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public static void main(String[] args) {
int num=1000000;
List<String> list =new ArrayList<String>();
for (int i = 0; i < num; i++) {
UUID u=UUID.randomUUID();
list.add(u.toString());
}
long t0=System.nanoTime();
list.stream().sorted().count();
long t1=System.nanoTime();
long time=TimeUnit.NANOSECONDS.toMillis(t1 - t0);
System.out.println("用时:"+time);
}
public static void main(String[] args) {
int num=1000000;
List<String> list =new ArrayList<String>();
for (int i = 0; i < num; i++) {
UUID u=UUID.randomUUID();
list.add(u.toString());
}
long t0=System.nanoTime();
list.parallelStream().sorted().count();
long t1=System.nanoTime();
long time=TimeUnit.NANOSECONDS.toMillis(t1 - t0);
System.out.println("用时:"+time);
}