当不等于时,整数不会比较

时间:2015-03-29 07:28:20

标签: java arrays netbeans integer compare

我有一种方法可以通过将student数组和topStudentIndex作为参数来计算学生数组中的下一个最高分,这是通过topStudentIndex in的另一种方法计算的我的主要。

以下是我的方法:

public static int calNextHighestOverallStudentIndex(Student[] st, int topStudentIndex) {

    double nextHighestOverall= 0;
    int secondHighestStudentIndex = 0;
    for (int i = 0; i < st.length; i++) {
        if ((st[i] != null) && (!(st[i].getStudentIndex() == topStudentIndex))) {
            System.out.println(topStudentIndex+ " compare with i = "+i);
            double currentOverall= st[i].getOverall();
            if (currentOverall> nextHighestOverall) {
                nextHighestOverall= currentOverall;
                secondHighestStudentIndex = i;
            }
        }
    }
    return secondHighestStudentIndex ;
}

我接受顶尖学生的索引位置,并检查阵列位置是否为空&amp;&amp;相同的指数。如果没有,检查将继续。

但是,输出显示索引位置的比较不起作用。

1 compare with i = 0
1 compare with i = 1
1 compare with i = 2
1 compare with i = 3
1 compare with i = 4
1 compare with i = 5
1 compare with i = 6

我尝试使用!=和我目前的检查方式,但无济于事。

1 个答案:

答案 0 :(得分:1)

if ((st[i] != null) && (!(st[i].getStudentIndex() == topStudentIndex))) {
            System.out.println(topStudentIndex+ " compare with i = "+i);

您正在将topStudentIndexst[i].getStudentIndex()进行比较,但在打印声明中打印i

要么

if ((st[i] != null) && (!(i == topStudentIndex)))

或打印

 System.out.println(topStudentIndex+ " compare with student index = "+ st[i].getStudentIndex());

明白为什么比较失败。