1、實(shí)驗(yàn)?zāi)康呐c要求

(1) 掌握線程概念；

(2) 掌握線程創(chuàng)建的兩種技術(shù)；

(3) 理解和掌握線程的優(yōu)先級(jí)屬性及調(diào)度方法；

(4) 掌握線程同步的概念及實(shí)現(xiàn)技術(shù)；

2、實(shí)驗(yàn)內(nèi)容和步驟

實(shí)驗(yàn)1：測(cè)試程序并進(jìn)行代碼注釋。

測(cè)試程序1：

l?在elipse IDE中調(diào)試運(yùn)行ThreadTest，結(jié)合程序運(yùn)行結(jié)果理解程序；

l?掌握線程概念；

l?掌握用Thread的擴(kuò)展類(lèi)實(shí)現(xiàn)線程的方法；

利用Runnable接口改造程序，掌握用Runnable接口創(chuàng)建線程的方法。

class Lefthand extends Thread { public void run(){for(int i=0;i<=5;i++){ System.out.println("You are Students!");try{ sleep(500); }catch(InterruptedException e){ System.out.println("Lefthand error.");} } } } class Righthand extends Thread {public void run(){for(int i=0;i<=5;i++){ System.out.println("I am a Teacher!");try{ sleep(300); }catch(InterruptedException e){ System.out.println("Righthand error.");}}} } public class ThreadTest {static Lefthand left;static Righthand right;public static void main(String[] args){ left=new Lefthand();right=new Righthand();left.start();right.start();} } ThreadTest

利用Runnable接口改造程序，掌握用Runnable接口創(chuàng)建線程的方法

class Lefthand implements Runnable { public void run(){for(int i=0;i<=5;i++){ System.out.println("You are Students!");try{ Thread.sleep(500);//休眠500毫秒 }catch(InterruptedException e){ System.out.println("Lefthand error.");} } }} class Righthand implements Runnable {public void run(){for(int i=0;i<=5;i++){ System.out.println("I am a Teacher!");try{ Thread.sleep(300);//休眠300毫秒 }catch(InterruptedException e){ System.out.println("Righthand error.");}}}} public class ThreadTest {public static void main(String[] args){ Righthand righthand = new Righthand();//新建一個(gè)righthand對(duì)象Lefthand lefthand = new Lefthand();//新建一個(gè)lefthand對(duì)象Thread right = new Thread(righthand);//start方法在Thread類(lèi)中，新建Thread類(lèi) right.start();Thread left=new Thread(lefthand);left.start();} } Runnable接口

測(cè)試程序2：

l?在Elipse環(huán)境下調(diào)試教材625頁(yè)程序14-1、14-2 、14-3，結(jié)合程序運(yùn)行結(jié)果理解程序；

l?在Elipse環(huán)境下調(diào)試教材631頁(yè)程序14-4，結(jié)合程序運(yùn)行結(jié)果理解程序；

l?對(duì)比兩個(gè)程序，理解線程的概念和用途；

l?掌握線程創(chuàng)建的兩種技術(shù)。

package bounce;import java.awt.geom.*;/*** A ball that moves and bounces off the edges of a rectangle* @version 1.33 2007-05-17* @author Cay Horstmann*/ public class Ball {private static final int XSIZE = 15;private static final int YSIZE = 15;private double x = 0;private double y = 0;private double dx = 1;private double dy = 1;/*** Moves the ball to the next position, reversing direction if it hits one of the edges*/public void move(Rectangle2D bounds){x += dx;y += dy;if (x < bounds.getMinX()){x = bounds.getMinX();dx = -dx;}if (x + XSIZE >= bounds.getMaxX()){x = bounds.getMaxX() - XSIZE;dx = -dx;}if (y < bounds.getMinY()){y = bounds.getMinY();dy = -dy;}if (y + YSIZE >= bounds.getMaxY()){y = bounds.getMaxY() - YSIZE;dy = -dy;}}/*** Gets the shape of the ball at its current position.*/public Ellipse2D getShape(){return new Ellipse2D.Double(x, y, XSIZE, YSIZE);} } ball package bounce;import java.awt.*; import java.util.*; import javax.swing.*;/*** The component that draws the balls.* @version 1.34 2012-01-26* @author Cay Horstmann*/ public class BallComponent extends JPanel {private static final int DEFAULT_WIDTH = 450;private static final int DEFAULT_HEIGHT = 350;private java.util.List<Ball> balls = new ArrayList<>();/*** Add a ball to the component.* @param b the ball to add*/public void add(Ball b){balls.add(b);}public void paintComponent(Graphics g){super.paintComponent(g); // erase backgroundGraphics2D g2 = (Graphics2D) g;for (Ball b : balls){g2.fill(b.getShape());}}public Dimension getPreferredSize() { return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT); } } BallComponent package bounce;import java.awt.*; import java.awt.event.*; import javax.swing.*;/*** Shows an animated bouncing ball.* @version 1.34 2015-06-21* @author Cay Horstmann*/ public class Bounce {public static void main(String[] args){EventQueue.invokeLater(() -> {JFrame frame = new BounceFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});} }/*** The frame with ball component and buttons.*/ class BounceFrame extends JFrame {private BallComponent comp;public static final int STEPS = 1000;public static final int DELAY = 3;/*** Constructs the frame with the component for showing the bouncing ball and* Start and Close buttons*/public BounceFrame(){setTitle("Bounce");comp = new BallComponent();add(comp, BorderLayout.CENTER);JPanel buttonPanel = new JPanel();addButton(buttonPanel, "Start", event -> addBall());addButton(buttonPanel, "Close", event -> System.exit(0));add(buttonPanel, BorderLayout.SOUTH);pack();}/*** Adds a button to a container.* @param c the container* @param title the button title* @param listener the action listener for the button*/public void addButton(Container c, String title, ActionListener listener){JButton button = new JButton(title);c.add(button);button.addActionListener(listener);}/*** Adds a bouncing ball to the panel and makes it bounce 1,000 times.*/public void addBall(){try{Ball ball = new Ball();comp.add(ball);for (int i = 1; i <= STEPS; i++){ball.move(comp.getBounds());comp.paint(comp.getGraphics());Thread.sleep(DELAY);}}catch (InterruptedException e){}} } Bounce

package bounceThread;import java.awt.*; import java.awt.event.*;import javax.swing.*;/*** Shows animated bouncing balls.* @version 1.34 2015-06-21* @author Cay Horstmann*/ public class BounceThread {public static void main(String[] args){EventQueue.invokeLater(() -> {JFrame frame = new BounceFrame();frame.setTitle("BounceThread");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setVisible(true);});} }/*** The frame with panel and buttons.*/ class BounceFrame extends JFrame {private BallComponent comp;public static final int STEPS = 1000;public static final int DELAY = 5;/*** Constructs the frame with the component for showing the bouncing ball and* Start and Close buttons*/public BounceFrame(){comp = new BallComponent();add(comp, BorderLayout.CENTER);JPanel buttonPanel = new JPanel();addButton(buttonPanel, "Start", event -> addBall());addButton(buttonPanel, "Close", event -> System.exit(0));add(buttonPanel, BorderLayout.SOUTH);pack();}/*** Adds a button to a container.* @param c the container* @param title the button title* @param listener the action listener for the button*/public void addButton(Container c, String title, ActionListener listener){JButton button = new JButton(title);c.add(button);button.addActionListener(listener);}/*** Adds a bouncing ball to the canvas and starts a thread to make it bounce*/public void addBall(){Ball ball = new Ball();comp.add(ball);Runnable r = () -> { try{ for (int i = 1; i <= STEPS; i++){ball.move(comp.getBounds());comp.repaint();Thread.sleep(DELAY);}}catch (InterruptedException e){}};Thread t = new Thread(r);t.start();} } BounceThread

測(cè)試程序3：分析以下程序運(yùn)行結(jié)果并理解程序。

?

class Race extends Thread {public static void main(String args[]) {Race[] runner=new Race[4];for(int i=0;i<4;i++) runner[i]=new Race( );for(int i=0;i<4;i++) runner[i].start( );runner[1].setPriority(MIN_PRIORITY);runner[3].setPriority(MAX_PRIORITY);}public void run( ) {for(int i=0; i<1000000; i++);System.out.println(getName()+"線程的優(yōu)先級(jí)是"+getPriority()+"已計(jì)算完畢!");} } Race extends Thread

測(cè)試程序4

l?教材642頁(yè)程序模擬一個(gè)有若干賬戶(hù)的銀行，隨機(jī)地生成在這些賬戶(hù)之間轉(zhuǎn)移錢(qián)款的交易。每一個(gè)賬戶(hù)有一個(gè)線程。在每一筆交易中，會(huì)從線程所服務(wù)的賬戶(hù)中隨機(jī)轉(zhuǎn)移一定數(shù)目的錢(qián)款到另一個(gè)隨機(jī)賬戶(hù)。

l?在Elipse環(huán)境下調(diào)試教材642頁(yè)程序14-5、14-6，結(jié)合程序運(yùn)行結(jié)果理解程序；

package unsynch;/*** This program shows data corruption when multiple threads access a data structure.* @version 1.31 2015-06-21* @author Cay Horstmann*/ public class UnsynchBankTest {public static final int NACCOUNTS = 100;public static final double INITIAL_BALANCE = 1000;//期初余額public static final double MAX_AMOUNT = 1000;//最大數(shù)量public static final int DELAY = 10;//延時(shí)public static void main(String[] args){Bank bank = new Bank(NACCOUNTS, INITIAL_BALANCE);for (int i = 0; i < NACCOUNTS; i++){int fromAccount = i;Runnable r = () -> {try{while (true){int toAccount = (int) (bank.size() * Math.random());//生成隨機(jī)數(shù)double amount = MAX_AMOUNT * Math.random();bank.transfer(fromAccount, toAccount, amount);Thread.sleep((int) (DELAY * Math.random()));}}catch (InterruptedException e){} };Thread t = new Thread(r);t.start();}} } UnsynchBankTest package unsynch;import java.util.*;/*** A bank with a number of bank accounts.* @version 1.30 2004-08-01* @author Cay Horstmann*/ public class Bank {private final double[] accounts;/*** Constructs the bank.* @param n the number of accounts* @param initialBalance the initial balance for each account*/public Bank(int n, double initialBalance){accounts = new double[n];Arrays.fill(accounts, initialBalance);}/*** Transfers money from one account to another.* @param from the account to transfer from* @param to the account to transfer to* @param amount the amount to transfer*/public void transfer(int from, int to, double amount){if (accounts[from] < amount) return;System.out.print(Thread.currentThread());accounts[from] -= amount;System.out.printf(" %10.2f from %d to %d", amount, from, to);accounts[to] += amount;System.out.printf(" Total Balance: %10.2f%n", getTotalBalance());}/*** Gets the sum of all account balances.* @return the total balance*/public double getTotalBalance(){double sum = 0;for (double a : accounts)sum += a;return sum;}/*** Gets the number of accounts in the bank.* @return the number of accounts*/public int size(){return accounts.length;} } Bank

綜合編程練習(xí)

編程練習(xí)1

設(shè)計(jì)一個(gè)用戶(hù)信息采集程序，要求如下：

用戶(hù)信息輸入界面如下圖所示:

（1）?用戶(hù)點(diǎn)擊提交按鈕時(shí)，用戶(hù)輸入信息顯示控制臺(tái)界面；

（2）?用戶(hù)點(diǎn)擊重置按鈕后，清空用戶(hù)已輸入信息；

（3）?點(diǎn)擊窗口關(guān)閉，程序退出。

import java.awt.EventQueue;import javax.swing.JFrame;public class Mian {public static void main(String[] args) {EventQueue.invokeLater(() -> {DemoJFrame page = new DemoJFrame();});} } Mian import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.GridLayout; import java.awt.LayoutManager; import java.awt.Panel; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.io.BufferedReader; import java.io.File; import java.io.FileInputStream; import java.io.IOException; import java.io.InputStreamReader; import java.util.ArrayList; import java.util.Timer; import java.util.TimerTask;import javax.swing.BorderFactory; import javax.swing.ButtonGroup; import javax.swing.ButtonModel; import javax.swing.JButton; import javax.swing.JCheckBox; import javax.swing.JComboBox; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JRadioButton; import javax.swing.JTextField;public class DemoJFrame extends JFrame {private JPanel jPanel1;private JPanel jPanel2;private JPanel jPanel3;private JPanel jPanel4;private JTextField fieldname;private JComboBox comboBox;private JTextField fieldadress;private ButtonGroup bg;private JRadioButton nan;private JRadioButton nv;private JCheckBox sing;private JCheckBox dance;private JCheckBox draw;public DemoJFrame() {// 設(shè)置窗口大小this.setSize(800, 400);// 設(shè)置可見(jiàn)性this.setVisible(true);// 設(shè)置標(biāo)題this.setTitle("Student Detail");// 設(shè)置關(guān)閉操作this.setDefaultCloseOperation(EXIT_ON_CLOSE);// 設(shè)置窗口居中WinCenter.center(this);// 創(chuàng)建四個(gè)面板對(duì)象jPanel1 = new JPanel();setJPanel1(jPanel1);jPanel2 = new JPanel();setJPanel2(jPanel2);jPanel3 = new JPanel();setJPanel3(jPanel3);jPanel4 = new JPanel();setJPanel4(jPanel4);// 設(shè)置容器為流式布局FlowLayout flowLayout = new FlowLayout();this.setLayout(flowLayout);// 將四個(gè)面板添加到容器中this.add(jPanel1);this.add(jPanel2);this.add(jPanel3);this.add(jPanel4);}/** 設(shè)置面板一*/private void setJPanel1(JPanel jPanel) {jPanel.setPreferredSize(new Dimension(700, 45));//設(shè)置此組件的首選大小// 給面板的布局設(shè)置為網(wǎng)格布局 一行4列jPanel.setLayout(new GridLayout(1, 4));JLabel name = new JLabel("Name:");name.setSize(100, 50);fieldname = new JTextField("");fieldname.setSize(80, 20);JLabel study = new JLabel("Qualification:");comboBox = new JComboBox();comboBox.addItem("Graduate");comboBox.addItem("senior");comboBox.addItem("Undergraduate");jPanel.add(name);jPanel.add(fieldname);jPanel.add(study);jPanel.add(comboBox);}/** 設(shè)置面板二*/private void setJPanel2(JPanel jPanel) {jPanel.setPreferredSize(new Dimension(700, 50));// 給面板的布局設(shè)置為網(wǎng)格布局 一行4列jPanel.setLayout(new GridLayout(1, 4));JLabel name = new JLabel("Address:");fieldadress = new JTextField();fieldadress.setPreferredSize(new Dimension(150, 50));JLabel study = new JLabel("Hobby:");JPanel selectBox = new JPanel();selectBox.setBorder(BorderFactory.createTitledBorder(""));selectBox.setLayout(new GridLayout(3, 1));sing = new JCheckBox("Singing");dance = new JCheckBox("Dancing");draw = new JCheckBox("Reading");selectBox.add(sing);selectBox.add(dance);selectBox.add(draw);jPanel.add(name);jPanel.add(fieldadress);jPanel.add(study);jPanel.add(selectBox);}/** 設(shè)置面板三*/private void setJPanel3(JPanel jPanel) {jPanel.setPreferredSize(new Dimension(700, 150));FlowLayout flowLayout = new FlowLayout(FlowLayout.LEFT);jPanel.setLayout(flowLayout);JLabel sex = new JLabel("Sex:");JPanel selectBox = new JPanel();selectBox.setBorder(BorderFactory.createTitledBorder(""));selectBox.setLayout(new GridLayout(2, 1));bg = new ButtonGroup();nan = new JRadioButton("Male");nv = new JRadioButton("Female");bg.add(nan);bg.add(nv);selectBox.add(nan);selectBox.add(nv);jPanel.add(sex);jPanel.add(selectBox);}/** 設(shè)置面板四*/private void setJPanel4(JPanel jPanel) {// TODO 自動(dòng)生成的方法存根jPanel.setPreferredSize(new Dimension(700, 150));FlowLayout flowLayout = new FlowLayout(FlowLayout.CENTER, 50, 10);jPanel.setLayout(flowLayout);jPanel.setLayout(flowLayout);JButton sublite = new JButton("Validate");JButton reset = new JButton("Reset");sublite.addActionListener((e) -> valiData());reset.addActionListener((e) -> Reset());jPanel.add(sublite);jPanel.add(reset);}/** 提交數(shù)據(jù)*/private void valiData() {// 拿到數(shù)據(jù)String name = fieldname.getText().toString().trim();String xueli = comboBox.getSelectedItem().toString().trim();String address = fieldadress.getText().toString().trim();System.out.println(name);System.out.println(xueli);String hobbystring="";if (sing.isSelected()) {hobbystring+="Singing ";}if (dance.isSelected()) {hobbystring+="Dancing ";}if (draw.isSelected()) {hobbystring+="Reading ";}System.out.println(address);if (nan.isSelected()) {System.out.println("Male");}if (nv.isSelected()) {System.out.println("Female");}System.out.println(hobbystring);}/** 重置*/private void Reset() {fieldadress.setText(null);fieldname.setText(null);comboBox.setSelectedIndex(0);sing.setSelected(false);dance.setSelected(false);draw.setSelected(false);bg.clearSelection();} } DemoJFrame import java.awt.Dimension; import java.awt.Toolkit; import java.awt.Window;public class WinCenter {public static void center(Window win){Toolkit tkit = Toolkit.getDefaultToolkit();//獲取默認(rèn)工具包Dimension sSize = tkit.getScreenSize();//獲取屏幕的大小Dimension wSize = win.getSize();if(wSize.height > sSize.height){wSize.height = sSize.height;}if(wSize.width > sSize.width){wSize.width = sSize.width;}win.setLocation((sSize.width - wSize.width)/ 2, (sSize.height - wSize.height)/ 2);//將組件移到新的位置 } } WinCenter

2．創(chuàng)建兩個(gè)線程，每個(gè)線程按順序輸出5次“你好”，每個(gè)“你好”要標(biāo)明來(lái)自哪個(gè)線程及其順序號(hào)。

package shiyan2;public class xiancheng {static xian1 xian11;static xian2 xian22; public static void main(String[] args){ xian11=new xian1();xian22=new xian2(); //用start（）方法啟動(dòng)線程 xian11.start();xian22.start();} }class xian1 extends Thread { public void run(){for(int i=1;i<=5;i++){ System.out.println( i+ "你好"+" 來(lái)自線程1");try{ sleep(200); }catch(InterruptedException e) //異常{ System.out.println("Lefthand error.");} } } }class xian2 extends Thread {public void run(){for(int i=1;i<=5;i++){ System.out.println( i+ "你好"+" 來(lái)自線程2");try{ sleep(200); }catch(InterruptedException e)//異常捕獲{ System.out.println("Lefthand error.");} }}} xiancheng

3. 完善實(shí)驗(yàn)十五 GUI綜合編程練習(xí)程序。

實(shí)驗(yàn)總結(jié)

　　通過(guò)本周的學(xué)習(xí)我了解了線程的概念，并且了解了線程創(chuàng)建的兩種技術(shù)、線程的優(yōu)先級(jí)屬性及調(diào)度方法以及終止線程的方法，（1）用Thread類(lèi)的子類(lèi)創(chuàng)建線程（2）用Runnable()接口實(shí)現(xiàn)線程；理解了線程的優(yōu)先級(jí)屬性及調(diào)度方法和線程的七種狀態(tài)。但是這些知識(shí)掌握還不牢靠，需要課下多加練習(xí)。

轉(zhuǎn)載于:https://www.cnblogs.com/lcjcc/p/10126884.html

總結(jié)

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