Question

嗯，我在我的Class Object2D中调整了这个方法，它应该调整Object2D的二维Color-Array PointInformation，它被调用到某个百分比。（我发现将2D阵列转换为一维阵列时更容易做到）

public class Object2D

{
int width;
int height;
int ResizePercentage = 100;
Color PointInformation[][];


public void Resize(int Percentage)
{
    Color[]temp = Standart_Methods.Reduce2DArray(this.PointInformation);
    int temp_width = this.width;
    int temp_height = this.height;
    double Faktor = (Percentage+100)/100;
    this.width = (int) (this.width*Faktor);
    this.height = (int) (this.height*Faktor);
    this.ResetPointInformation();
    Color[]temp2 = Standart_Methods.Reduce2DArray(this.PointInformation);

    int SamePixelCount = 0;
    Color LastColor = temp[0];
    for (int i = 0; i < temp.length; i++)
    {
        if (temp[i] == LastColor )
        {
            SamePixelCount += 1;
        }
        else
        {
            for (int i2 = (int) (i*Faktor); i == 1; i-- )
            //Method Resize will only be called when i*Faktor is going to be 100% = X.0 (An Integer)
            {
            temp2[i*2-i] = LastColor;      
            }
            SamePixelCount = 0;
        }
    }
    Standart_Methods.PrintArray(temp2);
    int a = 10;
    int b = 0;
    System.out.print(a/b); //No Exeption, Code unreachable!?       
}
}

它基本上从temp [0]开始，只要找到相同的Color，就会向int SamePixelCount添加1。找到不同的颜色后，该方法会将前一个像素的颜色写入temp2数组中的右侧位置。

for (int i = 0; i < temp.length; i++)
{
    if (temp[i] == LastColor )
    {
        SamePixelCount += 1;
    }
    else
    {
        for (int i2 = (int) (i*Faktor); i == 1; i-- )
        //Method Resize will only be called when i*Faktor is going to be 100% = X.0 (An Integer)
        {
        temp2[i*2-i] = LastColor;      
        }
        SamePixelCount = 0;
    }
}

操作数组temp2到Object的PointInformation的正确转换仍然缺失，因为我想测试一下，如果temp2正确调整了temp的大小，那么我做了

Standart_Methods.PrintArray(temp2); //the Method works btw

但它什么也没做！甚至是bader！我放在那个命令所在的一切，也没有！

    int a = 10;
    int b = 0;
    System.out.print(a/b); //No Exeption!

更奇怪的是，只要我在某个地方调用方法调整大小，呼叫之后的所有内容都会变成同样奇怪的无法访问的代码！？

我对可能导致这个问题的原因完全不了解。

任何帮助都会很棒！

Answer 1

除以零肯定会给你ArithmeticException：

public class Test {
    public static void main(String[] args) {
        int a = 10;
        int b = 0;
        System.out.println(a/b);
    }
}   

Exception in thread "main" java.lang.ArithmeticException: / by zero
at Test.main(Test.java:14)

我建议使用eclipse并使用调试器跟踪代码。检查每个代码行的变量，我相信你可以找出我们的错误

奇怪的无法访问但可编译的代码

1 个答案: