java - ArrayList 和异常 java.lang.ArrayIndexOutOfBoundsException 上的“for”函数的操作

问题描述

我的代码有问题。我在 ArrayLists 上写了一个简单的操作并有一个异常。下面是我的代码：

for (int i=0;i<Core.Config.amountInclu;i++) {
            Random r = new Random();
            x = r.nextInt(this.tabSizeX);
            y = r.nextInt(this.tabSizeY);
                            Pkt nowy = new Pkt(x,y);
                            while(newPkt.contains(nowy) || onBoundary(x,y)==false){

                                x = r.nextInt(this.tabSizeX);
                                y = r.nextInt(this.tabSizeY);
                            }
                            for(int j = 0; j<Core.Config.sizeInclu;j++){
                                for(int k = 0; k<Core.Config.sizeInclu;j++){
                                    if((x+j)<tabSizeX && (y+k)<tabSizeY){
                                        this.P[x+j][y+k].set_black();
                                        newPkt.add(nowy);
                                    }
                                }

                            }

        }

运行此代码后，我有一个例外：

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException: -2147483648
at growth_1.Plansza.addInclusion(Plansza.java:661)
at growth_1.Display$18.mouseClicked(Display.java:399)
at java.awt.AWTEventMulticaster.mouseClicked(AWTEventMulticaster.java:270)
at java.awt.Component.processMouseEvent(Component.java:6542)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6304)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4544)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:733)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

该算法非常简单，我们在 JPanel (x,y) 上画一个点并检查它是否已被使用以及它是否在更大单元格的边界上。如果是，我们必须画另一点。然后我们必须将点和相邻点设置为黑色。我以为我检查了所有条件以保护点越界。

如果您能给我一些建议，我将不胜感激。

标签： javaarraysexceptionarraylistnetbeans

java - ArrayList 和异常 java.lang.ArrayIndexOutOfBoundsException 上的“for”函数的操作

问题描述

解决方案

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