java - 构造函数未定义？枚举错误

Question

public Tipo getTipo() {
    return this.Importo < 0.0 ? Tipo.USCITA : Tipo.ENTRATA;
}

public int compareTo(Movimento m) {
    if (this.idConto != this.idConto) {
        return this.idConto - this.idConto;
    }
    return this.DataMov.compareTo(this.DataMov);
}

public static enum Tipo {
    ENTRATA,// here i have this error : The constructor Movimento.Tipo() is undefined
    USCITA;// here is the same : The constructor Movimento.Tipo() is undefined


    private Tipo(String string2, int n2) {
    }
}

我已经有了所需的构造函数，还需要编写什么？

Answer 1

我不确定如何定义枚举。基本上有两种解决方案:

1.不定义参数枚举

public static enum Tipo {
    ENTRATA,
    USCITA;
}

2.使用参数定义枚举

public static enum Tipo {
    ENTRATA("Entrata", 1),
    USCITA("Uscita", 2);

    private String string;
    private int integer;

    private Tipo(String string, int integer) {
        this.string = string;
        this.integer = integer;
    }
}