Display类中捕获异常

时间:2011-03-14 12:39:16

标签: java java-me j2mepolish

嗨嗨朋友我的代码中出现错误。我的项目成功编译&从开始运行良好,但当我正在触发移动中键时,它显示错误,就像那样......

TRACE: <at java.lang.Error: ClassFormatError:  56>, Exception caught in Display class
java.lang.Error: ClassFormatError:  56
        at java.lang.Class.invoke_verify(), bci=0
        at java.lang.Class.initialize(), bci=117
        at com.ui.PreviewPageUI.getPreviewData(), bci=0
        at com.ui.PreviewPageUI.keyPressedMainCatFire(), bci=54
        at com.ui.PreviewPageUI.keyPressedFire(PreviewPageUI.java:451)
        at com.ui.PreviewPageUI.keyPressed(PreviewPageUI.java:284)
        at javax.microedition.lcdui.CanvasLFImpl.uCallKeyPressed(), bci=19
        at javax.microedition.lcdui.DisplayableLFImpl.uCallKeyEvent(), bci=146
        at javax.microedition.lcdui.Display$DisplayEventConsumerImpl.handleKeyEvent(), bci=30
        at com.sun.midp.lcdui.DisplayEventListener.process(), bci=277
        at com.sun.midp.events.EventQueue.run(), bci=179
        at java.lang.Thread.run(Thread.java:662)

请帮我解决如何删除此错误...谢谢 这是我的功能代码

private void getPreviewData(final String cat) {
        Thread th = new Thread() {

            public void run() {
                try {
                    if (cat.equals("VD")) {
                        if (videoHastable == null || videoHastable.isEmpty()) {
                            initializeWaiting();
                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","VD");
                            } catch (JSONException ex) {
                                System.out.println(ex.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();

                            videoHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (videoHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "VIDEOS", videoHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else if (cat.equals("WP")) {
                        if (wallHastable == null || wallHastable.isEmpty()) {
                            initializeWaiting();

                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","WP");
                            }catch(JSONException e){
                                System.out.println("json excep:"+e.toString());
                            }catch(Exception e){
                                System.out.println("error in wp getpriview:"+e.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();
                            System.out.println("I am in wallpaper getpreiview");
                            wallHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (wallHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "WALLPAPERS", wallHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else if (cat.equals("GM")) {
                        if (gamesHastable == null || gamesHastable.isEmpty()) {
                            initializeWaiting();

                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","GM");
                            } catch (JSONException ex) {
                                System.out.println(ex.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();
                            gamesHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (gamesHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "GAMES", gamesHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else if (cat.equals("TH")) {
                        if (themesHastable == null || themesHastable.isEmpty()) {
                            initializeWaiting();

                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","TH");
                            } catch (JSONException ex) {
                                System.out.println(ex.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();
                            themesHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (themesHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "THEMES", themesHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else if (cat.equals("AN")) {
                        if (animateHastable == null || animateHastable.isEmpty()) {
                            initializeWaiting();

                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","AN");
                            } catch (JSONException ex) {
                                System.out.println(ex.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();
                            animateHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (animateHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "ANIMATIONS", animateHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else if (cat.equals("FS")) {
                        if (freeHastable == null || freeHastable.isEmpty()) {
                            initializeWaiting();

                            ParseUrl parsedata=new ParseUrl();
                            json=new JSONObject();
                            try {
                                json.put("phonetype",Midlet.PHONE_TYPE);
                                json.put("cat","FS");
                            } catch (JSONException ex) {
                                System.out.println(ex.toString());
                            }
                            String url="http://localhost:8084/MagicWeb/pappilon1?json="+json.toString();
                            freeHastable =parsedata.coonectHttp(url,cat);
                            circularLoading = false;
                        }
                        if (freeHastable != null) {
                            Midlet.display.setCurrent(new WallPapersCanvas(2, "FREE GIFTS", freeHastable));
                        } else {
                            initializeError("MESSAGE", "COULD NOT POPULATE DATA FROM THE SERVER", MAIN_CATEGORIES);
                        }
                    } else {
                        initializeError("MESSAGE", "CATEGORY NAME DOES NOT EXIST", MAIN_CATEGORIES);
                    }
                } catch (Exception e) {
                    System.out.println("error @ getPreviewData");
                    e.printStackTrace();
                }
            }
        };
        th.start();
    }

1 个答案:

答案 0 :(得分:0)

当Java虚拟机尝试读取类文件并确定文件格式错误或无法解释为类文件时抛出。

Link  你能把你的代码放进去吗?