formatedateoutput.java

编程之道--java程序设计入门源代码

/*
*日历按照格式输出
*/
import java.util.Calendar;
import javax.swing.JOptionPane;
import java.text.SimpleDateFormat;

public class FormateDateOutput
{
	private int year;
	public static void main(String[] args)
	{
		String input = JOptionPane.showInputDialog("请输入有效的年份(YYYY)：");
		int year1 = Integer.parseInt(input);//将字符串转化为整数
		
		FormateDateOutput out = new FormateDateOutput();
		out.setYear(year1);

		if(year1 != 0 && input.length() == 4)
		{
			out.FormateDateStr();
		}
		else
		{
			System.out.println("输入的年份无效。");
		}

		System.exit(0);
	}
	
	public void FormateDateStr()
	{
		SimpleDateFormat formatter = (SimpleDateFormat)SimpleDateFormat.getDateInstance();
		formatter.applyPattern("yyyy-MM-dd");
		Calendar  cal = Calendar.getInstance();
		
    for(int i = 0; i <12; i++ )
		{
      cal.set(year, i,1);
      int temp = cal.getActualMaximum(Calendar.DAY_OF_MONTH);

      for (int j = 1; j <= temp; j++)
			{
        cal.set(year, i, j);
        String str = formatter.format(cal.getTime());
        System.out.println("当前的时间是：" + str);
     	}
    }
	}

	public void setYear(int year)
	{
		this.year = year;
		System.out.println("the year is " + this.year);
	}
	
	public int getYear()
	{
		return year;
	}
}