Question

添加称为currentPhrase一个实例变量来保存当前轮的短语

我的错误消息是“短语无法解析为变量” 我觉得它与新的String（）有关？也许。
或者它可能是短语短语=新短语（）;

package edu.htc.java1.phrasegame;
import edu.htc.java1.phrasegame.model.*;

public class PhraseGameController {

    public void currentPhrase() {
        String p = new String();
        p = Phrase;
    }

}

和

package edu.htc.java1.phrasegame.model;

import java.util.ArrayList;

public class Phrase { 
    public void setPhrase(String phrase) {
        this.phrase = phrase; 
    }

    private String phrase;

    public Phrase(String phrase) {      
        phrase = phrase.toUpperCase();
        for(char c : phrase.toCharArray()) {
            letters.add(new Letter(c));
        }   
    }

    public String getPhrase() {
        return phrase;  
    }

    ArrayList<Letter> letters = new ArrayList<Letter>();

    public ArrayList<Letter> getLetters() {
        return letters;
    }


    public boolean guessLetter(char c) {
        // convert received character to letter
        Letter letter = new Letter(c);

        // loop through your list of letters
        for(Letter l : letters)   {
            // if list of letters contains same letter as the one you received then return true
            if(l.getLetter() == letter.getLetter()) {
                letter.unhide();
                // return true;
            }
        }

        // we did not find the letter, so we return false
        return false;   
    }
}

Answer 1

我认为首先你必须导入这个包：

edu.htc.java1.phrasegame.model;

进入PhraseGameController类。通过在包声明下面添加这个，但在类声明之上：

import edu.htc.java1.phrasegame.model.*;

然后你将在该类中创建一个名为currentPhrase的新变量，如下所示：

private Phrase currentPhrase;

你从那里做的事情超出了你的问题的范围。

Answer 2

实例变量是类的属性。

public class MyClass {
    private static String classVariable;

    private String instanceVariable;

    public String instanceMethod () {
        String localVariable = "hey";
    }

    public static String classMethod {

    }
}

要实例化变量，您必须使用new关键字：

SomeClass someInstance = new SomeClass();

或者如果你使用泛型：

List<SomeType> myList = new ArrayList<SomeType>();

所以在你的情况下它应该是：

public class PhraseGameController {
    private Phrase p = new Phrase();
}

试图在实例变量中调用类

2 个答案: