java - java中的枚举声明

Question

我已经声明了枚举函数如下

public static enum SHAPE


{
    static
    {
      LINE = new SHAPE("LINE", 3);
      CIRCLE = new SHAPE("CIRCLE", 4);
      TEXT = new SHAPE("TEXT", 5);
      SHAPE[] arrayOfSHAPE = new SHAPE[6];
      arrayOfSHAPE[0] = DRAW;
      arrayOfSHAPE[1] = SQUARE;
      arrayOfSHAPE[2] = TRIANGLE;
      arrayOfSHAPE[3] = LINE;
      arrayOfSHAPE[4] = CIRCLE;
      arrayOfSHAPE[5] = TEXT;
    }
  }

但是我得到了

Syntax error, insert "}" to complete Block at line4 and getting Syntax error, insert "EnumBody" to complete EnumDeclaration at line1.

所以请协助我声明这个枚举。提前致谢。

Answer 1

您的枚举声明存在多个问题:

1. 枚举声明中的静态没有任何意义，会导致编译错误。
2. 您需要在类(class)开始时定义枚举的值(见下文)。
3. 数组声明应该在静态 block 之外

这应该可以，我也稍微清理了一下代码:

public enum Shape {
    LINE("LINE", 3),
    CIRCLE("CIRCLE", 4),
    TEXT("TEXT", 5),
    // DRAW, SQUaRE, TRIANGLE, ...
    ;

    public static final Shape[] SHAPES= new Shape[6];

    static
    {
      SHAPES[0] = DRAW;
      SHAPES[1] = SQUARE;
      SHAPES[2] = TRIANGLE;
      SHAPES[3] = LINE;
      SHAPES[4] = CIRCLE;
      SHAPES[5] = TEXT;
    }

    // Constructor etc.
}

我认为您不需要 SHAPES 数组，因为您可以通过调用访问枚举的所有值:Shape.values()