操作系统作业（进程控制管理实现）

package Process_show_memory; import javax.swing.*; import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import java.util.*; //进程节点的类 封装了表示进程特点的各个变量 class MyProcess{ protected String processName; protected int processFirstAddr; protected int processSize; MyProcess(){ processName=""; processFirstAddr=100; processSize=0; } MyProcess(String name,int addr,int size){ processName=name; processFirstAddr=addr; processSize=size; } MyProcess(MyProcess cur){ processName=cur.processName; processFirstAddr=cur.processFirstAddr; processSize=cur.processSize; } } //内存节点类 每个节点包含一个进程节点和站位标志isHas class MyMemory extends MyProcess{ protected boolean isHas; MyMemory(){ super(); isHas=true; } MyMemory(String name,int addr,int size,boolean is){ super(name,addr,size); isHas=is; } MyMemory(MyMemory cur){ super((MyProcess)cur); isHas=cur.isHas; } } //含main方法的主类 public class Process_show_memory extends JFrame implements ActionListener{ //show面板最上边小面板的设置方法 public void setPanel(JPanel pp,JLabel lab,String labelName,Font fon,int xx,int yy){ pp=new JPanel(); show.add(pp); pp.setBackground(Color.white); pp.setBounds(xx,yy,110,35); lab=new JLabel(labelName,JLabel.CENTER); pp.add(lab); lab.setFont(fon); lab.setForeground(new Color(184,50,177)); pp.setVisible(true); } //controller面板上按钮的设置方法 public void setCon(JButton button,String name,int y,Font fon){ button=new JButton(name); button.addActionListener(this); button.setActionCommand(name); controller.add(button); button.setBounds(18,y,120,40); button.setFont(fon); button.setForeground(Color.blue); } //!!!!!!!!!!!!!!!!!!!构造方法开始!!!!!!!!!!!!!!!! public Process_show_memory() { setSize(900,640); setLocationRelativeTo(null); setTitle("操作体统作业：进程模拟"); setResizable(false); setVisible(true); setLayout(null); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //各个进程状态列表的初始化 leisureNum=10; readyList=new LinkedList<MyProcess>(); runList=new LinkedList<MyProcess>(); blockList=new LinkedList<MyProcess>(); memoryList=new LinkedList<MyMemory>(); curMemory=new MyMemory("空闲区",100,540,false); memoryList.addLast(curMemory); //建立内存链表首节点 MyMemory curCopy=new MyMemory(curMemory); leisureMemoryList=new LinkedList<MyMemory>(); leisureMemoryList.addLast(curCopy); //建立空闲内存链表首节点 //两块主面板 show 显示块 和 controller控制块 show = new JPanel(null); controller = new JPanel(null); show.setBounds(0,0,744,610);//左边显示区域 controller.setBounds(744,0,156,610);//右边控制按钮区 add(show); add(controller); show.setBackground(new Color(0,255,204)); controller.setBackground(new Color(0,242,193)); show.setVisible(true); controller.setVisible(true); //=============show显示块的代码(内嵌showProcess)================== ff=new Font("bold",Font.BOLD,18); setPanel(panel1,label1,"空闲态列表",ff,15,15); setPanel(panel2,label2,"就绪态列表",ff,140,15); setPanel(panel3,label3,"执行态列表",ff,265,15); setPanel(panel4,label4,"阻塞态列表",ff,390,15); setPanel(panel5,label5,"内存分配图",ff,515,15); showProcess = new MyPanel(null);//作为画板显示进程状态 showProcess.setBounds(0,50,744,502); show.add(showProcess); showProcess.setBackground(Color.blue); showProcess.setVisible(true); tip=new JTextField(""); input=new JTextField(""); input.addActionListener(this); input.setActionCommand("tip"); show.add(tip); show.add(input); tip.setFont(ff); input.setFont(ff); tip.setForeground(new Color(138,38,133)); input.setForeground(new Color(184,50,177)); tip.setBackground(new Color(128,253,190)); input.setBackground(new Color(128,253,190)); tip.setBounds(0,552,744,28); input.setBounds(0,580,744,28); tip.setEditable(false); tip.setVisible(true); input.setVisible(true); //=================controller显示块的代码================= setCon(create,"创建进程",265-65*3,ff); setCon(dispatch,"调度进程",265-65*2,ff); setCon(block,"阻塞进程",265-65,ff); setCon(wakeup,"唤醒进程",265,ff); setCon(timeout,"时间片到",265+65,ff); setCon(end,"结束进程",265+65*2,ff); setCon(quit,"退出程序",265+65*3,ff); }//!!!!!!!!!!!!!!!!!构造方法完毕!!!!!!!!!!!!!!!!!!!! //!!!!!!!!!!!!!!!!!事件响应代码开始!!!!!!!!!!!!!!!!! public void actionPerformed(ActionEvent evt){ tip.setText(""); Object src=evt.getSource(); if(src instanceof JButton){ String source=((JButton)evt.getSource()).getActionCommand(); if(source.equals("创建进程")){ if(leisureNum>0){ input.setEnabled(true); tip.setText("请输入想创建的进程名："); textState=0; input.requestFocusInWindow(); }else { tip.setText("已达系统最大进程数，不能再创建！"); input.setEditable(false); } } else if(source.equals("调度进程")||source.equals("时间片到")){ if(!readyList.isEmpty()){ if(!runList.isEmpty()) readyList.addLast(runList.removeFirst()); runList.addLast(readyList.removeFirst()); } else tip.setText("没有就绪状态的进程！"); } else if(source.equals("阻塞进程")){ if(!runList.isEmpty()){ blockList.addLast(runList.removeFirst()); if(!readyList.isEmpty()) runList.addLast(readyList.removeFirst()); } else tip.setText("没有运行状态的进程！"); } else if(source.equals("唤醒进程")){ if(blockList.isEmpty()==false){ if(runList.isEmpty()) runList.addLast(blockList.removeFirst()); else readyList.addLast(blockList.removeFirst()); } else tip.setText("没有阻塞状态的进程！"); } else if(source.equals("结束进程")){ if(!runList.isEmpty()){ removeMemory(leisureMemoryList,memoryList,(MyMemory)runList.getFirst()); if(!readyList.isEmpty()){ runList.clear(); runList.addLast(readyList.removeFirst()); } else runList.clear(); leisureNum++; } else tip.setText("没有运行状态的进程！"); } else if(source.equals("退出程序")) System.exit(0); } else if(src instanceof JTextField){ switch(textState){ case 0: curMemory=new MyMemory(); curMemory.processName=input.getText(); input.setText(""); tip.setText("请输入该进程需要的内存空间(1-540)："); textState=1; break; case 1: try{ curMemory.processSize=new Integer(input.getText()); }catch(Exception e){ tip.setText("您输入的内存数中含无效字符,请重新创建进程！"); input.setText(""); input.transferFocus(); input.setEnabled(false); break; } input.setText(""); if(curMemory.processSize==0){ tip.setText("进程所需内存不能为0,请重新创建进程！"); input.transferFocus(); input.setEnabled(false); }else { int flag_i=isCreate(leisureMemoryList,memoryList,curMemory); if(flag_i==-1){ tip.setText("内存不足,不能创建该进程！"); input.setEnabled(false); }else if(flag_i==-2){ tip.setText("所需内存已超过系统总内存,不能创建该进程！"); input.setEnabled(false); }else { addMemory(leisureMemoryList,memoryList,flag_i,curMemory); if(runList.isEmpty()) runList.addLast(curMemory); else readyList.addLast(curMemory); leisureNum--; input.transferFocus(); } } } } showProcess.repaint();