mainui.java

操作系统课程实习之进程调度模拟实现--采用时间片轮转算法(JAVA版)

/**
 * MainUI类
 * 带main()入口方法
 * @author linpeitian
 */

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class MainUI extends JFrame implements ActionListener{
	
	/**
	 * UI组件
	 */
	public JButton confirm = null;  //接受进程数目及时间片大小确认按钮
	public JTextField processNumField = null; //输入进程数目域
	public JTextField timeField = null;       //输入时间片大小域
	
	public JTextField processNameField = null;   //输入进程名域
	public JTextField processStartField = null;  //输入进程开始时间域
	public JTextField processLenField = null;    //输入进程耗时域 
	
	public JButton reset = null;            //重置按钮
	public JButton submit = null;   //进程提交按钮
	public JButton runSubmit = null;       //进程调度运行按钮
	
	public JTextArea area = null;    //进程具体调度显示屏
	public JLabel timeSys = null;    //具体耗时显示
	public JLabel status = null;     //具体状态显示
	
	private JSeparator separator = null;
	
	/**
	 * 逻辑控制
	 */
	public int number = 0;           //进程数
	public int timeblock = 0;         //时间片
	public int threadNum = 0;
	public SubThread subThread[] = new SubThread[20]; //线程
	public MainThread mainThread = null;          //主线程
	
	/**
	 * 构造函数
	 * 主要负责图形界面的构建 
	 */
	public MainUI(){
		super("进程调度模拟");
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		
		//具体布局 GridBagLayout布局方式
		GridBagConstraints cst = null;
		GridBagLayout layout = new GridBagLayout();
		getContentPane().setLayout(layout);
		
		confirm = new JButton("确定");
		confirm.addActionListener(this);
		cst = new GridBagConstraints();
		cst.gridwidth = 1;
		cst.gridheight = 2;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(confirm, cst);
		getContentPane().add(confirm);
		
		JLabel processNumLabel = new JLabel("进程数目:");
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.CENTER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processNumLabel, cst);
		getContentPane().add(processNumLabel);
		
		processNumField = new JTextField(15);
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processNumField, cst);
		getContentPane().add(processNumField);
		
		JLabel timeLabel = new JLabel("时间片值:");
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.CENTER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(timeLabel, cst);
		getContentPane().add(timeLabel);
		
		timeField = new JTextField(15);
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(timeField, cst);
		getContentPane().add(timeField);
		
		separator = new JSeparator();
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(separator, cst);
		getContentPane().add(separator);
		
		JLabel processNameLabel = new JLabel("进程名称:");
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.EAST;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processNameLabel, cst);
		getContentPane().add(processNameLabel);
		
		processNameField = new JTextField();
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processNameField, cst);
		getContentPane().add(processNameField);
		
		JLabel processStartLabel = new JLabel("到达时间:");
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.EAST;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processStartLabel, cst);
		getContentPane().add(processStartLabel);
		
		processStartField = new JTextField();
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processStartField, cst);
		getContentPane().add(processStartField);
		
		JLabel processLenLabel = new JLabel("运行时间:");
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.EAST;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processLenLabel, cst);
		getContentPane().add(processLenLabel);
		
		processLenField = new JTextField();
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(processLenField, cst);
		getContentPane().add(processLenField);
		
		reset = new JButton("重置");
		reset.addActionListener(this);
		cst = new GridBagConstraints();
		cst.anchor = GridBagConstraints.EAST;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(reset, cst);
		getContentPane().add(reset);
		
		submit = new JButton("提交进程");
		submit.addActionListener(this);
		cst = new GridBagConstraints();
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(submit, cst);
		getContentPane().add(submit);
		
		runSubmit = new JButton("运行进程");
		runSubmit.addActionListener(this);
		cst = new GridBagConstraints();
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(runSubmit, cst);
		getContentPane().add(runSubmit);
		
		separator = new JSeparator();
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(separator, cst);
		getContentPane().add(separator);
		
		area = new JTextArea(10, 40);
		area.setEditable(false);
		cst = new GridBagConstraints();
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(area, cst);
		getContentPane().add(area);
		
		timeSys = new JLabel("");
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(timeSys, cst);
		getContentPane().add(timeSys);
		
		status = new JLabel("");
		cst = new GridBagConstraints();
		cst.fill = GridBagConstraints.HORIZONTAL;
		cst.gridwidth = GridBagConstraints.REMAINDER;
		cst.insets = new Insets(5, 5, 5, 5);
		layout.setConstraints(status, cst);
		getContentPane().add(status);
		
		setSize(550, 510);
		setResizable(false);
		setVisible(true);
		
		//复位操作
		resetDone();
	}
	
	/**
	 * ActionEvent 事件处理
	 */
	public void actionPerformed(ActionEvent e){
		Object oj = e.getSource();
		if(oj == confirm){
			//确认输入进程数以及时间片大小按钮事件
			if(processNumField.getText().trim().equals("")||timeField.getText().trim().equals("")){
				//输入为空处理
				JOptionPane.showMessageDialog(this,
						"请输入进程数目或者时间片为空!!",
						"出错",
						JOptionPane.ERROR_MESSAGE);
			}else{
				try{
					number = Integer.parseInt(processNumField.getText());
					timeblock = Integer.parseInt(timeField.getText());
					//逻辑合法性验证
					if(number <= 0 || number > 10){
						JOptionPane.showMessageDialog(this,
								"请输入进程数应该在1<=n<=10!!",
								"出错",
								JOptionPane.ERROR_MESSAGE);
					}else if(timeblock <= 0){
						JOptionPane.showMessageDialog(this,
								"请输入时间片大小应该t>=0!!",
								"出错",
								JOptionPane.ERROR_MESSAGE);
					}else{
						confirmDone();
						threadNum = 0;
					}
				}catch(NumberFormatException ee){
					//输入进程数以及时间片为空处理
					JOptionPane.showMessageDialog(this,
							"请输入进程数目或时间片大小格式有误",
							"出错",
							JOptionPane.ERROR_MESSAGE);
				}
			}
		}else if(oj == reset){
			//重置按钮事件
			resetDone();
		}else if(oj == submit){
			//提交进程按钮事件
			if(processNameField.getText().trim().equals("")||processStartField.getText().trim().equals("")||processLenField.getText().trim().equals("")){
				//输入为空状态处理
				JOptionPane.showMessageDialog(this,
						"输入进程信息有误，请验证!!",
						"出错",
						JOptionPane.ERROR_MESSAGE);
			}else{
				String pname = null;
				int start = 0;
				int len = 0;
				try{
					pname = processNameField.getText();
					start = Integer.parseInt(processStartField.getText());
					len = Integer.parseInt(processLenField.getText());
					if(start < 0 || len <= 0){
						//逻辑错误处理
						JOptionPane.showMessageDialog(this,
								"输入进程信息有误，可能存在负数!!",
								"出错",
								JOptionPane.ERROR_MESSAGE);
					}else{
						//合法,建立一个相应的线程来模拟进程
						subThread[threadNum] = new SubThread(pname, start, len);
						threadNum++;
						if(threadNum == number)
							submitDone();
						display();
						processNameField.setText("");
						processStartField.setText("");
						processLenField.setText("");
					}
				}catch(NumberFormatException ee){
					//输入信息非法情况处理
					JOptionPane.showMessageDialog(this,
							"输入进程信息格式错误!!",
							"出错",
							JOptionPane.ERROR_MESSAGE);
				}
			}
		}else if(oj == runSubmit){
			mainThread = new MainThread(this);
			mainThread.start();
			reset.setEnabled(false);
			runSubmit.setEnabled(false);
		}
	}
	
	/**
	 * submitDone()
	 * 相应submit按钮事件
	 */
	public void submitDone(){
		//窗口界面显示刷新
		processNameField.setText("");
		processNameField.setEditable(false);
		processStartField.setText("");
		processStartField.setEditable(false);
		processLenField.setText("");
		processLenField.setEditable(false);
		submit.setEnabled(false);
		runSubmit.setEnabled(true);
		status.setText("按重置按钮返回初始状态，按运行进程开始进程调度");
	}
	
	/**
	 * confirmDone()
	 * 相当于响应confirm按钮事件
	 */
	public void confirmDone(){
		//窗口界面显示刷新
		confirm.setEnabled(false);
		processNumField.setEditable(false);
		timeField.setEditable(false);
		processNameField.setText("");
		processNameField.setEditable(true);
		processStartField.setText("");
		processStartField.setEditable(true);
		processLenField.setText("");
		processLenField.setEditable(true);
		submit.setEnabled(true);
		status.setText("请输入各个进程的相关信息");
	}
	
	/**
	 * resetDone()
	 * 相当于激发reset按钮事件
	 */
	public void resetDone(){
		//窗口界面显示刷新
		confirm.setEnabled(true);
		processNumField.setText("");
		processNumField.setEditable(true);
		timeField.setText("");
		timeField.setEditable(true);
		processNameField.setText("");
		processNameField.setEditable(false);
		processStartField.setText("");
		processStartField.setEditable(false);
		processLenField.setText("");
		processLenField.setEditable(false);
		submit.setEnabled(false);
		runSubmit.setEnabled(false);
		timeSys.setText("第0秒");
		status.setText("请输入进程数目以及时间片大小");
		//释放资源
		for(int i = 0;i < number; i++)
			subThread[i] = null;
		number = 0;
		timeblock = 0;
		threadNum = 0;
		mainThread = null;
		//area显示线程状态信息
		display();
	}
	
	/**
	 * display()
	 * 相当于刷新area中的具体内容
	 */
	public void display(){
		//各个线程按到达时间的先后排序
		SubThread tmp = null;
		for(int i = 0; i < threadNum; i++){
			for(int j = i+1; j < threadNum; j++){
				if(subThread[i].start > subThread[j].start){
					tmp = subThread[i];
					subThread[i] = subThread[j];
					subThread[j] = tmp;
				}
			}
		}
		//刷新area中的具体内容
		area.setText("");
		area.setText("进程名字\t进程状态\t到达时间\tCPU时间\t已运行时间\n");
		for(int i = 0 ; i < threadNum; i++)
		area.append(subThread[i].getProcess() + "\t" 
				+ subThread[i].getStatus() + "\t"
				+ subThread[i].getStart() + "\t"
				+ subThread[i].getTime() + "\t"
				+ subThread[i].getRun() + "\n");
	}
	
	/**
	 * 程序入口方法main
	 * @param args
	 */
	public static void main(String[] args){
		JFrame.setDefaultLookAndFeelDecorated(true);
		JDialog.setDefaultLookAndFeelDecorated(true);
		new MainUI();
	}

}