java语言实现有界面的FCFS进程调度算法
时间: 2023-10-22 14:08:13 浏览: 115
为了实现有界面的FCFS进程调度算法,我们需要使用Java语言编写一个图形用户界面(GUI)来模拟进程调度过程。以下是一个简单的实现:
1. 创建一个Java类来表示进程,包含以下属性:
- 进程ID
- 进程名称
- 进程状态(就绪、运行、完成)
- 进程到达时间
- 进程需要的CPU时间
- 进程完成时间
- 进程等待时间
- 进程周转时间
2. 创建一个Java类来表示进程队列,包含以下方法:
- 将进程加入队列
- 从队列中取出下一个进程
- 检查队列是否为空
- 获取队列中进程数量
3. 创建一个Java类来表示进程调度器,包含以下方法:
- 初始化进程队列
- 运行FCFS进程调度算法
- 计算每个进程的完成时间、等待时间和周转时间
4. 创建一个Java类来表示GUI,包含以下组件:
- 进程列表,用于显示所有进程的信息
- 添加进程按钮,用于添加新的进程
- 开始按钮,用于开始模拟进程调度
- 重置按钮,用于重置模拟状态
- 进程调度器实例,用于处理进程调度
5. 在GUI中实现添加进程、开始模拟和重置模拟的事件处理方法,并将它们与相应的按钮关联。
6. 在GUI中实现进程列表的更新方法,在每个进程被添加或调度时更新列表。
7. 在GUI中实现进程调度器的初始化和运行方法,并在开始模拟时调用它们。
8. 在GUI中实现重置模拟的方法,重置所有进程状态并清空进程列表。
这个实现只是一个简单的示例,你可以根据需要进行调整和扩展。
相关问题
java实现多个进程调度算法,有界面
实现多个进程调度算法需要考虑到进程调度的核心算法和界面的交互设计。以下是一个简单的实现示例:
1. 进程调度算法
可以选择实现以下常见的进程调度算法:
- 先来先服务(FCFS)
- 短作业优先(SJF)
- 优先级调度(Priority Scheduling)
- 时间片轮转(Round Robin)
2. 界面设计
可以使用Java Swing库来创建用户界面。在主界面上,需要提供以下功能:
- 显示当前正在运行的进程
- 显示已经完成的进程
- 提供添加新进程的功能,包括进程名、到达时间、需要执行的时间等信息
- 提供选择不同的调度算法的功能,并根据算法进行进程调度
- 显示各个进程的执行情况,包括开始时间、结束时间、等待时间、周转时间等信息
3. 实现示例
以下是一个简单的实现示例,仅供参考:
```java
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.SwingConstants;
import javax.swing.border.EmptyBorder;
import javax.swing.table.DefaultTableModel;
public class ProcessScheduler extends JFrame {
private JPanel contentPane;
private JTextField txtName;
private JTextField txtArrivalTime;
private JTextField txtBurstTime;
private JTable table;
private DefaultTableModel model;
private List<Process> processList = new ArrayList<>();
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ProcessScheduler frame = new ProcessScheduler();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
public ProcessScheduler() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 400);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
contentPane.setLayout(null);
JLabel lblName = new JLabel("Name:");
lblName.setBounds(20, 20, 80, 25);
contentPane.add(lblName);
txtName = new JTextField();
txtName.setBounds(100, 20, 100, 25);
contentPane.add(txtName);
txtName.setColumns(10);
JLabel lblArrivalTime = new JLabel("Arrival Time:");
lblArrivalTime.setBounds(20, 50, 80, 25);
contentPane.add(lblArrivalTime);
txtArrivalTime = new JTextField();
txtArrivalTime.setBounds(100, 50, 100, 25);
contentPane.add(txtArrivalTime);
txtArrivalTime.setColumns(10);
JLabel lblBurstTime = new JLabel("Burst Time:");
lblBurstTime.setBounds(20, 80, 80, 25);
contentPane.add(lblBurstTime);
txtBurstTime = new JTextField();
txtBurstTime.setBounds(100, 80, 100, 25);
contentPane.add(txtBurstTime);
txtBurstTime.setColumns(10);
JButton btnAdd = new JButton("Add");
btnAdd.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
String name = txtName.getText();
int arrivalTime = Integer.parseInt(txtArrivalTime.getText());
int burstTime = Integer.parseInt(txtBurstTime.getText());
processList.add(new Process(name, arrivalTime, burstTime));
showProcessList();
clearInputFields();
}
});
btnAdd.setBounds(20, 120, 80, 25);
contentPane.add(btnAdd);
model = new DefaultTableModel();
model.addColumn("Name");
model.addColumn("Arrival Time");
model.addColumn("Burst Time");
model.addColumn("Start Time");
model.addColumn("End Time");
model.addColumn("Waiting Time");
model.addColumn("Turnaround Time");
table = new JTable(model);
table.setBounds(220, 20, 350, 300);
contentPane.add(table);
JButton btnFcfs = new JButton("FCFS");
btnFcfs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
List<Process> resultList = fcfs(processList);
showResultList(resultList);
}
});
btnFcfs.setBounds(20, 160, 80, 25);
contentPane.add(btnFcfs);
JButton btnSjf = new JButton("SJF");
btnSjf.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
List<Process> resultList = sjf(processList);
showResultList(resultList);
}
});
btnSjf.setBounds(20, 200, 80, 25);
contentPane.add(btnSjf);
JButton btnPriority = new JButton("Priority");
btnPriority.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
List<Process> resultList = priority(processList);
showResultList(resultList);
}
});
btnPriority.setBounds(20, 240, 80, 25);
contentPane.add(btnPriority);
JButton btnRoundRobin = new JButton("Round Robin");
btnRoundRobin.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int timeSlice = Integer.parseInt(txtTimeSlice.getText());
List<Process> resultList = roundRobin(processList, timeSlice);
showResultList(resultList);
}
});
btnRoundRobin.setBounds(20, 280, 120, 25);
contentPane.add(btnRoundRobin);
JLabel lblTimeSlice = new JLabel("Time Slice:");
lblTimeSlice.setBounds(150, 280, 80, 25);
contentPane.add(lblTimeSlice);
txtTimeSlice = new JTextField();
txtTimeSlice.setBounds(220, 280, 50, 25);
contentPane.add(txtTimeSlice);
txtTimeSlice.setColumns(10);
}
private void clearInputFields() {
txtName.setText("");
txtArrivalTime.setText("");
txtBurstTime.setText("");
}
private void showProcessList() {
model.setRowCount(0);
for (Process process : processList) {
Object[] rowData = new Object[3];
rowData[0] = process.getName();
rowData[1] = process.getArrivalTime();
rowData[2] = process.getBurstTime();
model.addRow(rowData);
}
}
private void showResultList(List<Process> resultList) {
model.setRowCount(0);
for (Process process : resultList) {
Object[] rowData = new Object[7];
rowData[0] = process.getName();
rowData[1] = process.getArrivalTime();
rowData[2] = process.getBurstTime();
rowData[3] = process.getStartTime();
rowData[4] = process.getEndTime();
rowData[5] = process.getWaitingTime();
rowData[6] = process.getTurnaroundTime();
model.addRow(rowData);
}
}
private List<Process> fcfs(List<Process> processList) {
List<Process> resultList = new ArrayList<>();
int currentTime = 0;
for (Process process : processList) {
process.setStartTime(currentTime);
process.setEndTime(currentTime + process.getBurstTime());
process.setWaitingTime(currentTime - process.getArrivalTime());
process.setTurnaroundTime(process.getEndTime() - process.getArrivalTime());
currentTime = process.getEndTime();
resultList.add(process);
}
return resultList;
}
private List<Process> sjf(List<Process> processList) {
List<Process> resultList = new ArrayList<>();
int currentTime = 0;
while (!processList.isEmpty()) {
Process shortestProcess = null;
for (Process process : processList) {
if (shortestProcess == null || process.getBurstTime() < shortestProcess.getBurstTime()) {
shortestProcess = process;
}
}
processList.remove(shortestProcess);
shortestProcess.setStartTime(currentTime);
shortestProcess.setEndTime(currentTime + shortestProcess.getBurstTime());
shortestProcess.setWaitingTime(currentTime - shortestProcess.getArrivalTime());
shortestProcess.setTurnaroundTime(shortestProcess.getEndTime() - shortestProcess.getArrivalTime());
currentTime = shortestProcess.getEndTime();
resultList.add(shortestProcess);
}
return resultList;
}
private List<Process> priority(List<Process> processList) {
List<Process> resultList = new ArrayList<>();
int currentTime = 0;
while (!processList.isEmpty()) {
Process highestPriorityProcess = null;
for (Process process : processList) {
if (highestPriorityProcess == null || process.getPriority() < highestPriorityProcess.getPriority()) {
highestPriorityProcess = process;
}
}
processList.remove(highestPriorityProcess);
highestPriorityProcess.setStartTime(currentTime);
highestPriorityProcess.setEndTime(currentTime + highestPriorityProcess.getBurstTime());
highestPriorityProcess.setWaitingTime(currentTime - highestPriorityProcess.getArrivalTime());
highestPriorityProcess.setTurnaroundTime(highestPriorityProcess.getEndTime() - highestPriorityProcess.getArrivalTime());
currentTime = highestPriorityProcess.getEndTime();
resultList.add(highestPriorityProcess);
}
return resultList;
}
private List<Process> roundRobin(List<Process> processList, int timeSlice) {
List<Process> resultList = new ArrayList<>();
int currentTime = 0;
int remainingTimeSlice = 0;
while (!processList.isEmpty()) {
Process currentProcess = processList.get(0);
if (currentProcess.getBurstTime() <= timeSlice - remainingTimeSlice) {
processList.remove(0);
currentProcess.setStartTime(currentTime);
currentProcess.setEndTime(currentTime + currentProcess.getBurstTime());
currentProcess.setWaitingTime(currentTime - currentProcess.getArrivalTime());
currentProcess.setTurnaroundTime(currentProcess.getEndTime() - currentProcess.getArrivalTime());
currentTime = currentProcess.getEndTime();
resultList.add(currentProcess);
remainingTimeSlice = 0;
} else {
currentProcess.setBurstTime(currentProcess.getBurstTime() - timeSlice + remainingTimeSlice);
processList.remove(0);
processList.add(currentProcess);
remainingTimeSlice = timeSlice;
}
}
return resultList;
}
private JTextField txtTimeSlice;
}
class Process {
private String name;
private int arrivalTime;
private int burstTime;
private int priority;
private int startTime;
private int endTime;
private int waitingTime;
private int turnaroundTime;
public Process(String name, int arrivalTime, int burstTime) {
this.name = name;
this.arrivalTime = arrivalTime;
this.burstTime = burstTime;
}
public String getName() {
return name;
}
public int getArrivalTime() {
return arrivalTime;
}
public int getBurstTime() {
return burstTime;
}
public int getPriority() {
return priority;
}
public void setPriority(int priority) {
this.priority = priority;
}
public int getStartTime() {
return startTime;
}
public void setStartTime(int startTime) {
this.startTime = startTime;
}
public int getEndTime() {
return endTime;
}
public void setEndTime(int endTime) {
this.endTime = endTime;
}
public int getWaitingTime() {
return waitingTime;
}
public void setWaitingTime(int waitingTime) {
this.waitingTime = waitingTime;
}
public int getTurnaroundTime() {
return turnaroundTime;
}
public void setTurnaroundTime(int turnaroundTime) {
this.turnaroundTime = turnaroundTime;
}
}
```
Java实现进程调度算法,有界面
Java实现进程调度算法的界面可以使用Swing或JavaFX框架来实现。具体实现步骤如下:
1. 设计界面布局,包括进程信息的显示区域、调度算法选择区域、操作按钮区域等。
2. 使用Java中的线程类来模拟进程的执行,可以使用Runnable接口或Thread类来实现。
3. 实现进程调度算法,常见的算法有先来先服务(FCFS)、最短作业优先(SJF)、时间片轮转(RR)等。根据用户选择的算法,对进程进行排序或调度。
4. 将调度结果显示在界面中,包括进程执行顺序、等待时间、周转时间等指标。
5. 添加操作按钮,包括开始调度、暂停、继续、重置等按钮,方便用户控制调度过程。
6. 最后,可以添加一些额外功能,如数据保存、导入、导出等,方便用户进行数据管理。
需要注意的是,Java实现进程调度算法并不是一个简单的任务,需要具备一定的编程基础和算法知识,所以建议在学习相关知识后再进行实现。
阅读全文