import javax.swing.JOptionPane; 
import java.time.LocalDate;
public class test02 {
public static void main(String[] args) {
	int year;
	int month;
	int day;
	int days;
	int confirm = 0;
	while(confirm == 0) {
	String str1 =  JOptionPane.showInputDialog(null, "请输入年", 
			"输入窗口1",JOptionPane.INFORMATION_MESSAGE);
    year = Integer.parseInt(str1);
    String str2 =  JOptionPane.showInputDialog(null, "请输入月", 
			"输入窗口2",JOptionPane.INFORMATION_MESSAGE);
    month = Integer.parseInt(str2);
    String str3 =  JOptionPane.showInputDialog(null, "请输入日", 
			"输入窗口3",JOptionPane.INFORMATION_MESSAGE);
    day = Integer.parseInt(str3);
	LocalDate start = LocalDate.of(year, month, day);
	String str4 =  JOptionPane.showInputDialog(null, "请输入要增加的天数", 
			"输入窗口4",JOptionPane.INFORMATION_MESSAGE);
	days = Integer.parseInt(str4);
	LocalDate end = start.plusDays(days);
	 JOptionPane.showMessageDialog(null, "计算后的日期是" + end);
	 confirm=JOptionPane.showConfirmDialog(null, "还要继续运算吗？","选择窗口",JOptionPane.YES_NO_OPTION); 
	}
	JOptionPane.showMessageDialog(null, "谢谢使用");
	System.exit(0);
}
}