
    public static final int JAN = 1 ;
    public static final int FEB = 2 ;
    public static final int MAR = 3 ;
    public static final int APR = 4 ;
    public static final int MAY = 5 ;
    public static final int JUN = 6 ;
    public static final int JUL = 7 ;
    public static final int AUG = 8 ;
    public static final int SEP = 9 ;
    public static final int OCT = 10 ;
    public static final int NOV = 11 ;
    public static final int DEC = 12 ;

    /*
     * main
     */

    public static void main(String[] args) throws Exception
	{
	// read in value for the month
	BasicIo.prompt("please type in a month (1 to 12) ") ;
        int month = BasicIo.readInteger() ;

        // output some information about the month
        int days = 0 ;
        switch (month)
            {
            case SEP : case APR : case JUN : case NOV :
		days = 30 ;
		break ;
	    case FEB : // assume not a leap year, for the present
		days = 28 ;
		break ;
	    case JAN : case MAR : case MAY : case JUL :
	    case AUG : case OCT : case DEC :
		days = 31 ;
		break ;
	    default :
		System.out.print("illegal month!") ;
            } ;
	System.out.println("Month " + month + " has " + days + " days") ;
	} // end of method main
    } // end of class Chapter4n1c