SimpleDotCom game Issues

[Hozi Surat]

Hi,

I am going through the Head First Java book and I am working with the SimpleDotCom game. Everytime I compile my code I keep getting the following three errors and I can't figure out what my issues are. Please help. Thanks.

my SimpleDotCom class

public class SimpleDotCom{
int[] locationCells;
int numOfHits = 0;

public void setLocationCells(int[] locs){
locationCells = locs;
}

public String checkYourself(String stringGuess){
int guess =Integer.parseInt(stringGuess);
String result= "miss";
for (int cell : locationCells) {
if (guess ==cell){
result="hit";
numOfHits++;
break;
}
}

if(numOfHits == locationCells.length){
result="kill";
}

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

my GameHelper class

import java.io.*;


public class GameHelper{
public String getUserInput(String prompt) {
String inputLine=null;

System.out.print(prompt +" ");

try {
BufferedReader is = new BufferedReader(
new InputStreamReader(System.in)
);

inputLine = is.readLine();
if(inputLine.length()==0) return null;

}

catch (IOException e) {
System.out.println("IOException:" + e);
}

return inputLine;
}

}

and my Game class

public class game{
    public static void main(String[] args){
    
    int numOfGuesses =0;
    GameHelper helper = new GameHelper();
    
    
    SimpleDotCom theDotCom = new SimpleDotCom();
    
    int randomNum = (int) (Math.random() * 5);
    
    int[] locations=(randomNum,randomNum+1,randomNum+2);
    
    theDotCom. setLocationCells(locations);
    
    boolean isAlive= true;
    
    while(isAlive=true) {
    
    String guess = helper.getUserInput("enter a number");
    String result = theDotCom.checkYourself(guess);
    
    numOfGuesses++;
    
    if (result.equals("kill")) {
    isAlive=false;
    
    System.out.println("You took " + numOfGuesses + " guesses");
    }
    }

    }

here are my errors



int[] locations=(randomNum,randomNum+1,randomNum+2);
^
Syntax error on token "=", Name expected after this token
----------
----------

inputLine = is.readLine();
^^^^^^^^^^^^^
Type mismatch: cannot convert from java.lang.String to com.sun.org.apache.xpath.internal.operations.String
----------

if(inputLine.length()==0) return null;
^^^^^^
The method length() is undefined for the type String
----------

[Johan Fourie]

Hi.

int[] locations=(randomNum,randomNum+1,randomNum+2);

That is not how you initialize an array.

[Joel Christophel]

Hozi Surat wrote:
int[] locations=(randomNum,randomNum+1,randomNum+2);
^
Syntax error on token "=", Name expected after this token

Your parenthesis should be curly brackets.

Hozi Surat wrote:
inputLine = is.readLine();
^^^^^^^^^^^^^
Type mismatch: cannot convert from java.lang.String to com.sun.org.apache.xpath.internal.operations.String

--------

if(inputLine.length()==0) return null;
^^^^^^
The method length() is undefined for the type String

It seems you are using the wrong String class. Do you happen to have an import at the top of your class that looks something like:

import com.sun.org.apache.xpath.internal.operations.String;

If so, remove it.

[Campbell Ritchie]

Welcome to the Ranch

One of the naughty habits of Eclipse is providing a long list of potential imports; it is very easy to click on the wrong one. You should not import String at all; it is in the java.lang package.

[Hozi Surat]

Thanks that was it the {} and the import statement.


Also thank you for the info about the import.

I have a question when eclipse gives me more than 1 option for import how do i go about determining+++ which one to use?