Java程序用随机数填充数组
我们首先创建一个数组-
double[] arr = new double[5];
现在，创建Random类对象-
Random randNum = new Random();
现在，用随机数填充上面的数组-
for (int i = 0; i < 5; i++) {
arr[i] = randNum.nextInt();
}示例
import java.util.Arrays;
import java.util.Random;
public class Demo {
public static void main(String args[]) {
double[] arr = new double[5];
Random randNum = new Random();
for (int i = 0; i < 5; i++) {
arr[i] = randNum.nextInt();
}
System.out.println("Random numbers = "+Arrays.toString(arr));
}
}输出结果
Random numbers = [-6.59888981E8, 1.141160731E9, -9.931249E8, 1.335266582E9, 8.27918412E8]