嗨嗨朋友我的代码中出现错误。我的项目成功编译＆amp;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();
}