企业网站需要在电信做哪些备案,北海购物网站开发设计,设计坞网站怎么样,华为公司的企业设计JAVA多线程程序ProgressBar 题目简介#xff1a; 思维导图#xff1a; 实验代码#xff1a;建议先看CalThread类#xff0c;计算线程的实现#xff0c;再作基本CalFrame类的界面#xff0c; 然后作ReadThread类#xff0c;结合CalFrame的组件#xff0c;最后完善CalFra…JAVA多线程程序ProgressBar 题目简介 思维导图 实验代码建议先看CalThread类计算线程的实现再作基本CalFrame类的界面 然后作ReadThread类结合CalFrame的组件最后完善CalFrame类 代码折叠 import java.awt.EventQueue;import javax.swing.JFrame;
import java.awt.BorderLayout;
import javax.swing.JLabel;
import java.awt.Font;
import javax.swing.SwingConstants;
import javax.swing.JPanel;
import java.awt.GridLayout;
import javax.swing.JTextArea;
import javax.swing.JProgressBar;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
/***author 李祖林*/
public class CalFrame implements ActionListener{private JFrame frame;JTextArea textA,textB;JProgressBar progressBar;JButton button;public CalFrame() {frame new JFrame();frame.setBounds(100, 100, 755, 300);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.getContentPane().setLayout(new BorderLayout(0, 0));JLabel label new JLabel(\u591A\u7EBF\u7A0B \u8BA1\u7B971!2!...12!);label.setHorizontalAlignment(SwingConstants.CENTER);label.setFont(new Font(宋体, Font.BOLD, 18));frame.getContentPane().add(label, BorderLayout.NORTH);JPanel panel new JPanel();frame.getContentPane().add(panel, BorderLayout.CENTER);panel.setLayout(new GridLayout(3, 2, 0, 0));JLabel label_1 new JLabel(\u8BA1\u7B97\u8FC7\u7A0B);label_1.setFont(new Font(宋体, Font.BOLD, 18));label_1.setHorizontalAlignment(SwingConstants.CENTER);panel.add(label_1);textA new JTextArea();textA.setFont(new Font(Courier New, Font.BOLD, 15));panel.add(textA);JLabel label_2 new JLabel(\u8FDB\u5EA6\u6761);label_2.setHorizontalAlignment(SwingConstants.CENTER);label_2.setFont(new Font(宋体, Font.BOLD, 18));panel.add(label_2);progressBar new JProgressBar();progressBar.setMaximum(12);panel.add(progressBar);JLabel label_3 new JLabel(\u8BA1\u7B97\u7ED3\u679C);label_3.setHorizontalAlignment(SwingConstants.CENTER);label_3.setFont(new Font(宋体, Font.BOLD, 18));panel.add(label_3);textB new JTextArea();textB.setFont(new Font(Courier New, Font.BOLD, 18));panel.add(textB);JPanel panel_1 new JPanel();frame.getContentPane().add(panel_1, BorderLayout.SOUTH);button new JButton(\u5F00\u59CB);button.setFont(new Font(宋体, Font.BOLD, 18));panel_1.add(button);button.addActionListener(this);frame.setVisible(true);}public void actionPerformed(ActionEvent e) {/*计算线程 自启动*/CalThread calThread new CalThread();/*读取线程*/ReadThread readThread new ReadThread(this); //此处的this是CalFrame类的对象Thread thread new Thread(readThread); //非自启动构造扩展线程类的对象通过Thread()传该类得以实现线程thread.start();}public static void main(String[] args) {CalFrame calFrame new CalFrame();}} CalFrame /*** author 李祖林**/
public class ReadThread extends Thread {/*成员变量*/CalFrame calFrame;/*有参与无参构造函数*/public ReadThread() {}public ReadThread(CalFrame calFrame) {this.calFrame calFrame;}/*线程开始读取*/public void run(){while(true){calFrame.textA.setText(CalThread.string); //计算过程calFrame.textB.setText(String.valueOf(CalThread.sum)); //计算结果calFrame.progressBar.setValue(CalThread.n); //计算进度try {Thread.sleep(100);} catch (InterruptedException e) { System.err.println(读取线程ReadThread发送错误);e.printStackTrace();}}}
} ReadThread /*** author 李祖林**/
public class CalThread extends Thread {static double sum 1; static String string 1!;static int n 1;Thread thread null;/*构造函数 自启动*/public CalThread() {thread new Thread(this);thread.start();}/*计算n!*/double fun(int n){double sum 1;for(int i 1;i n;i){sum * i;}return sum;}/*线程开始计算*/public void run(){while(n12){n; //进度条进度sum fun(n); //计算结果string string n !; //计算过程try {Thread.sleep((int)Math.random()*600 300); //随机300-900毫秒} catch (InterruptedException e) {System.err.println(计算线程CalThread出现错误);e.printStackTrace();}}}} CalThread 实验结果 转载于:https://www.cnblogs.com/jdemarryme/p/7070216.html
