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");// 设置窗体的标题comp = new BallComponent();add(comp, BorderLayout.CENTER);// 中间区域的布局约束JPanel buttonPanel = new JPanel();addButton(buttonPanel, "Start", event -> addBall());// 添加Start按钮addButton(buttonPanel, "Close", event -> System.exit(0));// 添加Close按钮add(buttonPanel, BorderLayout.SOUTH);// 南区域的布局约束pack();// 调整窗口大小
    }/*** 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);// 在指定的毫秒数内让当前正在执行的线程休眠
            }} catch (InterruptedException e) {}}
}

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();// 以 double 精度返回 Shape 窗体矩形的最小 X 坐标dx = -dx;}if (x + XSIZE >= bounds.getMaxX()) {x = bounds.getMaxX() - XSIZE;dx = -dx;}if (y < bounds.getMinY()) {y = bounds.getMinY();// 以 double 精度返回 Shape 窗体矩形的最小 Y 坐标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);// 根据指定坐标构造和初始化 Ellipse2D
    }
}

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);}
}

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");//设置标题
            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);//中间区域的布局约束JPanel buttonPanel = new JPanel();//创建具有双缓冲和流布局的新 JPanel。addButton(buttonPanel, "Start", event -> addBall());//添加Start按钮addButton(buttonPanel, "Close", event -> System.exit(0));//添加Close按钮add(buttonPanel, BorderLayout.SOUTH);//南区域的布局约束（容器底部）pack();//调整窗口的大小
    }/*** 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();//重绘组件Thread.sleep(DELAY);//在指定的毫秒数内让当前正在执行的线程休眠
                }} catch (InterruptedException e) {}};Thread t = new Thread(r);t.start();}
}

package bounceThread;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 directionif it hits one of the edges*/public void move(Rectangle2D bounds){x += dx;y += dy;if (x < bounds.getMinX()){ x = bounds.getMinX();//以 double 精度返回 Shape 窗体矩形的最小 X 坐标dx = -dx;}if (x + XSIZE >= bounds.getMaxX()){x = bounds.getMaxX() - XSIZE; dx = -dx; }if (y < bounds.getMinY()){y = bounds.getMinY(); //根据指定坐标构造和初始化 Ellipse2Ddy = -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);//根据指定坐标构造和初始化 Ellipse2D
   }
}

package bounceThread;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 JComponent {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 panel.* * @param b the ball to add*/public void add(Ball b) {balls.add(b);}public void paintComponent(Graphics g) {Graphics2D g2 = (Graphics2D) g;for (Ball b : balls) {g2.fill(b.getShape());}}public Dimension getPreferredSize() {return new Dimension(DEFAULT_WIDTH, DEFAULT_HEIGHT);//构造一个 Dimension，并将其初始化为指定宽度和高度。
    }
}

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());//返回对当前正在执行的线程对象的引用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;}
}

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;public static final double MAX_AMOUNT = 1000;public static final int DELAY = 10;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());double amount = MAX_AMOUNT * Math.random();bank.transfer(fromAccount, toAccount, amount);Thread.sleep((int) (DELAY * Math.random()));//在指定的毫秒数内让当前正在执行的线程休眠
                    }} catch (InterruptedException e) {}};Thread t = new Thread(r);//分配新的 Thread 对象t.start();//使该线程开始执行
        }}
}

import java.awt.EventQueue;import javax.swing.JFrame;public class Main {public static void main(String[] args) {EventQueue.invokeLater(() -> {DemoJFrame page = new 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();Dimension sSize = tkit.getScreenSize();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);}
}

import java.awt.*;
import javax.swing.*;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 read;public DemoJFrame() {// 设置窗口大小this.setSize(800, 400);// 设置可见性this.setVisible(true);// 设置标题this.setTitle("Students Detail");// 设置关闭操作this.setDefaultCloseOperation(EXIT_ON_CLOSE);// 设置窗口居中WinCenter.center(this);this.setLayout(new FlowLayout(FlowLayout.LEFT));// 创建四个面板对象jPanel1 = new JPanel();setJPanel1(jPanel1);jPanel2 = new JPanel();setJPanel2(jPanel2);jPanel3 = new JPanel();setJPanel3(jPanel3);jPanel4 = new JPanel();setJPanel4(jPanel4);// 设置容器的为流布局FlowLayout flowLayout = new FlowLayout();this.setLayout(flowLayout);// 将四个面板添加到容器中this.add(jPanel1);this.add(jPanel2);this.add(jPanel3);this.add(jPanel4);}/** 设置面一*/private void setJPanel1(JPanel jPanel) {// TODO 自动生成的方法存根jPanel.setPreferredSize(new Dimension(700, 45));// 给面板的布局设置为网格布局 一行4列jPanel.setLayout(new GridLayout(1, 4));JLabel name = new JLabel("Name:");fieldname = new JTextField("");JLabel study = new JLabel("Qualification:");comboBox = new JComboBox();comboBox.addItem("小学");comboBox.addItem("初中");comboBox.addItem("高中");comboBox.addItem("本科");jPanel.add(name);jPanel.add(fieldname);jPanel.add(study);jPanel.add(comboBox);this.add(jPanel);}/** 设置面板二*/private void setJPanel2(JPanel jPanel) {// TODO 自动生成的方法存根jPanel.setPreferredSize(new Dimension(700, 50));// 给面板的布局设置为网格布局 一行4列jPanel.setLayout(new GridLayout(1, 4));JLabel name = new JLabel("Adress:");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));read = new JCheckBox("Reading");sing = new JCheckBox("Singing");dance = new JCheckBox("Dancing");selectBox.add(read);selectBox.add(sing);selectBox.add(dance);jPanel.add(name);jPanel.add(fieldadress);jPanel.add(study);jPanel.add(selectBox);}/** 设置面板三*/private void setJPanel3(JPanel jPanel) {// TODO 自动生成的方法存根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("男");nv = new JRadioButton("女");bg.add(nan);bg.add(nv);selectBox.add(nan);selectBox.add(nv);jPanel.add(sex);jPanel.add(selectBox);}/** 设置面板四*/private void setJPanel4(JPanel jPanel) {// TODO 自动生成的方法存根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);}/** 提交数据*/private void valiData() {// TODO 自动生成的方法存根// 拿到数据String name = fieldname.getText().toString().trim();String qualification = comboBox.getSelectedItem().toString().trim();String address = fieldadress.getText().toString().trim();System.out.println("姓名： " + name);System.out.println("学历： " + qualification);System.out.println("地址： " + address);String hobbystring = "";if (read.isSelected()) {hobbystring += "Reading  ";}if (sing.isSelected()) {hobbystring += "Singing   ";}if (dance.isSelected()) {hobbystring += "Dancing  ";}System.out.println("爱好： " + hobbystring);if (nan.isSelected()) {System.out.println("性别：男");}if (nv.isSelected()) {System.out.println("性别：女");}}/** 重置*/private void Reset() {// TODO 自动生成的方法存根fieldadress.setText(null);fieldname.setText(null);comboBox.setSelectedIndex(0);sing.setSelected(false);dance.setSelected(false);read.setSelected(false);bg.clearSelection();}
}

class Lefthand implements Runnable {public void run() {for (int i = 1; i <= 5; i++) {System.out.println(i+"a.你好");try {Thread.sleep(500);} catch (InterruptedException e) {System.out.println("Lefthand error.");}}}}class Righthand implements Runnable {public void run() {for (int i = 1; i <= 5; i++) {System.out.println(i+"b.你好");try {Thread.sleep(300);} catch (InterruptedException e) {System.out.println("Righthand error.");}}}}public class ThreadTest {static Thread left;static Thread right;public static void main(String[] args) {Runnable a = new Lefthand();Runnable b = new Righthand();left = new Thread(a);right = new Thread(b);left.start();right.start();}
}