StringTokenizer error: incompatible types: Object cannot be converted to String

Question

我的代码：

class Customer
{
String name_dob,name,dob,dd,mm,yyyy;
void stringTokenize()
{
    StringTokenizer st1 = new StringTokenizer(name_dob,",");
    name = st1.nextElement();
    dob = st1.nextElement();
    StringTokenizer st2 = new StringTokenizer(dob,"/");
    dd = st2.nextElement();
    mm = st2.nextElement();
    yyyy = st2.nextElement();
}
void display()
{
    System.out.println(name + "," + dd + "," + mm + "," + yyyy);
}
}
public class Main
{
public static void main(String[] args) {
    int i,n;
    Scanner sc = new Scanner(System.in);
    System.out.println("Enter the number of data");
    n = sc.nextInt();
    Customer[] obj = new Customer[n];
    for(i=0;i<n;i++)
    {
        obj[i] = new Customer();
        System.out.println("Enter the data");
        obj[i].name_dob = sc.nextLine();
        obj[i].stringTokenize();
    }
    System.out.println("After tokenizing........");
    for(i=0;i<n;i++)
    {
        System.out.println("The data is");
        obj[i].display();
    }

}
}

我得到的错误

Main.java:23: error: incompatible types: Object cannot be converted to String name = st1.nextElement();

Main.java:24: error: incompatible types: Object cannot be converted to String dob = st1.nextElement();

Main.java:26: error: incompatible types: Object cannot be converted to String dd = st2.nextElement();

Main.java:27: error: incompatible types: Object cannot be converted to String mm = st2.nextElement();

Main.java:28: error: incompatible types: Object cannot be converted to String yyyy = st2.nextElement();

Answer 1

使用 nextToken 而不是 nextElement。

nextElement 的文档说：

Returns the same value as the nextToken method, except that its declared return value is Object rather than String.

Answer 2

您可能想使用 nextToken 而不是 nextObject。或者使用 nextObject 并将其转换为 String 但这似乎是一个开销。

看看Javadoc

nextElement() Returns the same value as the nextToken method, except that its declared return value is Object rather than String.

StringTokenizer error: incompatible types: Object cannot be converted to String

StringTokenizer error: incompatible types: Object cannot be converted to String

java

stringtokenizer

java.util.scanner