如何檢查兩個時間範圍是否重疊？

Question

我有一個要求，我可以每天創建3班。換班時間如下：

06:00 - 14:00 
14:01 - 22:00 
22:01 - 05:59. 

如何檢查換檔時間不重疊？請注意，在第三種情況下，從小時大於到小時。

Answer 1

最後我已經解決了我自己的問題。如下請見。

public void checkIfTimesOverlapped(){ 


// eft - existed FROM TIME 
// ett - existed TO TIME 
// cft - current entered FROM TIME 
// ctt - current entered TO TIME 
// Note : same FROM TIME and TO TIME is not allowed. so not checking. 

float eft = 22.00f; 
float ett = 05.00f; 
float cft = 23.00f; 
float ctt = 24.00f; 


    if (cft < ctt) { 
     if (eft < ett) { 
      if(cft<=ett && ctt>=eft){ 
       System.out.println("overlapped"); 
      } 

     } else if(eft > ett) { 
      if(!(cft>ett && ctt<eft)){ 
       System.out.println("overlapped"); 
      } 
     } 
    } else if (cft > ctt) { 

     if (eft < ett) { 
      if((cft>=eft && cft<=ett) || (ctt>=eft && ctt<=ett)){ 
       System.out.println("overlapped"); 
      } 

     } else if(eft > ett) { 
      // already one shift existed with FROM TIME > TO TIME. so again FROM TIME > TO TIME is not possible 
      System.out.println("overlapped"); 
     } 

    } 

}