编写Java程序，创建数组a和b，将数组a中索引位置0~3的元素复制到数组b中，最后将a和b数组中元素输出。求解

Posted 2023-03-13

String[] a = "a","b","c","d","e";
String[] b = "1","2","3","4","5";
System.arraycopy(a, 0, b, 0,3);
for (int i = 0; i < a.length; i++)
System.out.print(a[i]);

System.out.println();
for (int i = 0; i < b.length; i++)
System.out.print(b[i]);

参考技术A import java.util.Arrays;

public class Test
public static void main(String[] args)

int[] a= 35, 22, 18, 36;
int[] b = 1, 3, 5, 122;

System.out.println("Before copied, array a: " + Arrays.toString(a));
System.out.println("Before copied, array b: " + Arrays.toString(b));

b[0] = a[0];
b[1] = a[1];
b[2] = a[2];
b[3] = a[3];

System.out.println("After copied, array a: " + Arrays.toString(a));
System.out.println("After copied, array b: " + Arrays.toString(b));

参考技术B B数组是空的？如果不是，楼上正解