用java写100以内的质数
时间: 2023-09-20 11:12:46 浏览: 39
以下是用 Java 实现的求解 100 以内质数的代码:
```java
public class PrimeNumbers {
public static void main(String[] args) {
int n = 100;
System.out.print("2 ");
for (int i = 3; i <= n; i += 2) {
if (isPrime(i)) {
System.out.print(i + " ");
}
}
}
private static boolean isPrime(int num) {
if (num == 2 || num == 3) {
return true;
}
if (num == 1 || num % 2 == 0) {
return false;
}
for (int i = 3; i <= Math.sqrt(num); i += 2) {
if (num % i == 0) {
return false;
}
}
return true;
}
}
```
运行结果:
```
2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97
```