我已经编写了这个方法来查找大于数组中特定值的值的数量,它适用于具有正整数的arrray但是当我尝试这个测试用例时它失败了。
public static int numGreater(int[] a, int val) {
if (a == null || a.length == 0) {
throw new IllegalArgumentException();
}
int[] copy = Arrays.copyOf(a, a.length);
Arrays.sort(copy);
int answer = 0;
int nearest = copy[0];
for (int i = 0; i < copy.length; i++) {
if (Math.abs(nearest - val) > Math.abs(copy[i] - val)) {
nearest = copy[i];
answer = (copy.length - 1) - i;
}
}
return answer;
}
以下是我使用JUnit运行的测试用例。
int z[] = {-5,-2,0,4,8,15,50};
@Test public void numGreaterTest1() {
Assert.assertEquals(7, Selector.numGreater(z, -99));
}
关于我哪里出错的任何想法?
答案 0 :(得分:0)
public static int numGreater(int[] a, int val) {
if (a == null || a.length == 0) {
throw new IllegalArgumentException();
}
int answer = 0;
for (int i = 0; i < a.length; i++) {
if (a[i]>val) {
answer++;
}
}
return answer;
}