1 package algorithm;
2 //转载请注明
3 public class FilterPrime {
4 public static void filterPrime(int n) {
5 boolean[] isPrimes = new boolean[n+1];
6 for(int i=2;i<=n;i++){
7 isPrimes[i]=true;
8 }
9 isPrimes[2]=true;
10 for(int j=2;j<=n;j++){
11 if(isPrimes[j]==true){
12 for(int m=2;j*m<=n;m++){
13 isPrimes[j*m]=false;
14 }
15 }
16 }
17 for(int k=2;k<=n;k++){
18 if(isPrimes[k]==true){
19 System.out.println(k+"是素数");
20 }
21 }
22 }
23
24 public static void main(String[] args) {
25 filterPrime(23);
26 }
27 }
When things go wrong,don't go with them.