OS实验+银行家算法（报告+实验完整版）

package com.yason.bankalgorithm; import com.yason.bankalgorithm.base.BaseWindow; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class HomeWindow extends BaseWindow { private JPanel jp1; private JComboBox jcb1;//选择框 private JTextField jtf1;//输入框 private JTextField jtf2; private JTextField jtf3; private JTextField jtf4; private JButton jb1; private JTextArea jta1; private String pname[];//进程数量 private int Source[];//系统各种资源的总量 private int Max[][]; // 最大需求矩阵 private int Allocation[][];// 每个进程现在所分配的各种资源类型的实例数量 private int Available[]; // 可利用资源向量，即每种资源的现有实例数 private int Need[][]; // 每个进程还需要的剩余资源 // private int Work[]; // 系统可供给进程的各类资源数量 // private boolean Finish[]; // 标志一个进程是否可以得到其所需要的资源 // private int Request[]; // 进程对每个资源的实例数的请求数量 private int rowCount;//矩阵行数 private int columnCount;//矩阵列数 @Override protected JFrame setRootView() { JFrame jf = new JFrame(); jf.setSize(500, 350);//大小 jf.setResizable(false);//不可拖动 jf.setLayout(new BorderLayout()); jf.setTitle("银行家算法"); return jf; } @Override protected void initView(JFrame root) { String s[] = {"Allocation", "Max", "Available", "Request"}; jcb1 = new JComboBox(s); jp1 = new JPanel(); jp1.setBackground(new java.awt.Color(128, 255, 128)); jp1.add(jcb1); jp1.add(new JLabel("PID:")); jtf1 = new JTextField(3); jp1.add(jtf1); jp1.add(new JLabel("A:")); jtf2 = new JTextField(3); jp1.add(jtf2); jp1.add(new JLabel("B:")); jtf3 = new JTextField(3); jp1.add(jtf3); jp1.add(new JLabel("C:")); jtf4 = new JTextField(3); jp1.add(jtf4); jb1 = new JButton("确定"); jb1.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { performClick(); } }); jp1.add(jb1); root.add(jp1, "South"); jta1 = new JTextArea(); jta1.setLineWrap(true); jta1.setBackground(Color.white); jta1.setEditable(false); root.add(jta1, "Center"); } @Override protected void loadData() { Source = TestData.Source; Max = TestData.Max; Allocation = TestData.Allocation; pname = TestData.pname; rowCount = Max.length; columnCount = Source.length; Available = new int[columnCount]; Need = new int[rowCount][columnCount]; //计算Available for (int columnIndex = 0; columnIndex < columnCount; columnIndex++) { Available[columnIndex] = Source[columnIndex] - Allocation[0][columnIndex] - Allocation[1][columnIndex] - Allocation[2][columnIndex] - Allocation[3][columnIndex] - Allocation[4][columnIndex]; } //计算Need for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) { for (int columnIndex = 0; columnIndex < columnCount; columnIndex++) { Need[rowIndex][columnIndex] = Max[rowIndex][columnIndex] - Allocation[rowIndex][columnIndex]; } } // Work = new int[columnCount]; // Request = new int[columnCount]; showData(); } private void performClick() { if (jcb1.getSelectedItem() == "Request") { onRequestClick(); } else if (jcb1.getSelectedItem() == "Available") { onAvailableClick(); } else if (jcb1.getSelectedItem() == "Max") { onMaxClick(); } else if (jcb1.getSelectedItem() == "Allocation") { onAllocationClick(); } } private void onAvailableClick() { try { int i2 = Integer.parseInt(jtf2.getText()); int i3 = Integer.parseInt(jtf3.getText()); int i4 = Integer.parseInt(jtf4.getText()); Available[0] = i2; Available[1] = i3; Available[2] = i4; } catch (Exception e) { e.printStackTrace(); JOptionPane.showMessageDialog(null, "您输入有误！请重新输入！", "提示", JOptionPane.ERROR_MESSAGE); return; } showData(); JOptionPane.showMessageDialog(null, "可用资源设置成功！", "提示", JOptionPane.INFORMATION_MESSAGE); } private void onRequestClick() { int pid; int[] Request = new int[columnCount]; try { pid = Integer.parseInt(jtf1.getText()); Request[0] = Integer.parseInt(jtf2.getText()); Request[1] = Integer.parseInt(jtf3.getText()); Request[2] = Integer.parseInt(jtf4.getText()); } catch (Exception d) { JOptionPane.showMessageDialog(null, "您输入有误！请重新输入！", "提示", JOptionPane.ERROR_MESSAGE); return; } if (!checkPid(pid)) { return; } if (!judgeEnough(pid, Request)) {//初步分配检查 return; } int[] safe = saftyCheck(pid, Request); if (safe != null) {//安全性检查 allocate(pid, Request);//检查到安全序列才分配 showData(); StringBuilder sb = new StringBuilder(""); for (int rowIndex = 0; rowIndex < rowCount; rowIndex++) {//打印安全序列 sb.append("P" + String.valueOf(safe[rowIndex]) + " "); } JOptionPane.showMessageDialog(null, "找到了安全序列：" + sb.toString() + "，请求成功！", "提示", JOptionPane.INFORMATION_MESSAGE); } else { //不安全 JOptionPane.showMessageDialog(null, "找不到安全序列！请求失败！", "提示", JOptionPane.ERROR_MESSAGE); } } private void onMaxClick() { int pid = Integer.parseInt(jtf1.getText()); if (!checkPid(pid)) { return; } int[] Maxago = new int[columnCount]; //暂存最大需求 int[] Needago = new int[columnCount]; //暂存最大需求 try { Maxago[0] = Integer.parseInt(jtf2.getText()); Maxago[1] = Integer.parseInt(jtf3.getText()); Maxago[2] = Integer.parseInt(jtf4.getText()); } catch (NumberFormatException e) { e.printStackTrace(); JOptionPane.showMessageDialog(null, "输入有误！请重新输入", "提示", JOptionPane.ERROR_MESSAGE); return; } for (int coloumIndex = 0; coloumIndex < columnCount; coloumIndex++) { //判断设置是否合理 int temp = Maxago[coloumIndex] - Allocation[pid][coloumIndex]; if (temp >= 0) Needago[coloumIndex] = temp; else { JOptionPane.showMessageDialog(null, "最大需求过小！请重新输入", "提示", JOptionPane.ERROR_MESSAGE); return; } } for (int coloumIndex = 0; coloumIndex < columnCount; coloumIndex++) { Max[pid][coloumIndex] = Maxago[coloumIndex]; Need[pid][coloumIndex] = Needago[coloumIndex]