廢話不多說(shuō)永乌，上代碼
import java.util.ArrayList;
import java.util.List;
public class BinarySearch {
public static Integer binarySearch(List<Integer> list,Integer num){
Integer low = 0;
Integer high = list.size()-1;
Integer counter = 0;
while(low <= high){
Integer mid = (low + high)/2;
Integer guess = list.get(mid);
if(guess == num){
return guess;
}else if(guess >= num){
high = mid - 1;
}else{
low = mid + 1;
}
System.out.println("low:"+low);
System.out.println("high:"+high);
++counter;
}
return counter;
}
public static void main(String[] args) {
List<Integer> list = new ArrayList<>();
for(int x=1; x<1000000; x++){
list.add(x);
}
System.out.println(BinarySearch.binarySearch(list, 356));
}
}
