java代碼調試,打印代碼方法執行時間(毫秒級)

// 放在要檢測的代碼段前，取開始前的時間戳
Long startTime = System.currentTimeMillis();

// 放在要檢測的代碼段前，取結束后的時間戳
Long endTime = System.currentTimeMillis();

// 計算並打印耗時
Long tempTime = (endTime - startTime);
System.out.println("花費時間："+
(((tempTime/86400000)>0)?((tempTime/86400000)+"d"):"")+
((((tempTime/86400000)>0)||((tempTime%86400000/3600000)>0))?((tempTime%86400000/3600000)+"h"):(""))+
((((tempTime/3600000)>0)||((tempTime%3600000/60000)>0))?((tempTime%3600000/60000)+"m"):(""))+
((((tempTime/60000)>0)||((tempTime%60000/1000)>0))?((tempTime%60000/1000)+"s"):(""))+
((tempTime%1000)+"ms"));