我有一个类项目，我需要创建一个需要用户输入的程序，我想创建一个获取用户输入并将值返回给 main 的方法，由于某种原因，当我使用下面的代码时出现以下错误，
Names.java:40：错误：不兼容的类型 userInput = kb.next(); ^ 必需：int 找到：字符串
public static void main(String[] arg)
throws FileNotFoundException{
Scanner kb = new Scanner(System.in);
Scanner fileInput = new Scanner(new File("names.txt"));
System.out.println("This program allows you to search through the");
System.out.println("data from the Social Security Administration");
System.out.println("name popularity since 1900.");
int userInput;
do{
userInput = getInput(kb);
if(userInput == 1)
namePopularity();
if(userInput == 2)
nameCompare();
if(userInput == 3)
nameRank();
}while(userInput == 4);
}
//Gets the user input
public static int getInput(Scanner kb){
int userInput;
do{
System.out.println("Choose a task number from the following:");
System.out.println("1-See histogram of a name's popularity");
System.out.println("2-Compare two names in a specific decade");
System.out.println("3-Show what name had a specific rank for a certain decade");
System.out.println("4-Exit Program");
userInput = kb.next();
}while(!userInput.hasNextInt());
return userInput;
}
我尝试将其分解为一个更简单的版本，如下所示，但我一直收到该错误消息，我不知道为什么它将它作为字符串而不是扫描仪读取，有人可以帮助我吗，直到我尝试使用扫描仪用不同的方法。
public static void main(String[] arg)
throws FileNotFoundException{
Scanner kb = new Scanner(System.in);
Scanner fileInput = new Scanner(new File("names.txt"));
int userInput;
System.out.println(getInput(kb));
}
public static int getInput(Scanner kb){
int userInput;
System.out.println("write something");
userInput = kb.next();
return userInput;
}