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我试图在 NetBeans 上制作一个简单的两人井字游戏。

我创建了 6 个文本字段、一个“通过”按钮、一个“新游戏”按钮和一个退出按钮。

“通过”按钮具有代码中的所有功能。代替游戏中的 X 和 O，我使用任意两个整数，例如 1 代表 X，2 代表 O。

游戏画面

这是我的“通过”按钮代码：

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    int  a,b,c,d,e,f,g,h,i;

    a=Integer.parseInt((jTextField1.getText()).trim());
    b=Integer.parseInt((jTextField2.getText()).trim());
    c=Integer.parseInt((jTextField3.getText()).trim());
    d=Integer.parseInt((jTextField4.getText()).trim());
    e=Integer.parseInt((jTextField5.getText()).trim());
    f=Integer.parseInt((jTextField6.getText()).trim());
    g=Integer.parseInt((jTextField7.getText()).trim());
    h=Integer.parseInt((jTextField8.getText()).trim());
    i=Integer.parseInt((jTextField9.getText()).trim());

    if

    (
        // if the grid is empty

            ((((jTextField1.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField2.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField3.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField4.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField5.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField6.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField7.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField8.getText()).trim()).isEmpty())== true)
        &&  ((((jTextField9.getText()).trim()).isEmpty())== true)

    )

    {
        jLabel1.setText("Let's Begin!");
    }

    else if  // if it isn't empty

                (    //if partially full
                ((((jTextField1.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField2.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField3.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField4.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField5.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField6.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField7.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField8.getText()).trim()).isEmpty())== true)
            ||  ((((jTextField9.getText()).trim()).isEmpty())== true)

                 )
                 {


            if
            (
                ((a==b)&&(b==c))
                ||((d==e)&&(e==f))
                ||((g==h)&&(h==i))
                ||((a==d)&&(d==g))
                ||((b==e)&&(d==h))
                ||((c==f)&&(f==i))
                ||((a==e)&&(e==f))
                ||((c==e)&&(e==g))
            )

            {
                jLabel1.setText("We have a winner!");
            }

            else

            {
                jLabel1.setText("Okay, Next Move!");
            }

                 }

    else if
    //it is completely full
    (
            ((((jTextField1.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField2.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField3.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField4.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField5.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField6.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField7.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField8.getText()).trim()).isEmpty())== false)
        &&  ((((jTextField9.getText()).trim()).isEmpty())== false)
    )

    {
        if
        (
            ((a==b)&&(b==c))
            ||((d==e)&&(e==f))
            ||((g==h)&&(h==i))
            ||((a==d)&&(d==g))
            ||((b==e)&&(d==h))
            ||((c==f)&&(f==i))
            ||((a==e)&&(e==f))
            ||((c==e)&&(e==g))
        )

        {
            jLabel1.setText("We have a winner!");
        }

        else

        {
            jLabel1.setText("Nobody wins. :(");
        }

    }

}

如果你觉得这很愚蠢，请告诉我！我只是个业余爱好者。

这是我得到的错误，

Exception in thread "AWT-EventQueue-0" java.lang.NumberFormatException: For input string: ""
at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)
at java.lang.Integer.parseInt(Integer.java:504)
at java.lang.Integer.parseInt(Integer.java:527)
at projet.pys.TEST.jButton1ActionPerformed(TEST.java:181)
at projet.pys.TEST.access$000(TEST.java:11)
at projet.pys.TEST$1.actionPerformed(TEST.java:50)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2018)
at javax.swing.AbstractButton$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)

如果你们完成上述所有内容并帮助我，我将不胜感激。

4

2 回答 2

0

当您调用 parseInt() 时，您的错误正在发生。如果你向这个方法传递一些不能被解释为整数的东西，它会抛出你得到的错误。在这种情况下，当框为空时，您试图解析一个空字符串，这是不允许的。在调用 parseInt() 之前，确认这些框包含可以解释为整数的文本。

另一方面，如果您尝试将此处的一些例程提取到它们自己的方法中，例如 checkWinner() 方法，那将是一件好事。祝你好运，很高兴你开始接触 Java。

于 2013-09-30T20:22:08.813 回答
0

java.lang.NumberFormatException：对于输入字符串：“” <--空字符串无法解析为 int。

于 2013-09-30T20:17:57.683 回答