我如何找出为什么这会不断给我带来错误?
如果有人可以,有人可以给我建议如何缩短代码并使其更高效吗?这是我的计算机科学II APA课程。
import java.util.*;
class arrays15
{
/* write a method that will find the largest values
* between two ints.
*/
public static int large(int num1, int num2) {
return Math.max(num1, num2);
}
任务:
/* fun will take two int arrays and for each position
* it will compare the two values from each array and put the
* larger of the two in a new array. If there are not two values
* to compare then take then assume the other value is a zero (0).
*
* Must call another method to find largest.
*/
public static int[] fun(int[] nums1, int[] nums2) {
ArrayList<Integer> a = new ArrayList<Integer>();
ArrayList<Integer> b = new ArrayList<Integer>();
for(int g = 0; g < nums1.length; g++) {
a.add(nums1[g]);
}
for(int h = 0; h < nums2.length; h++) {
b.add(nums1[h]);
}
for(int i = a.size(); i < b.size(); i++) {
a.add(0);
}
for(int i = b.size(); i < a.size(); i++) {
b.add(0);
}
int[] r = new int[a.size()];
for(int j = 0; j < r.length; j++) {
r[j] = large(a.remove(0), b.remove(0));
}
return r;
}
测试
public static void main(String[] args) {
int[] one = new int[]{1, 2, 3, 4, 5, 6};
int[] two = new int[]{-1, 3, -4, 8, -5, 6, 7};
System.out.println(Arrays.toString(one) + " << >> " + Arrays.toString(two));
System.out.println("maximusArray: " + Arrays.toString(fun(one,two))); // [1, 3, 3, 8, 5, 6, 7]
System.out.println();
one = new int[]{-13, -14, -15, 16};
two = new int[]{};
System.out.println(Arrays.toString(one) + " << >> " + Arrays.toString(two));
System.out.println("maximusArray: " + Arrays.toString(fun(one,two)));// {0, 0, 0, 16}
System.out.println();
one = new int[]{11, 22, 33};
two = new int[]{-5, 55, 41, -30, 13};
System.out.println(Arrays.toString(one) + " << >> " + Arrays.toString(two));
System.out.println("maximusArray: " + Arrays.toString(fun(one,two)));// {11, 55, 41, 0, 13}
System.out.println();
}
}
错误消息是: ArrayIndexOutOfBoundsException:6 在arrays15.fun(Arrays_Lab15_maximusArrays.java:33) 在arrays15.main(Arrays_Lab15_maximusArrays.java:52)
答案 0 :(得分:2)
fun方法中的第二个for循环似乎导致错误:
for(int h = 0; h < nums2.length; h++) {
b.add(nums1[h]);
}
为什么引用nums1
而不是nums2
?