2015/8/5/抢锁/线程/JFrame

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synchronized

简单线程

线程与JFrame的结合

synchronized

1.synchronized锁的对象一般为类的对象，不能用太简单的形式例如Integer和boolean，因为过于简单会导致锁错误
2.synchronized的方法锁的对象是：调用该方法的对象
3.为避免抢锁现象的发生，常用Object类中wait和notify方法

简单例子

这里写图片描述

package com.baidu.producer;public class Test {    public static void main(String[] args) {        Product product=new Product();        Thread producer=new Thread(new Producer(product));        Thread consumer=new Thread(new Consumer(product));        producer.start();        try {            Thread.sleep(500);        } catch (InterruptedException e1) {            e1.printStackTrace();        }        consumer.start();    }}package com.baidu.producer;public class Product {    private int num=0;    public int getNum() {        return num;    }    public void setNum(int num) {        this.num = num;    }    public synchronized void consumer () {  //锁的对象是：调用该方法的对象        System.out.println("消费者抢到了锁");        if (getNum() != 0) {                //如果有商品就消费            System.out.println("消费产品");            try {                           //消费耗时                Thread.sleep(2000);            } catch (InterruptedException e1) {                // TODO Auto-generated catch block                e1.printStackTrace();            }            setNum(0);                      //消费完成，将商品清零            /*             * 唤醒生产者之后，生产者和消费者又开始抢锁，因此为了保持先生产后消费             * 的逻辑理论，让消费者重新进入循环之后等待500ms让生产者抢到锁             */            notify();                       //唤醒等待的生产者        }    }    public synchronized void producer() {        System.out.println("生产者抢到了锁");        if (getNum()==0) {                   //判断有无商品，有就跳过，没有就执行            System.out.println("生产产品");            try {                            //生产耗时                Thread.sleep(3000);            } catch (InterruptedException e1) {                e1.printStackTrace();            }            setNum(1);                      //生产出了产品            try {                wait();                     //等待消费者消费            } catch (InterruptedException e) {                e.printStackTrace();            }        }    }}package com.baidu.producer;public class Producer implements Runnable{    Product pro;    public Producer(Product pro){        this.pro=pro;    }    @Override    public void run() {        while(true){            pro.producer();        }    }}package com.baidu.producer;public class Consumer implements Runnable {    Product pro;    public Consumer(Product pro) {        this.pro = pro;    }    @Override    public void run() {        while (true) {            try {                                //为了让生产者抢到锁，让消费者休息0.5s                Thread.sleep(500);            } catch (InterruptedException e1) {                e1.printStackTrace();            }            pro.consumer();        }    }}

线程的一般例子

1.线程公用的对象可以是数据也可以是端口
2.一般线程公用是一个类型的话，通常可以用构造方法来调用对象

package com.baidu.dialogue;import java.io.IOException;import java.net.Socket;import java.net.UnknownHostException;public class MyClient {    public static void main(String[] args) {        try {            System.out.println("客户端连接");            Socket socket=new Socket("192.168.0.113", 8080); //创建一个流套接字并将其连接到指定 IP 地址的指定端口号            Thread read=new Thread(new MyRead(socket));      //创建线程            Thread write=new Thread(new MyWrite(socket));    //创建线程            read.start();                                    //线程启动            write.start();        } catch (UnknownHostException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}package com.baidu.dialogue;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;public class MyServer {    public static void main(String[] args) {        try {            System.out.println("服务端启动");            ServerSocket server=new ServerSocket(8080);  //创建绑定到特定端口的服务器套接字            Socket socket=server.accept();               //侦听并接受到此套接字的连接            Thread read=new Thread(new MyRead(socket));  //创建线程            Thread write=new Thread(new MyWrite(socket));//执行接收和写入端口的操作            read.start();            write.start();                               //线程启动        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}package com.baidu.dialogue;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.net.Socket;public class MyRead implements Runnable {    private Socket socket;    public MyRead(Socket socket) {        this.socket = socket;    }    @Override    public void run() {        BufferedReader br=null;        try {            InputStream is = socket.getInputStream();            br = new BufferedReader(new InputStreamReader(is));        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        while (true) {            try {                String line=br.readLine();                System.out.println("嘿嘿"+line);            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}package com.baidu.dialogue;import java.io.BufferedWriter;import java.io.IOException;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.Socket;import java.util.Scanner;public class MyWrite implements Runnable{    private Socket socket;    public MyWrite(Socket socket) {        this.socket = socket;    }    @Override    public void run() {        BufferedWriter bw=null;        try {            OutputStream os=socket.getOutputStream();            bw=new BufferedWriter(new OutputStreamWriter(os));        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        Scanner scanner=new Scanner(System.in);        while(true){            String words=scanner.next();            try {                bw.write(words+"\n");                bw.flush();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }        }    }}

JFrame

1.先在电脑上装上WindowsBuilder插件
这里写图片描述

package com.baidu.imSwing;import java.awt.BorderLayout;import java.awt.EventQueue;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.JButton;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.ServerSocket;import java.net.Socket;import java.awt.event.ActionEvent;import javax.swing.JTextField;import javax.swing.JTextArea;public class MyServer extends JFrame {    private JPanel contentPane;    private Socket socket;    private JTextArea textArea;    /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    MyServer frame = new MyServer();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public MyServer() {        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setBounds(100, 100, 451, 445);        contentPane = new JPanel();        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));        setContentPane(contentPane);        contentPane.setLayout(null);        JButton btnNewButton = new JButton("启动服务");        btnNewButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                try {                    System.out.println("服务器启动");                    ServerSocket server=new ServerSocket(8080);               //创建服务端，监听8080端口                    socket=server.accept();                                   //侦听并接受到此套接字的连接                    System.out.println("有连接进入服务器");                    Thread myRead=new Thread(new MyServerRead(MyServer.this));//创建新的线程对象，作用是接收发送过来的数据                    myRead.start();                                           //启动线程                } catch (IOException e1) {                    e1.printStackTrace();                }            }        });        btnNewButton.setBounds(27, 10, 243, 70);        contentPane.add(btnNewButton);        JButton btnNewButton_1 = new JButton("发送");        btnNewButton_1.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent arg0) {                write();                                                    //调用write方法，点击button就发送数据            }        });        btnNewButton_1.setBounds(306, 340, 93, 57);        contentPane.add(btnNewButton_1);        textArea= new JTextArea();        textArea.setBounds(27, 340, 243, 57);        contentPane.add(textArea);    }    public void read(){        try {            InputStream is=socket.getInputStream();                         //创建一个输入流            BufferedReader br=new BufferedReader(new InputStreamReader(is));//创建一个输入缓冲区域缓冲字符流            String line=br.readLine();                                      //读一行文本            System.out.println("客户端："+line);        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    public void write(){        OutputStream os;        try {            os = socket.getOutputStream();                                  //创建一个输出流            BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(os));//创建一个有输出缓冲区的输出字符流            String words=textArea.getText();                                //从文本框中得到文本放入words中//          System.out.println("服务端输出");            bw.write(words+"\n");                                           //将得到的文本写入包中发送出去                textArea.setText("");                                           //清空文本            bw.flush();                                                     //冲刷        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }}package com.baidu.imSwing;import java.awt.BorderLayout;import java.awt.EventQueue;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.border.EmptyBorder;import javax.swing.DefaultListModel;import javax.swing.JButton;import java.awt.event.ActionListener;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStream;import java.io.InputStreamReader;import java.io.OutputStream;import java.io.OutputStreamWriter;import java.net.Socket;import java.net.UnknownHostException;import java.awt.event.ActionEvent;import javax.swing.JTextArea;import javax.swing.JList;public class MyClient extends JFrame {    private JPanel contentPane;    private Socket socket;    private DefaultListModel<String> modle;    private JTextArea textArea;    private JList list;    /**     * Launch the application.     */    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    MyClient frame = new MyClient();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    /**     * Create the frame.     */    public MyClient() {        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setBounds(100, 100, 450, 558);        contentPane = new JPanel();        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));        setContentPane(contentPane);        contentPane.setLayout(null);        JButton btnNewButton = new JButton("发送");        btnNewButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                write();                                                      //调用write()方法，点击一次按钮就发送一次            }        });        btnNewButton.setBounds(311, 458, 113, 52);        contentPane.add(btnNewButton);        textArea= new JTextArea();        textArea.setBounds(21, 458, 260, 52);        contentPane.add(textArea);        list = new JList();        list.setBounds(21, 44, 260, 386);        modle=new DefaultListModel<>();        list.setModel(modle);        contentPane.add(list);        JButton btnNewButton_1 = new JButton("连接服务器");        btnNewButton_1.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                try {                    System.out.println("客户端启动");                    socket=new Socket("192.168.0.113", 8080);                 //创建一个流套接字并将其连接到指定 IP 地址的指定端口号                    Thread myRead=new Thread(new MyClientRead(MyClient.this));//创建新的线程对象，作用是接收发送过来的数据                    myRead.start();                                           //启动线程                } catch (UnknownHostException e1) {                    // TODO Auto-generated catch block                    e1.printStackTrace();                } catch (IOException e1) {                    // TODO Auto-generated catch block                    e1.printStackTrace();                }            }        });        btnNewButton_1.setBounds(311, 41, 113, 52);        contentPane.add(btnNewButton_1);    }    public void read(){        try {            InputStream is=socket.getInputStream();                         //创建以个输入流            BufferedReader br=new BufferedReader(new InputStreamReader(is));//创建一个输入缓冲区域            String line=br.readLine();                                      //读一行文本，放到字符line中            modle.addElement("服务器说"+line);                              //将line放入modle中即对话列表中            System.out.println(line);                                       //输出文本line        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }    }    public void write(){        OutputStream os;        try {            os = socket.getOutputStream();                                   //构建一个输出流            BufferedWriter bw=new BufferedWriter(new OutputStreamWriter(os));//创建一个输出缓冲区域            String words=textArea.getText();                                 //从输入文本框中得到文本放入words中            bw.write(words+"\n");                                            //将words写入包中发送            modle.addElement("客户端说"+words);                                  //将words放入modle中即对话列表中            textArea.setText("");                                            //清空文字            bw.flush();                                                      //冲刷        } catch (IOException e) {            e.printStackTrace();        }    }}package com.baidu.imSwing;public class MyClientRead implements Runnable{    private MyClient client;     public MyClientRead(MyClient client) {        this.client=client;    }    @Override    public void run() {        while(true){            client.read();        }    }}package com.baidu.imSwing;public class MyServerRead implements Runnable{    private MyServer server;                //创建类型为MyServer的属性    public MyServerRead(MyServer server) {        this.server=server;    }    @Override    public void run() {        while(true){            server.read();                  //调用read方法        }    }}

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