1.产生0-9的随机数字
代码:
import java.util.Random;
import org.junit.Test;
public class RandomNum {
@Test
public void randomCountDemo() {
Random random = new Random();
for (int i = 0; i < 20; i++) {
System.out.print(random.nextInt(10)+",");
}
}
}
运行结果: