《Java 程序設(shè)計(jì)》課后答案下 崔志磊 曾海 吳道君

《Java程序設(shè)計(jì)》課后答案作者：崔志磊曾海吳道君任務(wù)29任務(wù)實(shí)訓(xùn)1、importjava.util.Set;importjava.util.TreeSet;classPhonesxaimplementsComparable{ Stringname; //品牌 intxl; //銷量 publicPhonesxa(Stringn,inti){ xl=i; name=n; } publicStringtoString(){ return"品牌:"+name+"\t銷量:"+xl+"萬"; } @Override publicintcompareTo(Objectarg0){ //TODOAuto-generatedmethodstub Phonesxaother=(Phonesxa)arg0; if(this.xl>other.xl){ return1; } elseif(this.xl<other.xl){ return-1; }else return0; }}publicclassApp29_sxa{ /** *@paramargs */ publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstub Set<Phonesxa>setl=newTreeSet<Phonesxa>(); setl.add(newPhonesxa("華為",85)); setl.add(newPhonesxa("小米",68)); setl.add(newPhonesxa("蘋果",75)); setl.add(newPhonesxa("華為",85)); for(Phonesxae:setl){ System.out.println(e); } }}任務(wù)實(shí)訓(xùn)2、importjava.util.Comparator;importjava.util.Set;importjava.util.TreeSet;classStudsxb{ Stringname; intscore; publicStudsxb(Stringn,intcj){ name=n; score=cj; } publicStringtoString(){ returnname+"\t"+score; }}classStudScoreCompimplementsComparator<Studsxb>{ publicintcompare(Studsxbarg0,Studsxbarg1){ if(arg0.score<arg1.score){return1;} elseif(arg0.score>arg1.score){return-1;} elsereturn0; }}publicclassApp29_sxb{ publicstaticvoidmain(String[]args){ Set<Studsxb>setl=newTreeSet<Studsxb>(newStudScoreComp()); //說明2 setl.add(newStudsxb("端木",85)); setl.add(newStudsxb("歐陽",68)); setl.add(newStudsxb("上官",75)); setl.add(newStudsxb("司馬",90)); System.out.println("姓名\tJava"); for(Studsxbe:setl){ System.out.println(e); } }}習(xí)題選擇題1、(D)。任務(wù)30任務(wù)實(shí)訓(xùn)1、importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassApp30_sxaextendsJFrameimplementsActionListener{ //窗口類 Image[]img=newImage[10]; String[]str={"gz1.jpg","gz2.jpg","gz3.jpg","gz4.jpg","gz5.jpg", "gz6.jpg","gz7.jpg","gz8.jpg","gz9.jpg","gz10.jpg"}; JButtonbt=newJButton("慢放"); staticintptr=0,x=1000; Containerc=getContentPane(); staticXclxc; publicApp30_sxa(){ setSize(500,460); setLocation(400,200); bt.setBounds(200,500,50,50); bt.addActionListener(this); c.add(bt,BorderLayout.SOUTH); for(inti=0;i<10;i++){ img[i]=Toolkit.getDefaultToolkit().getImage("圖片/"+str[i]); } setVisible(true); } publicvoidpaint(Graphicsg){ super.paint(g); g.drawImage(img[ptr%10],0,20,this); } publicvoidGetptr(inta){ //用于從線程類獲得圖片編號(hào)a ptr=a; } publicvoidactionPerformed(ActionEvente){ if(e.getSource()==bt){ x+=500; } xc.Getx(x); //使線程類獲得x的增值 } publicstaticvoidmain(String[]args){ App30_sxahd=newApp30_sxa(); xc=newXcl(hd); //構(gòu)建線程對(duì)象 xc.start(); //啟動(dòng)線程 }}classXclextendsThread{ //自定義線程類 intptr=0,x=500; App30_sxah; publicXcl(App30_sxaa){ h=a; } publicvoidGetx(inta){ x=a; } publicvoidrun(){ for(;;){ ptr++; h.Getptr(ptr); try{ Thread.sleep(x); h.repaint(); }catch(InterruptedExceptione){ } } }}任務(wù)實(shí)訓(xùn)2、importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassApp30_sxbextendsJFrame{ //畫圓 Containerc=getContentPane(); booleanbol=true; inta=100,b=100; publicApp30_sxb(){ setSize(300,300);setLocation(400,10);newThread(newRunnable(){ publicvoidrun(){ for(;;){ if(a<=250){a+=3;b+=3;} elsebreak; try{ Thread.sleep(500); repaint(); } catch(InterruptedExceptione){} } } }).start();setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setVisible(true); } publicvoidpaint(Graphicsg){ super.paint(g); g.drawOval(15,35,a,b); } publicstaticvoidmain(String[]args){ App30_sxbhda=newApp30_sxb(); hfybhdb=newhfyb(); }}classhfybextendsJFrame{ //畫矩形 Containerc=getContentPane(); booleanbol=true; inta=100,b=100; publichfyb(){ setSize(300,300);setLocation(50,10);newThread(newRunnable(){ publicvoidrun(){ for(;;){ if(a<=250){a+=3;b+=3;} try{ Thread.sleep(500); repaint(); } catch(InterruptedExceptione){} } } }).start();setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setVisible(true); } publicvoidpaint(Graphicsg){ super.paint(g); g.setColor(Color.red); g.drawRect(15,35,a,b); }}習(xí)題一、填空題1、Thread。2、Runnable。3、 CPU資源 。二、選擇題1、(A)。2、(C)。任務(wù)31任務(wù)實(shí)訓(xùn)1、publicclassApp31_sxa{Match[]t=newMatch[9];publicApp31_sxa(){ for(inti=0;i<9;i++){ t[i]=newMatch(); t[i].setName(""+i); }}classMatchextendsThread{ intw=100; publicvoidrun(){ while(w>0){ intx=Integer.parseInt(Thread.currentThread().getName()); w--; System.out.println(x+"位置："+w);; /*try{ //可以不用 sleep(100); } catch(InterruptedExceptione){return;}*/ } System.out.println(getName()+"\t線程到達(dá)終點(diǎn)了"); } } publicstaticvoidmain(String[]args){ App31_sxaa=newApp31_sxa(); for(inti=0;i<9;i++){ a.t[i].start(); } }}實(shí)訓(xùn)任務(wù)2、publicclassApp31_sxb{ Match[]ta=newMatch[9]; Thread[]t=newThread[9]; Booleanflag=true; publicApp31_sxb(){ for(inti=0;i<9;i++){ ta[i]=newMatch(); t[i]=newThread(ta[i]); t[i].setName(""+i); } } classMatchimplementsRunnable{ //接口實(shí)現(xiàn) intw=100; publicvoidrun(){ while(flag){ intx=Integer.parseInt(Thread.currentThread().getName()); w--; System.out.println(x+"位置："+w); if(w==0){ flag=false; //結(jié)束比賽 System.out.println(Thread.currentThread().getName() +"線程到達(dá)終點(diǎn)了比賽結(jié)束"); } try{ Thread.sleep(100); }catch(InterruptedExceptione){return;} } } } publicstaticvoidmain(String[]args){ App31_sxba=newApp31_sxb(); for(inti=0;i<9;i++){ a.t[i].start(); } }}習(xí)題一、填空題1、 創(chuàng)建 、 就緒、睡眠、 運(yùn)行消亡。2、就緒。3、 運(yùn)行 。二、選擇題1、(C)。2、(A)。任務(wù)32任務(wù)實(shí)訓(xùn)1、classTicket{ privatestaticinttickets=10; //總火車票 publicvoidSell(){ //統(tǒng)計(jì)剩余車票 synchronized(this){ System.out.println(Thread.currentThread().getName()+":賣出了第8車，第" +tickets+"座"); tickets=tickets-1; } }}classTicketOfficeextendsThread{ //售票點(diǎn) Ticketbk; publicTicketOffice(Tickets){ bk=s; } publicvoidrun(){ bk.Sell(); //售出票 try{ sleep(100); }catch(InterruptedExceptione){} }}publicclassApp32_sxa{ publicstaticvoidmain(String[]args){ Tickets=newTicket(); TicketOfficeoff=newTicketOffice(s); Thread[]thr=newThread[10]; //10個(gè)線程變量 for(inti=0;i<10;i++){ thr[i]=newThread(off); //創(chuàng)建線程 thr[i].setName("No"+(i+1)); //命名線程 thr[i].start(); //啟動(dòng)線程 } }}任務(wù)實(shí)訓(xùn)2、classTicket{ privatestaticinttickets=10; publicsynchronizedvoidSell(){ System.out.println(Thread.currentThread().getName()+":賣出了第8車，第" +tickets+"座"); tickets=tickets-1; }}classTicketOfficeextendsThread{ Ticketbk; publicTicketOffice(Tickets){ bk=s; } publicvoidrun(){ bk.Sell(); try{ sleep(100); }catch(InterruptedExceptione){} }}publicclassApp32_sxb{ publicstaticvoidmain(String[]args){ Tickets=newTicket(); TicketOfficeoff=newTicketOffice(s); Thread[]thr=newThread[10]; for(inti=0;i<10;i++){ thr[i]=newThread(off); thr[i].setName("No"+(i+1)); thr[i].start(); } }}習(xí)題一、填空題1、 同步方法 同步語句塊 。2、 類型 。3、 同步對(duì)象。二、選擇題1、(C)。2、(C)。任務(wù)33任務(wù)實(shí)訓(xùn)1、publicclassApp33_sxa{ publicstaticvoidmain(String[]args){ Transfert=newTransfer(); Originbox1=newOrigin(t); Goalbox3=newGoal(t); box1.start(); box3.start(); }}classOriginextendsThread{ //發(fā)球機(jī) publicTransferts; publicOrigin(Transferq){ts=q;} publicvoidrun(){ synchronized(ts){ //鎖定傳輸類對(duì)象 for(inti=1;i<7;i++){ ts.Getball(i); System.out.println("傳球機(jī)得到的球->"+Transfer.box); } } }}classGoalextendsThread{ //接球機(jī) publicTransferts; intx=0; publicGoal(Transferq){ts=q;} publicvoidrun(){ synchronized(ts){ //鎖定傳輸類對(duì)象 for(inti=1;i<7;i++){ x=ts.Putball(); //接球機(jī)得球 System.out.println("傳球機(jī)送出的球->"+Transfer.box); } } }}classTransfer{ //傳球機(jī) staticintbox=0; booleanbol=false; //協(xié)調(diào)Getball和Putball publicvoidGetball(intv){ while(bol==true){ try{ wait(); }catch(InterruptedExceptione){} } box=v; bol=true;notifyAll(); } publicintPutball(){ while(bol==false){ //bol內(nèi)無球就不接。等待 try{ wait(); }catch(InterruptedExceptione){} } bol=false;notifyAll(); //被喚醒或bol內(nèi)有球，便接球 returnbox; }}任務(wù)實(shí)訓(xùn)2、publicclassApp33_sxb{ publicstaticvoidmain(String[]args){ Transfert=newTransfer(); //定義傳球機(jī)對(duì)象變量與對(duì)象 Originbox1=newOrigin(t); //定義發(fā)球機(jī)對(duì)象變量與對(duì)象 Goalbox3=newGoal(t); //定義接球機(jī)對(duì)象變量與對(duì)象 box1.start(); //啟動(dòng)Origin線程 box3.start(); //啟動(dòng)Goal線程 }}classOriginextendsThread{ //發(fā)球機(jī) publicTransferts; publicOrigin(Transferq){ts=q;} publicvoidrun(){ for(inti=1;i<7;i++){ ts.Getball(i); } }}classGoalextendsThread{ //接球機(jī) publicTransferts; publicGoal(Transferq){ts=q;} publicvoidrun(){ for(inti=1;i<7;i++){ ts.Putball(); } }}classTransfer{ //傳球機(jī) staticintbox=0; //定義box數(shù)組中，準(zhǔn)備放球 booleanbol=false; //協(xié)調(diào)Getball和Putball publicsynchronizedvoidGetball(intv){ //發(fā)球，Getball是被同步的方法 while(bol==true){ try{ wait(); }catch(InterruptedExceptione){} } box=v;bol=true; System.out.println("傳球機(jī)得到的球->"+box); notifyAll(); } publicsynchronizedvoidPutball(){ //接球，Putball是被同步的方法 while(bol==false){ try{ wait(); }catch(InterruptedExceptione){} } bol=false; System.out.println("傳球機(jī)送出的球->"+box); notifyAll(); }}習(xí)題選擇題1、(D)。2、(C)。任務(wù)34任務(wù)實(shí)訓(xùn)1、importjava.awt.event.*;importjava.io.*;importjava.util.regex.Pattern;importpag23.App23_ss;publicclassApp25_sxaextendsApp23_ssimplementsActionListener{ FileWriterfw;…… @Override publicvoidactionPerformed(ActionEventarg0){ //TODOAuto-generatedmethodstub…… if(arg0.getSource()==bt){ //是"提交"按鈕…… if(ck.CheckMobile(stra)){ //驗(yàn)證手機(jī)是否合法 if(ck.CheckEmail(strb)){ //驗(yàn)證郵箱是否合法 ta.setText("提交成功"); //下面是文件部分 try{ //指定寫入文件，以追加的方式寫入 FileWriterfw=newFileWriter("文件/Registration.txt",true); fw.write("\r\n"); //寫入換行 fw.write(jtxm.getText()); //將姓名寫到文件中 fw.write('\t'); fw.write(stra); //將手機(jī)號(hào)寫到文件中 fw.write('\t'); fw.write(strb); //寫入Email fw.close(); }catch(IOExceptione){} //以上是文件部分 } …… }}任務(wù)實(shí)訓(xùn)2、importjava.awt.event.*;importjava.io.*;importjava.util.regex.Pattern;importpag23.App23_ss;publicclassApp25_sxaextendsApp23_ssimplementsActionListener{…… //省略部分同上 @Override publicvoidactionPerformed(ActionEventarg0){ //TODOAuto-generatedmethodstub…… //省略部分同上 if(arg0.getSource()==bt){ //是"提交"按鈕 char[]ch=newchar[1024]; intx; Stringstra=jta.getText(); Stringstrb=jtb.getText(); RegexTestck=newRegexTest(); if(ck.CheckMobile(stra)){ //驗(yàn)證手機(jī)是否合法 if(ck.CheckEmail(strb)){ //驗(yàn)證郵箱是否合法 try{ //指定讀入文件 FileReaderfd=newFileReader("文件/Registration.txt"); x=fd.read(ch); //按字符讀入，長度賦給x stra=newString(ch,0,x); //將char轉(zhuǎn)換為String }catch(FileNotFoundExceptione){} catch(IOExceptione){} if(stra.indexOf(jtxm.getText())==-1){ //驗(yàn)證是否有重名 ta.setText("提交成功"); try{ //在指定文件的尾部寫入 FileWriterfw=newFileWriter("文件/Registration.txt",true); fw.write("\r\n"); //寫入換行 fw.write(jtxm.getText());//寫入姓名 fw.write('\t'); fw.write(stra); //寫入手機(jī)號(hào) fw.write('\t'); fw.write(strb); //寫入Email fw.close(); }catch(IOExceptione){} } else ta.setText("有重名不能提交"); } else ta.setText("Email格式出錯(cuò)"); } else ta.setText("手機(jī)號(hào)格式出錯(cuò)"); } }}習(xí)題一、填空題1、 字符 。2、 "\r\n"。3、"\\" "/"。二、選擇題1、(A)任務(wù)35任務(wù)實(shí)訓(xùn)1、importjava.awt.*;importjava.awt.event.*;importjava.io.*;importjavax.swing.*;publicclassApp35_sxaextendsJFrameimplementsActionListener{Containerc=getContentPane();JButtonbt=newJButton("查看");JTextAreatf=newJTextArea();JScrollPanejsp=newJScrollPane(tf);inti=0; //簽名者編號(hào)Stringstra,strb;publicApp35_sxa(){setSize(400,200);c.add(jsp);tf.setBounds(160,130,90,20);c.add(bt,BorderLayout.SOUTH);bt.addActionListener(this);setVisible(true);}@Override publicvoidactionPerformed(ActionEventarg0){ //TODOAuto-generatedmethodstub stra=""; tf.setText(null); try{ FileReaderfr=newFileReader("文件/sig.txt"); BufferedReaderbfr=newBufferedReader(fr); while((strb=bfr.readLine())!=null){ stra+=stra+strb+"\n"; } tf.setText(stra); fr.close(); } catch(IOExceptione1){} } publicstaticvoidmain(String[]arguments){App35_sxahead=newApp35_sxa();}}任務(wù)實(shí)訓(xùn)2、importjava.awt.*;importjava.awt.event.*;importjava.io.*;importjavax.swing.*;publicclassApp35_sxbextendsJFrameimplementsActionListener{ Containerc=getContentPane(); JButtonbta=newJButton("查看"); JButtonbtb=newJButton("清除"); JTextAreatf=newJTextArea(); JPanelpan=newJPanel(); JScrollPanejsp=newJScrollPane(tf); inti=0; //簽名者編號(hào) Stringstra,strb; publicApp35_sxb(){ setSize(400,200); c.add(jsp);// tf.setBounds(160,130,90,20); pan.add(bta); pan.add(btb); c.add(pan,BorderLayout.SOUTH); bta.addActionListener(this); btb.addActionListener(this); setVisible(true); } @Override publicvoidactionPerformed(ActionEventarg0){ //TODOAuto-generatedmethodstub stra=""; tf.setText(null); if(arg0.getSource()==bta){ try{ FileReaderfr=newFileReader("文件/sig.txt"); BufferedReaderbfr=newBufferedReader(fr); while((strb=bfr.readLine())!=null){ stra+=stra+strb+"\n"; } tf.setText(stra); fr.close(); }catch(IOExceptione1){} } if(arg0.getSource()==btb){ FileWriterfw; //Writer使用也可 i++; try{ fw=newFileWriter("文件/sig.txt"); //指定目標(biāo)文件寫入 fw.write(""); //寫入文件 fw.close(); } catch(IOExceptione){} } } publicstaticvoidmain(String[]arguments){ App35_sxbhead=newApp35_sxb(); }}習(xí)題一、填空題1、 flush() 。2、 Data Calendar 。3、 定義對(duì)象 獲得或設(shè)定 。4、 Reader 。二、選擇題1、(D)。任務(wù)36任務(wù)實(shí)訓(xùn)1、importjava.io.FileInputStream;importjava.io.FileOutputStream;importjava.io.IOException;publicclassApp36_sxa{ publicstaticvoidmain(String[]args)throwsIOException{ FileInputStreamfin=newFileInputStream("文件/z.rar"); //打開源文件，讀 FileOutputStreamfout=newFileOutputStream("文件/w.rar"); //打開目標(biāo)文件，寫 System.out.println("filesize="+fin.available()); //輸出文件大小 byte[]ba=newbyte[1]; while(fin.read(ba)!=-1){ fout.write(ba); } System.out.println("filecopyedsuccess"); fin.close(); fout.close();}}任務(wù)實(shí)訓(xùn)2、importjava.io.*;publicclassApp36_sxb{ charlineSep=System.getProperty("line.separator").charAt(0);//得到一個(gè)行結(jié)尾 String[]products={"黃魚","大米","雞蛋","牛肉"}; double[]prices={180,5.6,17,56.3}; int[]units=newint[]{1,8,3,5}; Stringname="職工食堂"; publicvoidJsqdOutput()throwsIOException{ FileOutputStreamfout=newFileOutputStream("文件"+File.separator +"Data.txt"); //帶擴(kuò)展名 DataOutputStreamDataOut=newDataOutputStream(fout); DataOut.writeChars(name); //寫入姓名 DataOut.writeChar(lineSep); //寫入換行 for(inti=0;i<products.length;i++){ DataOut.writeChars(products[i]); //寫入產(chǎn)品名稱 DataOut.writeChar('\t'); //寫一個(gè)空格 } DataOut.writeChar(lineSep); //寫入換行 for(inti=0;i<prices.length;i++){ DataOut.writeDouble(prices[i]); //寫入價(jià)格 } for(inti=0;i<prices.length;i++){ DataOut.writeInt(units[i]); //寫入食品數(shù)量 } fout.close(); DataOut.close(); } publicvoidJsqdInput()throwsIOException{ FileInputStreamfin=newFileInputStream("文件\\Data.txt"); DataInputStreamDataIn=newDataInputStream(fin); StringBuffertheName=newStringBuffer(); StringBufferproduct=newStringBuffer(); doubletot=0; charchr; while(DataIn.available()>0){ while((chr=DataIn.readChar())!=lineSep) theName.append(chr); System.out.println("公司："+theName); System.out.print("\t"); while((chr=DataIn.readChar())!=lineSep){ product.append(chr); } System.out.println(product); System.out.print("價(jià)格\t"); for(inti=0;i<prices.length;i++){ prices[i]=DataIn.readDouble(); System.out.print(prices[i]+"\t"); } System.out.println(); System.out.print("數(shù)量\t"); for(inti=0;i<prices.length;i++){ units[i]=DataIn.readInt(); System.out.print(units[i]+"\t"); } System.out.println(); System.out.print("貨款\t"); for(inti=0;i<prices.length;i++){ System.out.print(prices[i]*units[i]+"\t"); tot=tot+prices[i]*units[i]; } System.out.print("\n合計(jì)\t"); System.out.println(tot); } DataIn.close(); } publicstaticvoidmain(String[]args)throwsIOException{ App36_sxbfrm=newApp36_sxb(); try{ frm.JsqdOutput(); frm.JsqdInput(); } catch(IOExceptione){} }}習(xí)題一、填空題1、 只讀 。2、 讀取 寫入 。二、選擇題1、(B)。任務(wù)37實(shí)訓(xùn)任務(wù)1、importjava.awt.*;importjava.awt.event.*;importjava.io.*;importjavax.swing.*;classStudentimplementsSerializable{ Stringstr; publicvoidSaveDatas(App37_sxasd){ //定義序列化方法 str=sd.textArea.getText().trim(); } publicvoidLoadDatas(App37_sxatar){ //定義反序列化。 tar.textArea.setText(str);//將該對(duì)象中的內(nèi)容加載到tar的對(duì)象中 }}classApp37_sxaextendsJFrame{ JLabellab=newJLabel("學(xué)號(hào)姓名年齡電話"); JButtonbt1=newJButton("儲(chǔ)存當(dāng)前的信息"),bt2=newJButton("讀出保存的信息"); StudentslObj; JTextAreatextArea=newJTextArea(); publicApp37_sxa(){ setSize(400,200); setTitle("任務(wù)實(shí)訓(xùn)A"); Containerc=this.getContentPane(); c.setLayout(null); bt1.setBounds(250,100,130,28); bt2.setBounds(250,50,130,28); lab.setBounds(13,10,150,40); textArea.setBounds(13,50,222,90); c.add(lab); c.add(bt1); c.add(bt2); c.add(textArea); bt1.addActionListener(newActionListener(){ //按鈕事件處理 publicvoidactionPerformed(ActionEvente){ bt1_actionPerformed(e); //進(jìn)入序列化 } }); bt2.addActionListener(newActionListener(){ //按鈕事件處理 publicvoidactionPerformed(ActionEvente){ bt2_actionPerformed(e);//進(jìn)入反序列化 } }); setVisible(true); } voidbt1_actionPerformed(ActionEvente){ //保存對(duì)象的狀態(tài) try{ FileOutputStreamtar=newFileOutputStream("data.ser"); ObjectOutputStreamouts=newObjectOutputStream(tar); slObj=newStudent(); slObj.SaveDatas(this); outs.writeObject(slObj); outs.flush(); outs.close(); }catch(IOExceptiona){ System.out.println(a); } } voidbt2_actionPerformed(ActionEvente){ //恢復(fù)對(duì)象的狀態(tài) try{ FileInputStreamsour=newFileInputStream("data.ser"); ObjectInputStreamins=newObjectInputStream(sour); slObj=(Student)ins.readObject(); ins.close(); }catch(IOExceptionb){ System.out.println(b); }catch(ClassNotFoundExceptionecp){ } if(slObj!=null) slObj.LoadDatas(this); } publicstaticvoidmain(Stringargs[]){ App37_sxamainFrame=newApp37_sxa(); }}實(shí)訓(xùn)任務(wù)2、importjava.awt.*;importjava.awt.event.*;importjava.io.*;importjava.util.StringTokenizer; importjavax.swing.*;classStudentimplementsSerializable{ intID; //學(xué)號(hào) Stringname; //姓名 intage; //年齡 Stringtelephone; //電話 Stringstr; publicvoidSaveDatas(App37_sxbsd){ //定義序列化方法 Stringid,na,ag,tel; str=sd.textArea.getText().trim(); StringTokenizerst=newStringTokenizer(str); id=st.nextToken(); na=st.nextToken(); ag=st.nextToken(); tel=st.nextToken(); ID=Integer.parseInt(id); name=na; age=Integer.parseInt(ag); telephone=tel; } publicvoidLoadDatas(App37_sxbtar){ //定義反序列化。 tar.tfa.setText(""+ID); tar.tfb.setText(name); tar.tfc.setText(""+age); tar.tfd.setText(telephone); str=tar.slObj.ID+""+tar.slO+""+tar.slObj.age +""+tar.slObj.telephone; tar.textArea.setText(str); //將該對(duì)象中的內(nèi)容加載到tar的對(duì)象中 }}classApp37_sxbextendsJFrame{ JLabellab=newJLabel("學(xué)號(hào)姓名年齡電話"); JLabellaba=newJLabel("學(xué)號(hào)"); JTextFieldtfa=newJTextField(); JLabellabb=newJLabel("姓名"); JTextFieldtfb=newJTextField(); JLabellabc=newJLabel("年齡"); JTextFieldtfc=newJTextField(); JLabellabd=newJLabel("電話"); JTextFieldtfd=newJTextField(); JButtonbt1=newJButton("儲(chǔ)存留言"),bt2=newJButton("讀出留言"); StudentslObj=newStudent(); JTextAreatextArea=newJTextArea(); publicApp37_sxb(){ setSize(400,300); setTitle("任務(wù)實(shí)訓(xùn)B"); Containerc=this.getContentPane(); c.setLayout(null); bt1.setBounds(250,100,130,28); bt2.setBounds(250,50,130,28); lab.setBounds(13,10,150,40); textArea.setBounds(13,50,222,90); c.add(lab); c.add(bt1); c.add(bt2); c.add(textArea); laba.setBounds(13,160,50,20); tfa.setBounds(50,160,60,20); c.add(laba); c.add(tfa); labb.setBounds(140,160,50,20); tfb.setBounds(180,160,90,20); c.add(labb); c.add(tfb); labc.setBounds(13,210,50,20); tfc.setBounds(50,210,60,20); c.add(labc); c.add(tfc); labd.setBounds(140,210,50,20); tfd.setBounds(180,210,90,20); c.add(labd); c.add(tfd); bt1.addActionListener(newActionListener(){ //按鈕事件處理,序列化 publicvoidactionPerformed(ActionEvente){ slObjFun(); //序列化方法 } }); bt2.addActionListener(newActionListener(){ //按鈕事件處理 publicvoidactionPerformed(ActionEvente){ antislObjFun(); //反序列化方法 } }); setVisible(true); } voidslObjFun(){ //定義序列化方法 try{ FileOutputStreamtar=newFileOutputStream("文件/myObj.j"); ObjectOutputStreamouts=newObjectOutputStream(tar); slObj.SaveDatas(this); outs.writeObject(slObj); //執(zhí)行序列化寫出 outs.flush(); outs.close(); }catch(IOExceptionecp){ } } voidantislObjFun(){ //定義反序列化方法 try{ FileInputStreamsour=newFileInputStream("文件/myObj.j"); ObjectInputStreamins=newObjectInputStream(sour); //指定數(shù)據(jù)從sour中讀 slObj=(Student)ins.readObject(); //得到對(duì)象并轉(zhuǎn)換 ins.close(); }catch(IOExceptionecp){ }catch(ClassNotFoundExceptionecp){ } if(slObj!=null) slObj.LoadDatas(this);//為對(duì)象裝入數(shù)據(jù) } publicstaticvoidmain(String[]args){ App37_sxbframe1=newApp37_sxb(); }}習(xí)題一、填空題1、 對(duì)象序列化 。2、二、選擇題1、(D)。任務(wù)38任務(wù)實(shí)訓(xùn)1、importjava.awt.*;importjava.awt.event.*;importjavax.swing.JFrame;publicclassApp38_sxaextendsJFrameimplementsMouseMotionListener{ intfx,fy,tx,ty; //出發(fā)點(diǎn)和終點(diǎn) Graphics2Dg2; publicApp38_sxa(){ Containerc=getContentPane(); c.setLayout(null); setSize(500,400); c.setBackground(Color.cyan); addMouseMotionListener(this); setVisible(true); } publicvoidmouseMoved(MouseEvente){ fx=e.getX(); fy=e.getY(); //決定首次畫的起點(diǎn) } publicvoidmouseDragged(MouseEvente){ tx=e.getX(); ty=e.getY(); //拖到點(diǎn)為終點(diǎn) Graphicsg=getGraphics(); g2=(Graphics2D)g; g2.setColor(Color.red); //設(shè)置筆色 g2.setStroke(newBasicStroke(3.0f)); //設(shè)置筆寬，它是Graphics2D的方法 g2.drawLine(fx,fy,tx,ty); fx=tx; fy=ty; //終點(diǎn)為新的起點(diǎn) } publicstaticvoidmain(String[]args){ App38_sxaframe=newApp38_sxa(); }}任務(wù)實(shí)訓(xùn)2、繪制多邊形importjava.awt.*;importjavax.swing.*;importpag22.App22_ss;importpag40.*;importjava.awt.event.*;publicclassApp38_tzextendsApp22_ssimplementsActionListener{ …… //省略部分同App38_tz publicApp38_tz(){ …… jbd.addActionListener(this); } @Override publicvoidactionPerformed(ActionEvente){ //TODOAuto-generatedmethodstub …… if(bol){ …… if(e.getSource()==jbd) key=3; …… } if(!bol){ …… if(e.getSource()==jbd) key=7; …… }…… } classMydpanelextendsJPanel{ publicvoidpaint(Graphicsg){…… int[]px={300,350,400}; int[]py={150,50,150}; switch(key){…… case3: g.setColor(Color.pink); g.drawPolygon(px,py,3); break;…… case7: g2.setColor(Color.cyan); g2.fill3DRect(300,100,70,50,true); break;…… } } }}習(xí)題一、填空題1、 左上角 右 下 。2、 面板 、 窗口 Canvas類對(duì)象 。二、選擇題1、(D)。任務(wù)39任務(wù)實(shí)訓(xùn)1、importjava.awt.*;importjavax.swing.*;publicclassApp39_sxaextendsJFrame{ Mypanelmp=newMypanel(); Containerc=getContentPane(); publicApp39_sxa(){ setSize(900,700); c.add(mp); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } publicstaticvoidmain(String[]args){App39_sxaframe=newApp39_sxa();}}classMypanelextendsJPanel{ Imageimage; publicMypanel(){ image=Toolkit.getDefaultToolkit().getImage("圖片/fox.png"); } publicvoidpaint(Graphicsg){ Graphics2Dg2=(Graphics2D)g; g2.shear(1,0); //圖像底邊向右移動(dòng)一個(gè)y高度的像素 g2.drawImage(image,0,90,200,140,this); g2.shear(-1,0); //圖像底邊向左移動(dòng)一個(gè)y高度的像素 g2.drawImage(image,390,90,200,140,this); g2.shear(-1,0); g2.drawImage(image,790,90,200,140,this); g2.shear(1,0); g2.rotate(Math.toRadians(10)); //轉(zhuǎn)10度 g2.drawImage(image,400,200,200,140,this); g2.rotate(Math.toRadians(10)); //再轉(zhuǎn)10度 g2.drawImage(image,400,200,200,140,this); g2.rotate(Math.toRadians(10)); //又轉(zhuǎn)10度 g2.drawImage(image,400,200,200,140,this); }}任務(wù)實(shí)訓(xùn)2、importjava.awt.*;importjava.awt.event.*;importjavax.swing.*;publicclassApp39_sxbextendsJFrameimplementsActionListener{//sxc Mypanelmp=newMypanel(); Containerc=getContentPane(); Timertim=newTimer(800,this); booleanbl=false; inta=1; publicApp39_sxb(){ setSize(800,368); c.add(mp); tim.start(); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setVisible(true); } publicstaticvoidmain(String[]args){ App39_sxbframe=newApp39_sxb(); } publicvoidactionPerformed(ActionEventarg0){ if(arg0.getSource()==tim){ if(bl==false){ a=-1; bl=true; }else{ a=1; bl=false; } Graphicsg=getGraphics(); paint(g); } } classMypanelextendsJPanel{ Imageimage; publicMypanel(){ image=Toolkit.getDefaultToolkit().getImage("圖片/fox.png"); } publicvoidpaint(Graphicsg){ Graphics2Dg2=(Graphics2D)g; g2.shear(a,0); if(bl==false) g2.drawImage(image,100,90,200,140,this); else g2.drawImage(image,550,90,200,140,this); } }}習(xí)題選擇題1、(C)。任務(wù)40任務(wù)實(shí)訓(xùn)1/*App40-sxa訪問時(shí)間服務(wù)器，端口8888*/publicclassSimTimeClient{publicstaticvoidmain(String[]argv){try{SockettimeSocket=newSocket("",8888); try{ InputStreamtimeStream=timeSocket.getInputStream(); OutputStreamtimeOutStream=timeSocket.getOutputStream(); PrintWriterpw=newPrintWriter(timeOutStream,true); Scannerinfo=newScanner(timeStream); StringinfoLine="Serversays:"+info.nextLine(); System.out.println(infoLine); System.out.println("Clientssays:TIME"); pw.println("TIME"); infoLine=info.nextLine(); System.out.println(infoLine); System.out.println("Clientssays:EXIT"); pw.println("EXIT"); infoLine=info.nextLine(); System.