如何检查用户输入是否与2D数组的元素匹配？JAVA

Question

我正在创建一个学生成绩手册，允许用户输入学生姓名和4个成绩，然后可以选择计算学生和班级平均成绩，如下图所示

根据下面的代码，我收到的学生平均成绩为“0.0%”，没有错误。我是否正确指示程序查看学生名称是否与二维数组中的相应元素匹配

我让程序的其他部分都在工作

private String[][] grades = new String[16][5];

//Declare Variables
String firstName, lastName, name;
String test1, test2, test3, test4;

test1 = t1Input.getText();
test2 = t2Input.getText();
test3 = t3Input.getText();
test4 = t4Input.getText();

firstName = firstInput.getText();
lastName = lastInput.getText();
name = firstName + " " + lastName + ": ";

grades[students][0] = name;
grades[students][1] = test1;
grades[students][2] = test2;
grades[students][3] = test3;
grades[students][4] = test4;

students++;

private void sAvgInputActionPerformed(java.awt.event.ActionEvent evt) {
    String firstName = firstInput.getText();
    String lastName = lastInput.getText();
    String name = firstName + " " + lastName + ": ";
    int sum = 0;
    double divide = 0;

    for (int i = 0; i <= 1; i++) {
        if (name.equals(grades[0][1])) {
            for (int grade = 1; grade <= 4; grade++) {
                sum = Integer.parseInt(grades[i][1]) + i;
            }
            break;
        }
    }
    divide = sum / 4;
    gradesOutput.setText(firstName + "'s grade average is " + divide + "%.");
}

Answer 1

将循环更改为：

//assume it as a simple table since its 2d array
//Since you are storing the name in first(0th index) column,
//only row should be loop
for (int i = 0; grades[i][0] != null; i++) {
    if (name.equals(grades[i][0])) {
        for (int grade = 1; grade <= 4; grade++)
            //same row,different column
            sum = sum + Integer.parseInt(grades[i][grade]);
        break;
    }
}