我正在尝试用Java中的两个线程来实现Dekker算法。但是由于某种原因，只有一个线程在做这项工作。请帮帮我。
public class Dekkers {
static int turn = 0;
static boolean [] flag = {false,false};
public static class thread1 implements Runnable{
@Override
public void run() {
for(int i = 0; i<5;i++) {
flag[0]=true;
while(flag[1]) {
if(turn ==1) {
flag[0]=false;
while (turn==1) {}
flag[0]=true;}}
Random rand =new Random();
System.out.println("We hold these truths to be self-evident, that all men are created equal,1");
try {
Thread.sleep(1000000000);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("that they are endowed by their Creator with certain unalienable Rights,1");
try {
Thread.sleep(rand.nextInt(20));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("that among these are Life, Liberty and the pursuit of Happiness.1");
try {
Thread.sleep(rand.nextInt(20));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
turn = 1;
flag[0]=false;
}
}
}
public static class thread2 implements Runnable{
@Override
public void run() {
for(int i = 0; i<5;i++) {
flag[1]=true;
while(flag[0]) {
if(turn ==0) {
flag[1]=false;
System.out.print("changed");
while (turn==0) {}
flag[1]=true;}}
Random rand =new Random();
System.out.println("We hold these truths to be self-evident, that all men are created equal,");
try {
Thread.sleep(rand.nextInt(20));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("that they are endowed by their Creator with certain unalienable Rights,");
try {
Thread.sleep(rand.nextInt(20));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
System.out.println("that among these are Life, Liberty and the pursuit of Happiness.");
try {
Thread.sleep(rand.nextInt(20));
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
turn = 0;
flag[1]=false;
}
}
}
public static void main(String[] args) {
Thread thread1 = new Thread(new thread1()) ;
Thread thread2 = new Thread(new thread2()) ;
thread1.start();
thread2.start();
}
}
预期的输出：每个线程应打印五行以下行而不进行交织： 1.我们认为这些真理是不言而喻的，即所有人都是平等的， 2.创造者赋予他们某些不可剥夺的权利， 3.其中包括生命，自由和对幸福的追求。
实际输出是仅通过一个线程将五行打印出的三行