Java程序从给定数组生成随机元素
假设以下是我们的数组-
Integer[] arr = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20};现在，我们可以在将其改组之前将其转换为列表-
List<Integer>list = Arrays.asList(arr); Collections.shuffle(list);
上述改组生成随机元素。这样显示它们-
for (Integer res: list) {
System.out.print(res + " ");
}示例
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class Demo {
public static void main(String[] args) {
Integer[] arr = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20};
System.out.print("Array elements...\n");
for (Integer res: arr) {
System.out.print(res + " ");
}
List<Integer>list = Arrays.asList(arr);
Collections.shuffle(list);
System.out.println("\n\nRandom elements...");
for (Integer res: list) {
System.out.print(res + " ");
}
}
}输出结果
Array elements... 2 4 6 8 10 12 14 16 18 20 Random elements... 18 16 4 20 12 14 10 2 6 8