project1.java

操作系统中

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


public class project1										
{
	public static void main(String []args)						//entry of the program
	{
		proframe frame=new proframe();
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.show();											//show the frame
	}
}

class  proframe extends JFrame									//main frame
{
	public proframe()
	{
		this.setSize(850,500);									//set size and property
		this.setLocation(100,100);
		this.setTitle("Scheduling ");
		
		Container contentpanel=this.getContentPane();


		 r_panel=new radiopanel();
		 d_panel=new demonstration(r_panel);
		 p_panel=new processpanel(d_panel);
		 v_panel=new versionpanel();				

		
		 
		int i;
		int []temp=new int[4];
		for(i=0;i<4;i++)
			temp[i]=p_panel.get_value(i);
			
		d_panel.set_burst(temp);
		
	

		contentpanel.add(r_panel,"West");						//add radio panel
	
		contentpanel.add(p_panel,"East");						//add process slider panel
		
		contentpanel.add(v_panel,"South");						//add version panel

			
		contentpanel.add(d_panel,"Center");						//add demonstration panel
		
		
		
	}
	
	private radiopanel r_panel;
	private demonstration d_panel;
	private processpanel p_panel;
	private versionpanel v_panel;
	
}


class demonstration extends JPanel 
{
	public demonstration(int burst[],radiopanel r_panel)
	{
			int i;
			for(i=0;i<4;i++)
				this.burst[i]=burst[i];
			
			this.create_textfield();
			this.r_panel=r_panel;
			
	}
	
	public demonstration(radiopanel r_panel)
	{
			int i;
			for(i=0;i<4;i++)
				this.burst[i]=0;
		this.create_textfield();
		this.r_panel=r_panel;
		
		
	}
	
	public void create_textfield()
	{
			this.ave_turnaround.setEditable(false);
			this.ave_waiting.setEditable(false);	
			
			Box hbox1=Box.createHorizontalBox();
			hbox1.add(new JLabel("ave turnaround  "));
			hbox1.add(this.ave_turnaround);
			
			Box hbox2=Box.createHorizontalBox();
			hbox2.add(new JLabel("ave waiting      "));
			hbox2.add(this.ave_waiting);
			
			Box vbox=Box.createVerticalBox();
			vbox.add(hbox1);
			vbox.add(Box.createVerticalStrut(5));
			vbox.add(hbox2);
			
			this.add(vbox);
			
	}
	public void set_burst(int i,int value)
	{
		this.burst[i]=value;
		repaint();
	}
	public void set_burst(int burst[])
	{
			int i;
			for(i=0;i<4;i++)
				this.burst[i]=burst[i];
				
			repaint();
			
	}
	
	public void paintComponent(Graphics g)
	{
		super.paintComponent(g);
		Graphics2D g2=(Graphics2D)g;
		
		Rectangle2D rect=new Rectangle2D.Double();
		int i;
		for(i=0;i<4;i++)
		{
			rect.setFrame(LEFT_X+HOR_OFFSET*i,TOP_Y,WIDTH,this.burst[i]*BASE);		
			g2.draw(rect);
		}
	
		if(ready)			
		{
			for(i=0;i<4;i++)
			{
				rect.setFrame(LEFT_X+HOR_OFFSET*i,TOP_Y,WIDTH,(this.burst[i]-process[i].getTime())*BASE);		
				g2.setPaint(Color.GREEN);
				g2.fill(rect);
		//	this.setfield();	
			}
			
		}
	}
	
	

	public boolean get_ready()
	{
		return this.ready;
	}
	public void areyouready()
	{
		this.ready=!ready;	
		if(ready)
		{
			q=new Queue(10);
			int i;		
			for(i=0;i<4;i++) 
			{
				process[i]=new proc(this.burst[i],"process"+Integer.toString(i));
				q.enqueue(process[i]);
			}
					
			cpuobj=new cpu(q,this,this.r_panel);
			cpuobj.start();
		}
			
	}

  public void setfield()
  {
  	this.ave_turnaround.setText(Double.toString(cpuobj.get_ave_turnaround()));
	this.ave_waiting.setText(Double.toString(cpuobj.get_ave_waiting()));
	validate();
	
  }


	
	private int []burst=new int[4];
	private boolean ready=false;
	public static final int LEFT_X=100;
	public static final int TOP_Y=100;
	public static final int WIDTH=20;
	public static final int HOR_OFFSET=50;
	public static final int BASE=3;
	
	
	private radiopanel r_panel;


	private Queue q;
	private proc process[]=new proc[4];
	cpu cpuobj;
	
	
	private JTextField ave_turnaround=new JTextField("0",10);
	private JTextField ave_waiting=new JTextField("0",10);
	
}


























class versionpanel extends JPanel								//version panel
{
	public versionpanel()
	{
//		Border b=BorderFactory.createEtchedBorder(Color.BLUE,Color.RED);
//		this.setBorder(b);
	
		add(new JLabel("Made by jiangjun"),"East");
	}
	

}















class radiopanel extends JPanel										//radio panel
{
	public radiopanel()
	{
		
		Border b=BorderFactory.createEtchedBorder(Color.BLUE,Color.RED);
		this.setBorder(b);
		
		roundrobin=new JRadioButton("round robin",false);
		fifo=new JRadioButton("fifo",false);
		sjf=new JRadioButton("sjf",false);
		
		roundrobin.addActionListener(new algorithm_listener());
		fifo.addActionListener(new algorithm_listener());
		sjf.addActionListener(new algorithm_listener());
		
	
	
		 Box hbox1=Box.createVerticalBox();
		 hbox1.add(roundrobin);
		 hbox1.add(fifo);
		 hbox1.add(sjf);
		 
		group =new ButtonGroup();
		
		group.add(roundrobin);
		group.add(fifo);
		group.add(sjf);
		
		
		add(hbox1);
	
	}
		
	private class algorithm_listener implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			JRadioButton source=(JRadioButton)event.getSource();
			//source.getText();		
			JOptionPane.showMessageDialog(null,source.getText());
			algorithm=source.getText();
			
			
		}
	}	
				
	public void judge_button()
	{
		if(algorithm.equals("round robin"))
			choice=ROUNDROBIN;
		else if(algorithm.equals("fifo"))
			choice=FIFO;
		else if(algorithm.equals("sjf"))
			choice=SJF;
	}
	
	
	public int get_choice()
	{
		judge_button();
	//	JOptionPane.showMessageDialog(null,Integer.toString(choice));
		return this.choice;
	}
	private JRadioButton roundrobin;
	private JRadioButton fifo;
	private JRadioButton sjf;
	private ButtonGroup group;
	
	private String algorithm="";
	private int choice=-1;
	
	public static final int ROUNDROBIN=0;
	public static final int FIFO=1;
	public static final int SJF=2;	

	
}






class processpanel extends JPanel						//slider panel
{
	public processpanel(demonstration d_panel)
	{
		
		this.d_panel=d_panel;
	
		Border b=BorderFactory.createEtchedBorder(Color.BLUE,Color.RED);
		this.setBorder(b);
	
	
		int i;
		Box vbox=Box.createVerticalBox();
	
	
		JLabel label=new JLabel("CPU BURST TIME");
		vbox.add(label);
	
		
		for(i=0;i<4;i++)
		{
			this.makeslider(i);
			vbox.add(this.panel[i]);
		}
			
		vbox.add(Box.createVerticalStrut(20));
	
		this.okbutton.addActionListener(new buttonlistener());
		vbox.add(okbutton);
	
		vbox.add(Box.createVerticalStrut(20));
		vbox.add(Box.createVerticalStrut(20));
	
		vbox.add(new JLabel("We assume that 4 processes"));
		vbox.add(new JLabel("arrive at the same time"));
		vbox.add(new JLabel("in the order of p0,p1,p2,p3"));
		
		
		vbox.add(Box.createVerticalStrut(20));
	
		ready_label=new JLabel("");
		vbox.add(ready_label);
					
		this.bigpanel.add(vbox);
		this.add(this.bigpanel);
	}
	
	private class buttonlistener implements ActionListener
	{
		public void actionPerformed(ActionEvent event)
		{
			d_panel.areyouready();												
			if(d_panel.get_ready())
			{
				ready_label.setText("ready");
						
			}	
			else
				ready_label.setText("not ready");
		}
						
	}
	private class slider_listener implements ChangeListener
	{
		public void stateChanged(ChangeEvent event)
		{
			JSlider source=(JSlider)event.getSource();
				
			int i=Integer.parseInt(source.getName());
			textfield[i].setText(Integer.toString(source.getValue()));
			d_panel.set_burst(i,source.getValue());			
			
		}
	}
	
	public void makeslider(final int i)
	{
		p[i]=new JSlider();
		p[i].setName(Integer.toString(i));//set the name of the sliders :0,1,2,3
		p[i].setPaintTicks(true);
		p[i].setPaintLabels(true);
		p[i].setMajorTickSpacing(20);
		p[i].setMinorTickSpacing(5);
		p[i].addChangeListener(new slider_listener());
		
		panel[i]=new JPanel();
		String description="process"+Integer.toString(i);
		panel[i].add(new JLabel(description));
		panel[i].add(p[i]);
		
		textfield[i]=new JTextField("",4);
			
		textfield[i].setEditable(false);
		panel[i].add(textfield[i]);
	
				
	}
	
	
	public int get_value(int i)
	{
		if(i>=4 || i<0)
			return -1;
		else	//0,1,2,3
			return p[i].getValue();
	}
		
	private JSlider []p=new JSlider[4];//p0,p1,p2,p3
	private JPanel []panel=new JPanel[4];
	private JTextField []textfield=new JTextField[4];
	private JButton okbutton=new JButton("ok");
	private JPanel bigpanel=new JPanel();
	
	private demonstration d_panel;
	private JLabel ready_label;

}