java 获取“该方法未定义为字符串类型”
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Getting "The method is undefined for the type String"
提问by Paecko
I am a newbie following the book 'Head First Java', and following one of the projects in the book. I ran into an error on the last line of the main method - "The method checkYourself(String) is undefined for the type String"
我是一个新手，关注“Head First Java”一书，并关注本书中的一个项目。我在 main 方法的最后一行遇到了一个错误——“方法 checkYourself(String) 未定义为 String 类型”
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);
}
}
回答by Cristian Meneses
You are calling a method checkYourselffor the String value
您正在调用checkYourselfString 值的方法
userguess.checkYourself(userguess);
... which doesn't exists for the String class.
... String 类不存在。
It should be
它应该是
dotMan.checkYourself(userguess);
回答by Daniel Rodriguez
You would like to do
你想做
String result = dotman.checkYourself(userguess);instead of
代替
String result = userguess.checkYourself(userguess);
The error message means that checkYourselfis not a method in the Stringclass.
错误消息意味着这checkYourself不是String类中的方法。
回答by gashu
result = dotMan.checkYourself(userguess)
结果 = dotMan.checkYourself(userguess)
