Java 使用while循环强制代码等待条件需要thread.sleep（）
我创建了一个程序，它将线性搜索-1分成4个独立的线程Java 使用while循环强制代码等待条件需要thread.sleep（）,java,multithreading,Java,Multithreading,我创建了一个程序，它将线性搜索-1分成4个独立的线程 public class main { static boolean found = false; public static void main(String[] args) { // TODO Auto-generated method stub int threadCount = 4; //amount of threads to use Random rand =
public class main {
static boolean found = false;
public static void main(String[] args) {
// TODO Auto-generated method stub
int threadCount = 4; //amount of threads to use
Random rand = new Random();
Searcher[] s_arr = new Searcher[threadCount]; //array of threads
int[] arr = new int[10000]; //array to search through
for (int i = 0; i < arr.length; i++) //randomizing #'s in array
arr[i] = (int) (rand.nextFloat() * 1000);
int randIndex = rand.nextInt(arr.length); //choose random index
arr[randIndex] = -1; //set random index to = -1
for (int i = 0; i < threadCount; i++) { //
s_arr[i] = new Searcher(Arrays.copyOfRange(arr, i * (arr.length/threadCount), (i+1) * (arr.length/threadCount)),
(int) (i), i); //assign subarray for this thread to search through
System.out.println(s_arr[i].wait);
s_arr[i].start();
}
//CODE IN QUESTION HERE ----------------------------
//while (!found) ;
while (!found) //wait until value is found
{
try {
Thread.sleep(1);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
//-----------------------------------------------------------
System.out.println("found!");
for (int i = 0; i < threadCount; i++) {
try {
s_arr[i].join(); //wait for the threads in order before continuing
System.out.println("Thread ["+i+"] completed");
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("All threads stopped, program complete.");
}
}
public class Searcher extends Thread {
int[] arr;
int wait;
int index;
public Searcher(int[] arr, int wait, int i) {
this.arr = arr;
this.wait = wait;
this.index = i;
}
@Override
public void run() {
for (int i = 0; i < arr.length; i++) {
if (arr[i] == -1) {
System.out.println("["+index+"] -1 Found at index: "+i);
main.found = true;
break;
}
if (main.found) break;
//purposely slow down this thread
try {
Thread.sleep(wait);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
System.out.println("["+index+"] has stopped");
}
}