怎么了？:(

Question

if((wort[0] == "A") && (wort[1] == "P") && (wort[2] == "F") && (wort[3] == "E") && (wort[4] == "L") && (wort[5] == "K") && (wort[6] == "U") && (wort[7] == "C") && (wort[8] == "H") && (wort[9] == "E") && (wort[10] == "N")) {

        frame.remove(panel);
        frame.add(winpanel);
        winpanel.add(winmeldung);
        winpanel.add(beenden);
        frame.validate();

嗨,我这里有一个庞大的项目,所以我只发布一部分内容.我想检查一下,如果确实应该打开一个新的面板.但每次我跑,我都会因为"未知来源"而收到错误.为什么？？

编辑:

错误:

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)

Answer 1

肯定错误的一件事是:

wort[0] == "A"

应该

wort[0].equals( "A")

String比较总是应该使用equals()而不是==(除了字符串文字比较的情况)

关于更新的异常,请参阅此(或)此讨论可能有所帮助.