Question

我正在编程，创建多个Teacher对象：

public class Teacher {

// 1) Define instance variables
String teacherName;
String catchPhrase;
public static int roomNum;
// 2) Write the constructor method

public Teacher() {
    teacherName = "unknown";
    catchPhrase = "unknown";
    roomNum = 0;
}//end no-arg constructor

public Teacher(String newTeacher, String newCatch, int newRoom) {
    teacherName = newTeacher;
    catchPhrase = newCatch;
    roomNum = newRoom;
}



// 3) Write the proccessing methods (getters and setters)

public void setName(String newName) {
    teacherName = newName;
}

public String getName() {
    return teacherName;
}

public static int getRoom() {
    return roomNum;

}

// 4) Write the out method (eg toString() method)

public String toString() {

    String str = "Name: " + teacherName + ". \nCatch phrase: " + catchPhrase + " \nRoom number: " + roomNum + ".";

    return str;

}//end toString

public static void main(String args[]) {

}
}

执行方式如下：

Teacher teacherName("First Last", "Catch Phrase", 123);

我有多个教师对象。我正在尝试制作一个扫描仪，检查用户的输入，看看输入的数字是否来自其中一个对象的房间号：

 while (input != -1) {
        Scanner scan = new Scanner(System.in);
        input = scan.nextInt();
            if(input == Teacher.getRoom()) {
                System.out.println("Yes");
            } else if(input != Teacher.getRoom()) {
                System.out.println("Nope");
            }

        }

但我不确定该怎么做。或者，如果可能的话。

任何帮助都将受到高度赞赏。

谢谢！

编辑：

我尝试了另一种方式。我尝试使用带有房间号码的数组，并将其与输入进行比较，但它没有工作。

int[] rooms = {220, 226, 204, 234, 236, 242, 243, 129, 125, 136, 101, 104, 107, 113, 103, 105, 102, 108, 117, 111, 111, 313, 310, 132, 127, 129, 125, 
            + 124, 122, 126, 130, 137, 114, 138, 136, 123, 135, 128, 139, 134, 220, 215, 211, 222, 253, 213, 252, 231, 255, 224, 254, 
            + 218, 235, 233, 000, 212, 223, 257, 217, 259, 214, 240, 258, 221, 210, 219, 256, 216, 110, 133, 115, 423, 253, 230, 115, 106, 1062, 418, 415};

 if (rooms.equals(input)) {
            System.out.println("Yes");
        } else {
            System.out.println("Nope");
        }

那不起作用。也没有：

 if (Arrays.asList(rooms).contains(input)) {
            System.out.println("Yes");
        } else {
            System.out.println("Nope");
        }

任何有关在整数数组中使用它的帮助（或更好的方法）都将不胜感激。

谢谢。

EDIT2：

我得到了这样的工作：

if (rooms.contains(input)){
            System.out.println("That teacher is in our database!");
            //System.out.println(new int[(rooms).indexOf(1)]);
        } else {
        System.out.println("Sorry, that teachner was not found in our database!");
    }

非常感谢！

Answer 1

最简单的方法是创建一个Teacher数组，然后在你的while循环中，放一个循环遍历所有Teacher个对象并检查房间号。或者甚至更好，制作一个只是房间号码的数组并循环通过它。

另外，您可能希望在while循环之外实例化扫描程序，然后执行while(scan.hasNextInt()){...

所以它会像

Scanner scan = new Scanner(System.in);
Teacher[] teachears...
while (scan.hasNextInt()) {
    input = scan.nextInt();
    boolean isARoom = false;
    for(Teacher teach : teachers){
        if(input == teach.getRoom()) {
            isARoom = true;
        } 
    }
    if(isARoom)
        System,out.println("Yes");
    else
        System,out.println("No");  
 }

可以这种方式使用扫描仪吗？

1 个答案: