我正在编写一个程序,其中我定义了类函数,并具有对它们执行算术运算的方法。在输出中,在我的 FractionDemo 类中,我在尝试编写输出、获取 @12f9de 等内容时遇到了问题。所以我知道我需要重写该toString
函数,但我遇到了找不到符号错误。
这是我的代码:
功能:
public class Fraction
{
int numerator;
int denominator;
public Fraction(int numerator, int denominator)
{
this.numerator = numerator;
this.denominator = denominator;
}
public void setNumerator(int numerator)
{
this.numerator = numerator;
return;
}
public void setDenominator(int denominator)
{
this.denominator = denominator;
return;
}
public int getNumerator()
{
return numerator;
}
public int getDenominator()
{
return denominator;
}
public static Fraction add(Fraction fraction1, Fraction fraction2)
{
Fraction fraction3 = new Fraction(((fraction1.getNumerator() * fraction2.getDenominator()) + (fraction1.getDenominator() * fraction2.getNumerator())), (fraction1.getDenominator() * fraction2.getDenominator()));
return fraction3;
}
public static Fraction subtract(Fraction fraction1, Fraction fraction2)
{
Fraction fraction3 = new Fraction(((fraction1.getNumerator() * fraction2.getDenominator()) - (fraction1.getDenominator() + fraction2.getNumerator())), (fraction1.getDenominator() * fraction2.getDenominator()));
return fraction3;
}
public static Fraction multiply(Fraction fraction1, Fraction fraction2)
{
Fraction fraction3 = new Fraction((fraction1.getNumerator() * fraction2.getNumerator()), (fraction1.getDenominator() * fraction2.getDenominator()));
return fraction3;
}
public static Fraction divide(Fraction fraction1, Fraction fraction2)
{
if (fraction2.getNumerator() != 0)
{
Fraction fraction3 = new Fraction((fraction1.getNumerator() * fraction2.getDenominator()), (fraction1.getDenominator() * fraction2.getNumerator()));
return fraction3;
}
else throw new IllegalArgumentException("Division by Zero");
}
}
分数演示:
public class FractionDemo
{
public static void main(String[] args)
{
Fraction fraction1 = new Fraction(4,7);
Fraction fraction2 = new Fraction(5,6);
Fraction fractionSum = Fraction.add(fraction1, fraction2);
System.out.println(fractionSum);
Fraction fractionDif = Fraction.subtract(fraction1, fraction2);
System.out.println(fractionDif);
Fraction fractionProd = Fraction.multiply(fraction1, fraction2);
System.out.println(fractionProd);
Fraction fractionDividend = Fraction.divide(fraction1, fraction2);
System.out.println(fractionDividend);
}
public String toString()
{
return ("The result is: " + numerator + "/" + denominator);
}
}
无论如何,有什么办法可以让输出正确格式化?它说在 FractionDemo 底部的 toString 部分中找不到我的变量。无论我是否使用变量名、像 [fractionSum.getNumerator] 之类的函数调用或其他任何东西。我会马上说我并不真正理解覆盖 toString 的东西,我对 Java 还是很陌生。
让我知道是否有任何我应该添加的内容。