JAVA实现的操作系统页面置换

import java.awt.BorderLayout; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import javax.swing.*; import javax.swing.border.TitledBorder; public class kaka extends JPanel implements ActionListener { JPanel panel_north,panel_center,panel_south;//北、中、南三个面板 JPanel panel_north_1, panel_north_2, panel_south_1, panel_south_2;//面板中的面板 JButton button_fifo, button_lru, button_opt;//三种算法的三个按钮 JTextField text_wulikuai, text_yemian,text_queyeshu, text_queyelv, text_zhihuanshu, text_zhihuanlv; JTextArea textarea;//中部过程输出区域 JTextArea textarea2;//随机序列显示区域 JTextArea textarea3;//手动输入序列显示区域 JScrollPane scrollPane_1 ;//上面三个文本区域应用的滚动条 JScrollPane scrollPane_2 ; JScrollPane scrollPane_3 ; private ButtonGroup buttonGroup = new ButtonGroup();//随机、手动序列单选按钮 final JRadioButton radioButton1,radioButton2; randomNumber RN;//随机生成的数列 String m_random = "";// 用于存储页面序列 int m, n;//m物理块数 n页面总数 int wuli[];//存放物理块中现有的页面号 int xulie[];//页面存储序列数组 public kaka() {//构造初始化 panel_north = new JPanel(); panel_north_1 = new JPanel(); panel_north_2 = new JPanel(); panel_south = new JPanel(); panel_south_1 = new JPanel(); panel_south_2 = new JPanel(); panel_center = new JPanel(); text_wulikuai = new JTextField(4); text_yemian = new JTextField(5); text_queyeshu = new JTextField(); text_queyeshu.setEditable(false); text_queyelv = new JTextField(); text_queyelv.setEditable(false); text_zhihuanshu = new JTextField(); text_zhihuanshu.setEditable(false); text_zhihuanlv = new JTextField(); text_zhihuanlv.setEditable(false); panel_north_1.add(new JLabel(" 请输入数据-> ")); panel_north_1.add(new JLabel(" 物理块数 ")); panel_north_1.add(text_wulikuai); text_wulikuai.addKeyListener(new NumListener()); panel_north_1.add(new JLabel(" 置换页面数 ")); panel_north_1.add(text_yemian); text_yemian.addKeyListener(new NumListener());//添加键盘监听 只能输入数字和空格 panel_north_2.setLayout(new GridLayout(4, 1)); textarea2 = new JTextArea(1,60); textarea3 = new JTextArea(1,70); textarea2.setEditable(false); textarea3.setEditable(false); textarea2.setLineWrap(true); //输入内容自动换行 textarea2.setWrapStyleWord(true);//输入英文时不会将一个单词分在两行里 textarea3.setLineWrap(true); textarea3.setWrapStyleWord(true); textarea3.addKeyListener(new NumListener()); scrollPane_2 = new JScrollPane(textarea2);//文本区域应用滚动条 scrollPane_3 = new JScrollPane(textarea3); radioButton1 = new JRadioButton(); panel_north_2.add(radioButton1); buttonGroup.add(radioButton1); radioButton1.setText("随机页面序列"); radioButton1.setSelected(true); radioButton1.addActionListener(new ActionListener() {//选择按钮触发事件 public void actionPerformed(ActionEvent e) { textarea3.setText(""); textarea3.setEditable(false); } }); panel_north_2.add(scrollPane_2); radioButton2 = new JRadioButton(); panel_north_2.add(radioButton2); buttonGroup.add(radioButton2); radioButton2.setText("指定页面序列"); radioButton2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { textarea2.setText(""); textarea3.setEditable(true); //textarea3.setFocusable(true);这样获取焦点为什么不行？ //textarea3.grabFocus();//这样可行 textarea3.requestFocus(true);//获取焦点 } }); panel_north_2.add(scrollPane_3); panel_north.setLayout(new GridLayout(2, 2)); panel_north.add(panel_north_1); panel_north.add(panel_north_2); panel_center.setBorder(new TitledBorder(null, "页面置换过程", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, null)); textarea = new JTextArea(20,60); textarea.setEditable(false); textarea.setLineWrap(true); //输入内容自动换行 textarea.setWrapStyleWord(true);//输入英文时不会将一个单词分在两行里 scrollPane_1 = new JScrollPane(textarea); panel_center.add(scrollPane_1); panel_south_1.setBorder(new TitledBorder(null, "数据统计结果", TitledBorder.DEFAULT_JUSTIFICATION, TitledBorder.DEFAULT_POSITION, null, null)); panel_south_1.setLayout(new GridLayout(2, 2)); panel_south_1.add(new JLabel(" 缺页数")); panel_south_1.add(text_queyeshu); panel_south_1.add(new JLabel(" 缺页率")); panel_south_1.add(text_queyelv); panel_south_1.add(new JLabel(" 置换次数")); panel_south_1.add(text_zhihuanshu); panel_south_1.add(new JLabel(" 置换率")); panel_south_1.add(text_zhihuanlv); button_fifo = new JButton("FIFO"); button_lru = new JButton("LRU"); button_opt = new JButton("OPT"); button_fifo.addActionListener(this); button_lru.addActionListener(this); button_opt.addActionListener(this); panel_south_2.add(button_fifo); panel_south_2.add(button_lru); panel_south_2.add(button_opt); setLayout(new BorderLayout()); panel_south.setLayout(new GridLayout(2, 2)); panel_south.add(BorderLayout.NORTH, panel_south_1); panel_south.add(BorderLayout.CENTER, panel_south_2); add(BorderLayout.NORTH, panel_north); add(BorderLayout.CENTER, panel_center); add(BorderLayout.SOUTH, panel_south); } public void inputCheck(){//计算前检查输入并初始化相关数据 if(text_wulikuai.getText().trim().length()==0){ JOptionPane.showMessageDialog(null, "请输入物理块数！"); text_wulikuai.requestFocus(true); return; } if(text_yemian.getText().length()==0){ JOptionPane.showMessageDialog(null, "请输入页面总数！"); text_yemian.requestFocus(true); return; } m = Integer.parseInt(text_wulikuai.getText().trim()); n = Integer.parseInt(text_yemian.getText().trim()); if(m==0){ JOptionPane.showMessageDialog(null, "物理块数不能为0！"); text_wulikuai.setText(""); text_wulikuai.requestFocus(true); return; } if(n==0){ JOptionPane.showMessageDialog(null, "页面总数不能为0！"); text_yemian.setText(""); text_yemian.requestFocus(true); return; } if(m>=n){ JOptionPane.showMessageDialog(null, "物理块小于页面总数！"); text_yemian.requestFocus(true); return; } if(radioButton1.isSelected()){//随机产生 String str1="",str2=""; RN = new randomNumber(); xulie = RN.rand(n, n); for (int i = 0; i < n; i++) { str2 = String.valueOf(xulie[i]); str1 = str1 + " " + str2; } textarea2.setText("" + str1);//在随机序列区域中显示生成的页面序列 } if(radioButton2.isSelected()){//手动输入 if(textarea3.getText().trim().length()==0){ JOptionPane.showMessageDialog(null, "请输入页面序列！"); textarea3.requestFocus(true); return; } String input = textarea3.getText();//获取输入的内容 String[] change = input.split("[\\t \\n]+");//将输入内容以空格或回车为分隔 切割转换成字符串数组 if(change.length<n){ JOptionPane.showMessageDialog(null, "输入页面序列个数小于总页面数！"); textarea3.requestFocus(true); return; }else if(change.length>n){ JOptionPane.showMessageDialog(null, "输入页面序列个数大于总页面数！"); textarea3.requestFocus(true); return; } int arr[] = new int[change.length]; for(int d = 0;d<change.length;d++) { arr[d] = Integer.parseInt(change[d]);//字符串数组转换成整形数组 if(arr[d]>n){ JOptionPane.showMessageDialog(null, "请不要在输入页面序列中输入大于页面总数的页面数！"); textarea3.requestFocus(true); return; } //xulie[d] = Integer.parseInt(change[d]);为什么不能这样直接换 } xulie = arr;//将转换后的数组赋值给存储序列的整形数组 } } publ