java枚举如何在枚举对象内返回枚举的字符串内容

Question

范例

public enum STUFF
{
    THING("Ok"), STUFF("Sweet"), PEOPLE("umm"), CAR("Vrrm");

    String contents;

    STUFF(String x)
    {
       contents = x;
    }

    public String getContents()
    {
        return ??
    }

}

预期结果：

System.out.print(STUFF.CAR.getContents());
//Vrrm

Answer 1

您应该在以下位置查看行星示例：http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

public enum STUFF
{
    THING("Ok"), STUFF("Sweet"), PEOPLE("umm"), CAR("Vrrm");

    private final String contents;

    STUFF(String x)
    {
        contents = x;
    }

    public String getContents()
    {
        return contents;
    }
 }

Answer 2

构造函数中的赋值错误

x = contents;

应为：-

contents = x;

并且getContents()中的返回值应为：-

public String getContents()
{
    return contents;
}