AWT-EventQueue-0“;java.lang.ArrayIndexOutOfBoundsException
我是一名java初学者,我正在努力理解我朋友所写内容中的问题,我认为问题在于数组大小不同。如果有人能帮忙,我将不胜感激 问题AWT-EventQueue-0“;java.lang.ArrayIndexOutOfBoundsException,java,arrays,Java,Arrays,我是一名java初学者,我正在努力理解我朋友所写内容中的问题,我认为问题在于数组大小不同。如果有人能帮忙,我将不胜感激 问题 Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3 at fmenu$fillbuttonListener.actionPerformed(fmenu.java:115) at javax.swing.AbstractButton.fireAc
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: 3
at fmenu$fillbuttonListener.actionPerformed(fmenu.java:115)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
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)
这就是我认为问题所在
public void actionPerformed(ActionEvent e)
{
Random randomNumbers = new Random();
studentarray = new Object[numofstudent];
quizarray = new Object[numofstudent][numofquiz]; //quizarray = new int[numofstudent][numofquiz]; (original)
for(int i=0; i<numofstudent; i++)
{
quizarray[0][i] = baseid+i;
System.out.println(quizarray[0][i]);
//studentarray[i] = baseid+i;
for(int j=1; j<numofquiz+1; j++)
{
int number = randomNumbers.nextInt(100);
quizarray[j][i] = number; // row column
System.out.println(quizarray[j][i]);
}
}
public void actionPerformed(ActionEvent e)
{
随机数=新随机数();
studentarray=新对象[numofstudent];
quizarray=new Object[numofstudent][numofquick];//quizarray=new int[numofstudent][numofquick];(原件)
对于(int i=0;i您定义:
quizarray = new Object[numofstudent][numofquiz]
然后使用
quizarray[0][i]
其中i
是numofstudent
。我想您只需要:
quizarray[i][0]
我们不知道你的二维数组有多大。仅供参考-它告诉你错误在第115行。如果你指出第115行会有帮助。quizarray[j][i]=数字;这是第115行,那么我仍然认为我的答案是正确的。你似乎在交换学生和测验字段。那一行将是quizarray[i][j]
,因为i
指学生,j
指测验。