public?class?SortingTimeTest?{
public?static?void?main(String[]?args)?{
//?TODO?自動生成的方法存根
Stopwatch?time?=?new?Stopwatch();
int[]?arrays?=?new?int[100000];
long?time1;
long?time2;
for?(int?i?=?0;i?<?arrays.length;i++){
arrays[i]?=?(int)(Math.random()?*?100000);
}
time1?=?time.start();
System.out.println(time1);
java.util.Arrays.parallelSort(arrays);
time2?=?time.stop();
????System.out.println(?time2);
}
?class?Stopwatch?{
private?long?startTime?;
private?long?endTime?;
java.util.Date?date?=?new?java.util.Date();
public?Stopwatch(){
startTime?=?0;
}
public??long?start(){
startTime?=?date.getTime();
return?startTime;
}
public?long?stop(){
endTime?=?date.getTime();
return?endTime;
}
public?long?getElapsedTime(){
return?endTime?-?startTime;
}
}
}
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