《Java语言程序设计》Java中实现多线程有几种方式

《Java语言程序设计》Java中实现多线程有几种方式？第一套题一、简答题1什么是多态性?方法的重载和覆盖有何区别?阅读下列代码，指出其中存在的重载和覆盖，写出输出结果是什么？解释为什么这样输出?(15分)classC1{ publicvoidf(){ System.out.println("C1.f"); }}classC2extendsC1{ publicvoidf(){ System.out.println("C2.f"); }}classC3{ publicvoidg(C1one){ System.out.println("g(C1)"); one.f(); } publicvoidg(C2two){ System.out.println("g(C2)"); two.f(); }}publicclassMain1{ publicstaticvoidmain(String[]args){ C1one=newC2(); C3three=newC3(); three.g(one); }}(1)多态是同一个行为具有多个不同表现形式或形态的能力。(2)重载就是具有相同函数名，返回类型可以不同，参数个数、顺序、类型不同的函数覆盖就是父类的方法，和父类有相同返回类型，参数，甚至是抛出的异常输出：g(C1)C2.f第一个输出是C3方法publicvoidg(C1one)，C2.f是因为多态，C1one=newC2();第二个输出是C2的publicvoidf()方法。2、请用自己的语言介绍throw/throws有什么联系和区别？在程序中应如何使用？另外谈谈final、finally的区别和作用，必须举例说明用法。(15分)throw抛出一个异常。需要自己捕获，并进行相应处理。throws是声明方法中可能抛出的所有异常(在声明方法处表示该方法可能要抛出异常)，通常不显示的捕获异常，由系统自动将所有捕获的异常抛给上级方法；如：if(a!=b)

thrownewException3("自定义异常");

}publicvoidaaa(Stringa)throwsException1,Exception3{......}3、编写一个描述学生基本情况的类，属性包括姓名，学号，语文成绩，数学成绩和英语成绩，方法包括信息输出，设置姓名和学号，设置三门课程成绩，计算总成绩和平均成绩。在publicclassStudent11{publicstaticvoidmain(String[]args){Studentstudent=newStudent();student.setXingming("jack");student.setXuehao("3332233");student.setYuwen((float)60);student.setYingyu((float)40);student.setShuxue((float)100);System.out.println("姓名："+student.getXingming());System.out.println("学号："+student.getXuehao());System.out.println("语文："+student.getYuwen());System.out.println("数学："+student.getShuxue());System.out.println("英语："+student.getYingyu());System.out.println("总成绩："+student.zhongfen());System.out.println("平均："+student.pingjunfen());}staticclassStudent{privateStringxingming;privateStringxuehao;privatefloatyuwen;privatefloatshuxue;privatefloatyingyu;publicStringgetXingming(){returnxingming;}publicvoidsetXingming(Stringxingming){this.xingming=xingming;}publicStringgetXuehao(){returnxuehao;}publicvoidsetXuehao(Stringxuehao){this.xuehao=xuehao;}publicfloatgetYuwen(){returnyuwen;}publicvoidsetYuwen(floatyuwen){this.yuwen=yuwen;}publicfloatgetShuxue(){returnshuxue;}publicvoidsetShuxue(floatshuxue){this.shuxue=shuxue;}publicfloatgetYingyu(){returnyingyu;}publicvoidsetYingyu(floatyingyu){this.yingyu=yingyu;}publicfloatzhongfen(){returnyuwen+shuxue+shuxue;}publicfloatpingjunfen(){returnzhongfen()/3;}}}main方法中对方法进行测试(15分)4、Java中实现多线程有几种方式？这几种方式有什么区别？然后采取其中一种方式设计一个线程例子，在例子中构造4个线程对象实现对同一数据类对象进行操作(数据初始值为0)，其中线程对象1对数据执行+10的操作，线程对象2对数据执行+20的操作,对象3对数据执行乘以3的操作，线程对象4对数据执行除以4的操作,，要求考虑线程同步，保证数据操作的正确性。要求提供程序代码以及运行结果截图（15分)publicclassThreadTest{intnumber=0;publicstaticvoidmain(String[]args){ThreadTesttestThread=newThreadTest();newThread(newRunnableImpl1(testThread)).start();newThread(newRunnableImpl3(testThread)).start();newThread(newRunnableImpl2(testThread)).start();newThread(newRunnableImpl(testThread)).start();}publicvoidxiugai(intthreadType){synchronized(this){switch(threadType){case0:number=number+10;break;case1:number=number+20;break;case2:number=number*3;break;case3:number=number*4;break;default:break;}System.out.println(Thread.currentThread().getName()+"："+number);}}staticclassRunnableImplimplementsRunnable{privatefinalThreadTesttestThread;publicRunnableImpl(ThreadTesttestThread){this.testThread=testThread;}@Overridepublicvoidrun(){try{while(true){testThread.xiugai(3);sleep(1000);}}catch(InterruptedExceptionex){ex.printStackTrace();}}}staticclassRunnableImpl1implementsRunnable{privatefinalThreadTesttestThread;publicRunnableImpl1(ThreadTesttestThread){this.testThread=testThread;}@Overridepublicvoidrun(){try{while(true){testThread.xiugai(0);sleep(1000);}}catch(InterruptedExceptionex){ex.printStackTrace();}}}staticclassRunnableImpl2implementsRunnable{privatefinalThreadTesttestThread;publicRunnableImpl2(ThreadTesttestThread){this.testThread=testThread;}@Overridepublicvoidrun(){try{while(true){testThread.xiugai(2);sleep(1000);}}catch(InterruptedExceptionex){ex.printStackTrace();}}}staticclassRunnableImpl3implementsRunnable{privatefinalThreadTesttestThread;publicRunnableImpl3(ThreadTesttestThread){this.testThread=testThread;}@Overridepublicvoidrun(){try{while(true){testThread.xiugai(1);sleep(1000);}}catch(InterruptedExceptionex){ex.printStackTrace();}}}}二、编程题1、编写一个图形用户界面程序，包含两个按钮，一个信息标签（label）和一个显示面板，两个按钮分别为“掷色子”和“移动”，在显示面板中显示一个小人（用小圆以及线绘制），随机设定小人的初始位置，当点击“掷色子”按钮，随机产生移动信息（上移，下移，左移，右移，移动几步）,并显示在信息标签中，点击移动，按照产生的移动信息，让小人进行移动。要求提供完整程序代码以及运行结果截图（20分)publicclassmainextendsjavax.swing.JFrame{publicmain(){initComponents();}@SuppressWarnings("unchecked")//<editor-folddefaultstate="collapsed"desc="GeneratedCode">privatevoidinitComponents(){jButton1=newjavax.swing.JButton();jButton2=newjavax.swing.JButton();jLabel1=newjavax.swing.JLabel();setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);jButton1.setText("掷色子");jButton1.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jButton1ActionPerformed(evt);}});jButton2.setText("移动");jButton2.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jButton2ActionPerformed(evt);}});javax.swing.GroupLayoutlayout=newjavax.swing.GroupLayout(getContentPane());getContentPane().setLayout(layout);layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(javax.swing.GroupLayout.Alignment.TRAILING,layout.createSequentialGroup().addGap(42,42,42).addComponent(jButton2).addGap(43,43,43).addComponent(jLabel1,javax.swing.GroupLayout.PREFERRED_SIZE,95,javax.swing.GroupLayout.PREFERRED_SIZE).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED,53,Short.MAX_VALUE).addComponent(jButton1).addGap(41,41,41)));layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(layout.createSequentialGroup().addGap(31,31,31).addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE).addComponent(jButton1).addComponent(jButton2)).addComponent(jLabel1,javax.swing.GroupLayout.PREFERRED_SIZE,32,javax.swing.GroupLayout.PREFERRED_SIZE)).addContainerGap(237,Short.MAX_VALUE)));pack();}//</editor-fold>privatevoidjButton1ActionPerformed(java.awt.event.ActionEventevt){Randomrandom=newRandom();randomNum=random.nextInt(4)+1;randomPosition=random.nextInt(4);jLabel1.setText(strs[randomPosition]+randomNum+"步");}privatevoidjButton2ActionPerformed(java.awt.event.ActionEventevt){repaint();}publicstaticvoidmain(Stringargs[]){try{for(javax.swing.UIManager.LookAndFeelInfoinfo:javax.swing.UIManager.getInstalledLookAndFeels()){if("Nimbus".equals(info.getName())){javax.swing.UIManager.setLookAndFeel(info.getClassName());break;}}}catch(ClassNotFoundException|InstantiationException|IllegalAccessException|javax.swing.UnsupportedLookAndFeelExceptionex){java.util.logging.Logger.getLogger(main.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);}//</editor-fold>//</editor-fold>/*Createanddisplaytheform*/java.awt.EventQueue.invokeLater(newRunnableImpl());}@Overridepublicvoidpaint(Graphicsg){super.paint(g);switch(randomPosition){case0:y=y-randomNum*10;break;case1:y=y+randomNum*10;break;case2:x=x-randomNum*10;break;case3:x=x+randomNum*10;break;default:break;}g.drawRect(x,y,30,30);}intx=200;inty=200;intrandomNum=0;intrandomPosition=0;String[]strs={"上移","下移","左移","右移"};//Variablesdeclaration-donotmodifyprivatejavax.swing.JButtonjButton1;privatejavax.swing.JButtonjButton2;privatejavax.swing.JLabeljLabel1;//EndofvariablesdeclarationprivatestaticclassRunnableImplimplementsRunnable{publicRunnableImpl(){}@Overridepublicvoidrun(){newmain().setVisible(true);}}}2、编写一个班级推优（优秀学生干部）投票管理程序。列出参与推优的学生名单（6名），可以勾选进行投票，要求每个参选学生前面有图标表示候选人的职务，每人可以投3票，每次投票后能够显示当前投票人数以及每名候选者得票数，图形化柱状图显示得票数，可以保存投票结果到文本文件。要求提供完整程序代码以及运行结果截图(20分)/**Tochangethislicenseheader,chooseLicenseHeadersinProjectProperties.*Tochangethistemplatefile,chooseTools|Templates*andopenthetemplateintheeditor.*/packagetestjava;importjava.awt.BorderLayout;importjava.awt.Font;importjava.util.List;importjavax.swing.JCheckBox;importorg.jfree.chart.ChartFactory;importorg.jfree.chart.ChartPanel;importorg.jfree.chart.JFreeChart;importorg.jfree.chart.axis.CategoryAxis;importorg.jfree.chart.axis.NumberAxis;importorg.jfree.chart.axis.ValueAxis;importorg.jfree.chart.plot.CategoryPlot;importorg.jfree.chart.plot.PlotOrientation;importorg.jfree.data.category.CategoryDataset;importorg.jfree.data.category.DefaultCategoryDataset;/****@authorldl*/publicclassTestFr1extendsjavax.swing.JFrame{privatejavax.swing.JButtonjButton1;privatejavax.swing.JCheckBoxjCheckBox1;privatejavax.swing.JCheckBoxjCheckBox2;privatejavax.swing.JCheckBoxjCheckBox3;privatejavax.swing.JCheckBoxjCheckBox4;privatejavax.swing.JCheckBoxjCheckBox5;privatejavax.swing.JCheckBoxjCheckBox6;privatejavax.swing.JPaneljPanel1;/***CreatesnewformTestFr*/publicTestFr1(){initComponents();CategoryDatasetdataset=getDataSet();JFreeChartchart=ChartFactory.createBarChart("统计",//图表标题"投票统计",//目录轴的显示标签"数量",//数值轴的显示标签dataset,//数据集PlotOrientation.VERTICAL,//图表方向：水平、垂直true,false,false);CategoryPlotplot=chart.getCategoryPlot();//获取图表区域对象NumberAxisnumberaxis=(NumberAxis)plot.getRangeAxis();numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());CategoryAxisdomainAxis=plot.getDomainAxis();//水平底部列表domainAxis.setLabelFont(newFont("黑体",Font.BOLD,14));//水平底部标题domainAxis.setTickLabelFont(newFont("宋体",Font.BOLD,12));//垂直标题ValueAxisrangeAxis=plot.getRangeAxis();//获取柱状rangeAxis.setLabelFont(newFont("黑体",Font.BOLD,15));chart.getLegend().setItemFont(newFont("黑体",Font.BOLD,15));chart.getTitle().setFont(newFont("宋体",Font.BOLD,20));//设置标题字体ChartPanelchartPanel=newChartPanel(chart,true);jPanel1.setLayout(newBorderLayout(0,0));jPanel1.add(chartPanel);jPanel1.repaint();}/***Thismethodiscalledfromwithintheconstructortoinitializetheform.*WARNING:DoNOTmodifythiscode.Thecontentofthismethodisalways*regeneratedbytheFormEditor.*/@SuppressWarnings("unchecked")//<editor-folddefaultstate="collapsed"desc="GeneratedCode">//GEN-BEGIN:initComponentsprivatevoidinitComponents(){jCheckBox1=newjavax.swing.JCheckBox();jPanel1=newjavax.swing.JPanel();jCheckBox5=newjavax.swing.JCheckBox();jCheckBox2=newjavax.swing.JCheckBox();jCheckBox3=newjavax.swing.JCheckBox();jCheckBox6=newjavax.swing.JCheckBox();jCheckBox4=newjavax.swing.JCheckBox();jButton1=newjavax.swing.JButton();setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);jCheckBox1.setText("班长");jCheckBox1.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox1ActionPerformed(evt);}});javax.swing.GroupLayoutjPanel1Layout=newjavax.swing.GroupLayout(jPanel1);jPanel1.setLayout(jPanel1Layout);jPanel1Layout.setHorizontalGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,411,Short.MAX_VALUE));jPanel1Layout.setVerticalGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGap(0,0,Short.MAX_VALUE));jCheckBox5.setText("李4");jCheckBox5.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox5ActionPerformed(evt);}});jCheckBox2.setText("卫生1");jCheckBox2.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox2ActionPerformed(evt);}});jCheckBox3.setText("李2");jCheckBox3.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox3ActionPerformed(evt);}});jCheckBox6.setText("李5");jCheckBox6.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox6ActionPerformed(evt);}});jCheckBox4.setText("李3");jCheckBox4.addActionListener(newjava.awt.event.ActionListener(){publicvoidactionPerformed(java.awt.event.ActionEventevt){jCheckBox4ActionPerformed(evt);}});jButton1.setText("投票");javax.swing.GroupLayoutlayout=newjavax.swing.GroupLayout(getContentPane());getContentPane().setLayout(layout);layout.setHorizontalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(layout.createSequentialGroup().addContainerGap().addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addComponent(jCheckBox1).addComponent(jCheckBox2).addComponent(jCheckBox3).addComponent(jCheckBox4).addComponent(jCheckBox5).addComponent(jCheckBox6).addComponent(jButton1)).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED).addComponent(jPanel1,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,Short.MAX_VALUE)));layout.setVerticalGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING).addGroup(layout.createSequentialGroup().addGap(14,14,14).addComponent(jCheckBox1).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED).addComponent(jCheckBox2).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED).addComponent(jCheckBox3).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED).addComponent(jCheckBox4).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED).addComponent(jCheckBox5).addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED).addComponent(jCheckBox6).addGap(18,18,18).addComponent(jButton1).addContainerGap(83,Short.MAX_VALUE)).addComponent(jPanel1,javax.swing.GroupLayout.DEFAULT_SIZE,javax.swing.GroupLayout.DEFAULT_SIZE,Short.MAX_VALUE));pack();}//</editor-fold>//GEN-END:initComponents/***@paramargsthecommandlinearguments*/publicstaticvoidmain(Stringargs[]){/*SettheNimbuslookandfeel*///<editor-folddefaultstate="collapsed"desc="Lookandfeelsettingcode(optional)">/*IfNimbus(introducedinJavaSE6)isnotavailable,staywiththedefaultlookandfeel.*Fordetailssee/javase/tutorial/uiswing/lookandfeel/plaf.html*/try{for(javax.swing.UIManager.LookAndFeelInfoinfo:javax.swing.UIManager.getInstalledLookAndFeels()){if("Nimbus".equals(info.getName())){javax.swing.UIManager.setLookAndFeel(info.getClassName());break;}}}catch(ClassNotFoundExceptionex){java.util.logging.Logger.getLogger(TestFr.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);}catch(InstantiationExceptionex){java.util.logging.Logger.getLogger(TestFr.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);}catch(IllegalAccessExceptionex){java.util.logging.Logger.getLogger(TestFr.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);}catch(javax.swing.UnsupportedLookAndFeelExceptionex){java.util.logging.Logger.getLogger(TestFr.class.getName()).log(java.util.logging.Level.SEVERE,null,ex);}//</editor-fold>/*Createanddisplaytheform*/java.awt.EventQueue.invokeLater(newRunnable(){publicvoidrun(){newTestFr().setVisible(true);}});} privatevoidjCheckBox1ActionPerformed(java.awt.event.ActionEventevt){JCheckBoxjCheckBox=(JCheckBox)evt.getSource();intintValue=dataset.getValue(0,0).intValue();if(jCheckBox.isSelected()){intValue++;}else{intValue--;}dataset.setValue(intValue,"1","1");}privatevoidjCheckBox5ActionPerformed(java.awt.event.ActionEventevt){//TODOaddyourhandlingcodehere:JCheckBoxjCheckBox=(JCheckBox)evt.getSource();intintValue=dataset.getValue(4,4).intValue();if(jCheckBox.isSelected()){intValue++;}else{intValue--;}dataset.setValue(intValue,"4","4");}privatevoidjCheckBox2ActionPerformed(java.awt.event.Acti