Java 中将整数集合转换为整数数组的程序
java 8object oriented programmingprogramming更新于 2025/12/3 23:40:17
假设我们的整数集合为 -
Set<Integer> set = new HashSet<>(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500));
现在，将其转换为整数数组 -
int[] arr = set.stream() .mapToInt(Integer::intValue) .toArray();
示例
以下是 Java 中将整数集合转换为整数数组的程序 −
import java.util.*;
import java.util.stream.*;
import java.util.function.Function;
public class Demo {
public static void main(String args[]) {
Set<Integer> set = new HashSet<>(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500));
System.out.println("Set = " + set);
int[] arr = set.stream().mapToInt(Integer::intValue).toArray();
System.out.println("Array = "+ Arrays.toString(arr));
}
}
输出
Set = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500] Array = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500]
