[英]It is possible to use a Scanner in this manner?
我正在编写一些东西,它创建了多个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[]) {
}
}
它是这样执行的:
Teacher teacherName("First Last", "Catch Phrase", 123);
我有多个教师对象。 我正在尝试使扫描仪检查用户输入,以查看输入的数字是否是这些对象之一的房间号:
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");
}
}
但是我不确定该怎么做。 或者,如果有可能。
任何帮助将不胜感激。
谢谢!
编辑:
我尝试了另一种方式。 我试图使用带有房间号的数组,并将其与输入进行比较,但是没有用。
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");
}
那没用。 也没有:
if (Arrays.asList(rooms).contains(input)) {
System.out.println("Yes");
} else {
System.out.println("Nope");
}
任何帮助使它与整数数组(或更好的方法)一起使用的方法,将不胜感激。
谢谢。
EDIT2:
我让它像这样工作:
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!");
}
非常感谢你!
最简单的方法是创建一个Teacher
数组,然后在while循环内,放置一个for循环,循环遍历所有Teacher
对象并检查房间号。 甚至更好的是,仅排列房间号的数组并循环遍历。
另外,您可能想在while循环之外实例化扫描程序,然后执行while(scan.hasNextInt()){...
所以就像
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");
}
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