Java 在 JPanel 内声明serialVersionUID 时出错

Question

我收到这个错误，这让我从这段脚本中感到非常沮丧......

    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);
//          }

        };

我试图在 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。

Answer 1

声明

this.setEditable(false);

需要位于方法、静态初始值设定项或构造函数中，而不是位于 JTextArea output 的匿名实现的类 block 中。如果您确实希望在 output 类中实现此实现，您可以重写 isEditable

@Override
public boolean isEditable() {
   return false;
}