Java无法找到带有链表的符号

Question

我试图询问列表是否包含某个字符串。

public void searchList(Scanner scan, Object list){


    System.out.println("Search for element:\t");
    String p = scan.nextLine();

    if (list.contains(p))
        System.out.println(p + " is in the list");
    else
        System.out.println(p + " is not in the list.");
}

我得到:

Prog7Methods.java:23: cannot find symbol
symbol  : method contains(java.lang.String)
location: class java.lang.Object
        if (list.contains(p))

我不明白!我已经导入了 java.io.* 和 java.util.* 它怎么不识别这个？

Answer 1

您需要将列表声明为列表。而不是

public void searchList(Scanner scan, Object list){

使用

public void searchList(Scanner scan, List list){

或者更好:

 public void searchList(Scanner scan, List<String> list){