获取＆＃34;该方法未定义类型String＆＃34;

Question

我是新手，跟随着这本书的第一篇Java＆＃39;，并按照本书中的一个项目。我在main方法的最后一行遇到错误 - ＆＃34;方法checkYourself（String）未定义类型String＆＃34;

class dotcom{
    int [] Locationcells;
    int hits = 0;

public String checkYourself(String guess){
    int guess1 = Integer.parseInt(guess);
    String result = "miss";

    for(int cell : Locationcells){
        if(guess1 == cell){
            result = "hit";
            hits = hits + 1;
            break;
        }
    }
    if (hits == Locationcells.length){
        result = "kill";



    }
    System.out.println(result);
    return result;


}
public void setCellLocations(int []locs){
    Locationcells = locs;

}
}




public class SimpleDotComGame {
    public static void main(String[] args) {
        dotcom dotMan = new dotcom();
        int locations [] = {3,4,5};
        dotMan.setCellLocations(locations);


        String userguess = "2";
        String result = userguess.checkYourself(userguess);



}
}

Answer 1

您正在为字符串值

调用方法checkYourself

userguess.checkYourself(userguess);

... String类不存在。

应该是

dotMan.checkYourself(userguess);

Answer 2

你想做

String result = dotman.checkYourself(userguess);

而不是

String result = userguess.checkYourself(userguess);

错误消息表示checkYourself不是String类中的方法。

Answer 3

result = dotMan.checkYourself（userguess）