thenumberofdaysineachmonth.java

是<java程序设计>的课后作业2-8源码.可以供初学者参考,作了解java基础语法所用.

/**
 * @(#)TheNumberOfDaysInEachMonth.java
 *
 *
 * @author 
 * @version 1.00 2009/3/3
 */
//输出指定月的天数

import javax.swing.JOptionPane;

public class TheNumberOfDaysInEachMonth {
        
    /**
     * Creates a new instance of <code>TheNumberOfDaysInEachMonth</code>.
     */
    public TheNumberOfDaysInEachMonth() {
    }
    
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        
        //Input year
        String stringYear=JOptionPane.showInputDialog(null,"Please input a year,for example, 2009",
        "Exercise3.5 Input",JOptionPane.QUESTION_MESSAGE);
        //Convert striing into int
        int intYear=Integer.parseInt(stringYear);
        
        //input month
        String stringMonth=JOptionPane.showInputDialog(null,"Please input a month,for example, 8",
        "Exercise3.5 Input",JOptionPane.QUESTION_MESSAGE);
        //Convert string into int
        int intMonth=Integer.parseInt(stringMonth);
        
        switch(intMonth)
        {
        	case (1):case (3):
        	case (5):case (7):
        	case (8):case (10):case (12):
        		JOptionPane.showMessageDialog(null,"There are 31 days in "+intYear+"/"+intMonth+"\n",
        		"Exercise3.5 Output",JOptionPane.INFORMATION_MESSAGE );
        		break;
        	case (4):case (6):
        	case (9):case (11):
        		JOptionPane.showMessageDialog(null,"There are 30 days in "+intYear+"/"+intMonth+"\n",
        		"Exercise3.5 Output",JOptionPane.INFORMATION_MESSAGE);
        		break;
        	case (2):JOptionPane.showMessageDialog(null,"There are "+((((intYear%4==0)&&(intYear%100!=0))||(intYear%400==0))?29:28)+" days in "
        			+intYear+"/"+intMonth+"\n","Exercise3.5 Output",JOptionPane.INFORMATION_MESSAGE);
        		break;
        	default:JOptionPane.showMessageDialog(null,"Your input is some wrong.",
        	"Exercise3.5 Output",JOptionPane.INFORMATION_MESSAGE);
         }
         
         return ;
        
    }
}