J2ME 实验复习指导Word格式文档下载.docx
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- 上传时间:2023-01-01
- 格式:DOCX
- 页数:64
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J2ME 实验复习指导Word格式文档下载.docx
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privateCommandOKCmd;
publicShortMessageMIDlet(){
display=Display.getDisplay(this);
//获取手机屏幕
//欢迎界面
welForm=newForm("
欢迎界面"
);
writeCmd=newCommand("
写短信"
Command.SCREEN,1);
exitCmd=newCommand("
退出"
Command.EXIT,1);
//编辑界面
editForm=newForm("
编辑界面"
editTxtField=newTextField("
短信内容:
"
"
255,TextField.ANY);
deleteCmd=newCommand("
删除"
Command.CANCEL,1);
backCmd=newCommand("
返回"
Command.BACK,1);
sendCmd=newCommand("
发送"
//发送界面
telForm=newForm("
发送界面"
telNumTxtField=newTextField("
对方号码:
16,TextField.NUMERIC);
OKCmd=newCommand("
确定"
Command.OK,1);
}
protectedvoidstartApp()throwsMIDletStateChangeException{
display.setCurrent(welForm);
welForm.append("
欢迎您使用自己开发的短信发送系统!
\n"
//在Form上添加汉字
try{
Imageimg=Image.createImage("
/logo.png"
ImageItemimgItem=newImageItem("
img,ImageItem.LAYOUT_CENTER,"
图片不能显示"
welForm.append(imgItem);
}catch(IOExceptione){
e.printStackTrace();
}
welForm.addCommand(exitCmd);
//将按钮添加到界面
welForm.addCommand(writeCmd);
welForm.setCommandListener(this);
//注册监听器
editTxtField.setPreferredSize(editForm.getWidth(),editForm.getHeight());
editForm.append(editTxtField);
editForm.setItemStateListener(this);
editForm.addCommand(backCmd);
editForm.addCommand(sendCmd);
editForm.setCommandListener(this);
//发送界面
telForm.append(telNumTxtField);
telForm.addCommand(OKCmd);
telForm.addCommand(backCmd);
telForm.setCommandListener(this);
protectedvoidpauseApp(){
protectedvoiddestroyApp(booleanarg0)throwsMIDletStateChangeException{
publicvoiditemStateChanged(Itemitem){
//System.out.println("
size:
="
+editTxtField.size());
//注意在点击”清除“的时候,其实调用的是commmandAction(),而没有触发这里的事件
if(item==editTxtField){
if(editTxtField.size()==1){
editForm.removeCommand(backCmd);
editForm.addCommand(deleteCmd);
}
publicvoidcommandAction(Commandc,Displayabled){
if(c==exitCmd){
try{
this.destroyApp(false);
}catch(MIDletStateChangeExceptione){
e.printStackTrace();
this.notifyDestroyed();
//退出
}elseif(c==writeCmd){
display.setCurrent(editForm);
}elseif(d==editForm&
&
c==backCmd){
display.setCurrent(welForm);
}elseif(c==deleteCmd){
intcurrPosition=editTxtField.getCaretPosition();
//获取光标当前位置
System.out.println("
position:
"
+currPosition);
if(currPosition>
0){
editTxtField.delete(currPosition-1,1);
}
if(currPosition==1){
editForm.removeCommand(deleteCmd);
editForm.addCommand(backCmd);
}elseif(c==sendCmd){
display.setCurrent(telForm);
}elseif(d==telForm&
}elseif(c==OKCmd){
telForm.append("
短信已发送!
Stringcontent=editTxtField.getString();
StringtelNum=telNumTxtField.getString();
+content);
+telNum);
}
2.J2ME低级界面开发技术和低级事件处理机制编写实现小球在界面上的运动功能。
packagecom.software.test;
importjavax.microedition.lcdui.Canvas;
importjavax.microedition.lcdui.Graphics;
publicclassAutoMoveImgDemoextendsMIDletimplementsCommandListener{
privateAutoCanvascanvas;
privateCommandpauseCmd;
privateCommandresumeCmd;
publicAutoMoveImgDemo(){
canvas=newAutoCanvas();
pauseCmd=newCommand("
暂停"
resumeCmd=newCommand("
继续"
//TODOAuto-generatedmethodstub
display.setCurrent(canvas);
canvas.addCommand(pauseCmd);
canvas.setCommandListener(this);
Threadt=newThread(canvas);
t.start();
if(c==pauseCmd){
canvas.pause();
canvas.removeCommand(pauseCmd);
canvas.addCommand(resumeCmd);
}elseif(c==resumeCmd){
canvas.resume();
canvas.removeCommand(resumeCmd);
canvas.addCommand(pauseCmd);
classAutoCanvasextendsCanvasimplementsRunnable{
privateintcurrentX;
privateintcurrentY;
privateintdir;
privateintr;
privatebooleanRUNING;
publicAutoCanvas(){
currentX=40;
currentY=40;
dir=1;
r=40;
RUNING=true;
protectedvoidpaint(Graphicsg){
g.setColor(255,255,255);
g.fillRect(0,0,this.getWidth(),this.getHeight());
g.setColor(255,0,0);
//设置画笔颜色为红色
//g.drawArc(currentX,currentY,r,r,0,360);
g.fillArc(currentX,currentY,r,r,0,360);
//画小球
protectedvoidkeyPressed(intkeyCode){
keyCode:
+keyCode);
intgameAction=this.getGameAction(keyCode);
if(gameAction==Canvas.LEFT){
currentX--;
if(gameAction==Canvas.RIGHT){
currentX++;
this.repaint();
protectedvoidkeyReleased(intkeyCode){
protectedvoidkeyRepeated(intkeyCode){
publicvoidresume(){
this.RUNING=true;
publicvoidpause(){
this.RUNING=false;
publicvoidrun(){
while(true){
if(RUNING){
//向上
if(dir==0){
if(currentY<
=0){
dir=1;
}else{
currentY--;
//r--;
}
}elseif(dir==1){
if(currentY+r>
this.getHeight()){
dir=0;
currentY++;
//r++;
}
this.repaint();
try{
Thread.sleep(50);
}catch(InterruptedExceptione){
e.printStackTrace();
3.
(1)RMS编程实现记录的增、删、改、查。
importjava.util.Date;
importjavax.microedition.rms.InvalidRecordIDException;
importjavax.microedition.rms.RecordStore;
importjavax.microedition.rms.RecordStoreException;
importjavax.microedition.rms.RecordStoreFullException;
importjavax.microedition.rms.RecordStoreNotFoundException;
importjavax.microedition.rms.RecordStoreNotOpenException;
publicclassRecordDemoextendsMIDlet{
publicRecordDemo(){
RecordStorers=null;
StringrsName="
testrs"
;
//打开
rs=RecordStore.openRecordStore(rsName,true);
}catch(RecordStoreFullExceptione){
}catch(RecordStoreNotFoundExceptione){
}catch(RecordStoreExceptione){
////添加数据
//intrecordId=0;
//try{
//Strings="
aaaaaaaa"
//byte[]data=s.getBytes();
//recordId=rs.addRecord(data,0,data.length);
//System.out.println("
添加的ID:
+recordId);
//}catch(RecordStoreNotOpenExceptione1){
//e1.printStackTrace();
//}catch(RecordStoreFullExceptione1){
//}catch(RecordStoreExceptione1){
//}
////获取记录内容
////byte[]data=rs.getRecord(recordId);
//intsize=rs.getRecordSize(recordId);
size:
+size);
//byte[]data=newbyte[size];
//intgetSize=rs.getRecord(recordId,data,0);
getsize:
读取数据:
+newString(data));
//}catch(InvalidRecordIDExceptione1){
////修改
//intrecordId=18;
////读取原内容
//byte[]data1=rs.getRecord(recordId);
修改前:
+newString(data1));
//
//byte[]newData="
bbbbb"
.getBytes();
//rs.setRecord(recordId,newData,0,newData.length);
////读取以验证
//byte[]dat
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