Question

我在做什么：在下面的代码片段中，我打印出条形图的X轴，这取决于不同长度的单词数量。例如。最大的单词是长度6，所以X轴沿底部有1,2,3,4,5,6。

问题是：代码完全正常，但我在paint方法中返回错误。

我尝试过：通过将代码块放入paint方法中调用的方法来隔离导致问题的代码行。

使用过的变量：

lengthCountArray.length（数组长度决定了底部有多少个数字）

int canvasWidth = 410; 
int inferiorLeftCornerX = 50; // this the the x point of the left corner on the x axis
int inferiorLeftCornerY = 470; // this the the y point of the left corner on the x axis
int barWidth = canvasWidth / lengthCountArray.length; // this calculates the distance for the bars
int posLabelX = barWidth / 2; // this puts the label in the centre of the bars by halving it 
posLabelX = inferiorLeftCornerX - posLabelX; // this is so that the initial number isn't indented twice

for (int a = 1; a <  (lengthCountArray.length+1); a++){
    posLabelX = posLabelX + barWidth;
    g.drawString(String.valueOf(a), posLabelX, inferiorLeftCornerY);
}

引起问题的行是“int barWidth = canvasWidth / lengthCountArray.length; //这会计算条纹的距离”（第122行）。

返回以下错误：

Exception in thread "AWT-EventQueue-1" java.lang.ArithmeticException: / by zero
    at java_assignment.JavaAppletMain.paint(JavaAppletMain.java:122)
    at sun.awt.RepaintArea.paintComponent(RepaintArea.java:264)
    at sun.lwawt.LWRepaintArea.paintComponent(LWRepaintArea.java:54)
    at sun.awt.RepaintArea.paint(RepaintArea.java:240)
    at sun.lwawt.LWComponentPeer.handleJavaPaintEvent(LWComponentPeer.java:1267)
    at sun.lwawt.LWComponentPeer.handleEvent(LWComponentPeer.java:1150)
    at java.awt.Component.dispatchEventImpl(Component.java:4937)
    at java.awt.Container.dispatchEventImpl(Container.java:2287)
    at java.awt.Component.dispatchEvent(Component.java:4687)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
    at java.awt.EventQueue.access$200(EventQueue.java:103)
    at java.awt.EventQueue$3.run(EventQueue.java:694)
    at java.awt.EventQueue$3.run(EventQueue.java:692)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:87)
    at java.awt.EventQueue$4.run(EventQueue.java:708)
    at java.awt.EventQueue$4.run(EventQueue.java:706)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
    at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
    at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

我一直试图解决这个问题几个小时，然后才产生StackOverflow，所以如果您需要更多信息，请不要犹豫！

感谢您查看我的问题。

Answer 1

虽然我不想实现随机的if语句，但是我必须用0来抵消除法.if语句如下：

if (lengthCountArrayLength == 0){
            lengthCountArrayLength = 1;
        }

感谢您的评论。如果您找到更好的方法，请做出评论或留下答案！

Java Applet返回“java.lang.ArithmeticException：/ by zero”

1 个答案: