我制作了一个包含 5 个表和叉子的简单 GUI，并试图可视化这个著名的问题，但我无法完全实现。我没有得到我的代码的卡点，如果有人建议我解决这个问题，任何帮助将不胜感激并提前感谢！额外说明：还有一个错误，我猜这与我的数组创建想法有关，我有一个错误为 java.lang.ArrayIndexOutOfBoundsException: 5。
public class Philosopher implements Runnable {
private static Table table;
private int ID;
private int N = 5;
private static Semaphore s1 = new Semaphore(1) ;
private static Semaphore[] sarray = new Semaphore[5];
private int[] array = new int[5];
private int thinking = 0;
private int hungry = 1;
private int eating = 2;
private int left = (ID + N - 1) % N;
private int right = (ID + 1) % N;
void test(int i)
{
if((array[i] == hungry) && (array[left] != eating) && (array[right] != eating))
{
table.ForkTake_GUI(i);
array[i] = eating;
sarray[i].release();
}
}
void take_forks(int i)
{
try {
s1.acquire();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
array[i] = hungry;
table.Hungry_GUI(i);
test(i);
s1.release();
table.Eating_GUI(i);
sarray[i].release();
}
void put_forks(int i)
{
table.StopEating_GUI(i);
try {
s1.acquire();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
array[i] = thinking;
test(left);
test(right);
table.ForkPut_GUI(i);
s1.release();
}
public Philosopher(int i)
{
setID(i);
}
public void run()
{
while(true)
{
Random RandomGenerator = new Random();
int randomNum = RandomGenerator.nextInt(10);
try {
Thread.sleep((randomNum * 1000));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
take_forks(ID);
//table.Eating_GUI();
put_forks(ID);
}
}
public static void main(String args[]) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
table = new Table();
table.frame.setVisible(true);
}
catch(Exception e){
e.printStackTrace();
}
}
});
Philosopher p1 = new Philosopher(1);
Philosopher p2 = new Philosopher(2);
Philosopher p3 = new Philosopher(3);
Philosopher p4 = new Philosopher(4);
Philosopher p5 = new Philosopher(5);
Thread pt1 = new Thread(p1);
Thread pt2 = new Thread(p2);
Thread pt3 = new Thread(p3);
Thread pt4 = new Thread(p4);
Thread pt5 = new Thread(p5);
sarray[0] = new Semaphore(1);
sarray[1] = new Semaphore(1);
sarray[2] = new Semaphore(1);
sarray[3] = new Semaphore(1);
sarray[4] = new Semaphore(1);
pt1.start();
pt2.start();
pt3.start();
pt4.start();
pt5.start();
}
public int getID() {
return ID;
}
public void setID(int iD) {
ID = iD;
}
}