Question

我无法使用访问器方法将toString中的字符返回到主类中。

public class Alpha
{
  .
  .
  .
  public char getLetter()  
  {  
      return letter;  
  }  

  public String toString()
  {
    String str = "This is the letter " + letter;
    return str;
  }

第二个程序

public class AlphaDemo
{
  public static main........
  {
    Alpha xxNewLetter = new Alpha(.....);
    System.out.println(xxNewLetter);
  }
}

我不明白我做错了什么。

Answer 1

您的课程应如下所示。

public class Alpha {
    char letter;

    public Alpha(char letter) {
        this.letter = letter;
    }

    public char getLetter() {
        return letter;
    }

    public String toString() {
        String str = "This is the letter " + letter;
        return str;
    }
}

和Alpha演示

public class AlphaDemo {
    public static void main(String arg[]) {
        Alpha xxNewLetter = new Alpha('A');
        System.out.println(xxNewLetter);
    }
}

如何在主程序中打印存取方法？

1 个答案: