Java基础编程小练习——日期天数的计算

根据网络视频资源做的一些简单Java小编程

4.求1900年1月1日---2015年相隔多少天（相当于到2015年12月30日）（思路: 瑞年366  平年365）

public class rili {

                   publicstatic void main(String[] args){

                                     intsum=0;

                                     for(intyear=1900;year<=2015;year++){

                                               if(year%4==0&& year%100!=0 || year%400==0){

                                                        sum+=366;

                                               }else{

                                                        sum+=365;

                                               }

                                     }

                                     System.out.println("1900年1月1日---2015年相隔"+sum+"天");

                   }

}

 

5.求1900年1月1日-----2016年5月7日有多少天（思路：1 瑞年366 平年365   2 判断月份）

public class rili {

                   publicstatic void main(String[] args){

                                     intsum=0;

                                     for(intyear=1900;year<=2015;year++){

                                               if(year%4==0&& year%100!=0 || year%400==0){

                                                        sum+=366;

                                               }else{

                                                        sum+=365;

                                               }

                                     }

                                     System.out.println("1900年1月1日---2015年相隔"+sum+"天");

                                     for(intmonth=1;month<=4;month++){

                                               if(month==2){

                                                                 if(2016%4==0&& 2016%100!=0 || 2016%400==0){

                                                                           sum+=29;

                                                                 }else{

                                                                           sum+=28;

                                                                 }                                                      

                                               }else{

                                                        if(month==4||month==6||month==9||month==11){

                                                                 sum+=30;

                                                        }else{

                                                                 sum+=31;

                                                        }

                                               }

                                     }

                                     sum+=7;

                                     System.out.println("1900年1月1日---2015年5月7日相隔"+sum+"天");

                   }

}

运行结果：  1900年1月1日---2015年相隔42368天

                  1900年1月1日---2015年5月7日相隔42496天