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我收到了这个错误,这让我对这段脚本感到非常沮丧......

    JPanel menu = new JPanel() {
            private static final long serialVersionUID = 1L;
            JTextArea output = new JTextArea(5, 30) {

                /**
                 * 
                 */
                private static final long serialVersionUID = 4714318125998709253L;
                this.setEditable(false);
            };
            JScrollPane scrollPane = new JScrollPane(output);

//          public void run() {
//              System.out.println("lol");
//              JPanel menu = this;
//              JButton restart = new JButton("Restart");
//              menu.add(restart);
//          }

        };

我正在尝试在 JTextArea 输出中声明 setEditable ......有什么想法吗?

编辑:错误是:

Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problem: 
    Syntax error on token ";", < expected

    at citadelRPG.Server.createAndShowGUI(Server.java:94)
    at citadelRPG.Server.access$0(Server.java:16)
    at citadelRPG.Server$1.run(Server.java:162)
    at java.awt.event.InvocationEvent.dispatch(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$000(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

出现在声明 serialVersionUID 的分号上。

4

2 回答 2

3

该声明

this.setEditable(false);

需要在方法、静态初始化程序或构造函数中,而不是在匿名实现的类块中JTextArea output。如果你真的希望在output类中有这个实现,你可以覆盖isEditable

@Override
public boolean isEditable() {
   return false;
}
于 2013-03-18T20:21:16.317 回答
1

this.setEditable(false);需要在构造函数或方法的上下文中定义。不能在这些上下文之外调用它。

我觉得人们坚持以这种方式实现类非常奇怪,但这只是我。

您没有向 中添加任何新功能JPanel,那么为什么不直接创建它, a JTextarea, aJScrollPane并一起添加它们。它将使您的代码更具可读性并解决此类愚蠢的错误。

就个人而言,更好的解决方案是......

JPanel menu = new JPanel() {
    private static final long serialVersionUID = 1L;
};
JTextArea output = new JTextArea(5, 30) {
    private static final long serialVersionUID = 4714318125998709253L;
};
output.setEditable(false);
JScrollPane scrollPane = new JScrollPane(output);
menu.add(scrollPane);
于 2013-03-18T20:23:14.333 回答