public class Main extends Thread {
public static int amount = 0;
public static void main(String[] args) {
Main thread = new Main();
thread.start();
// 等待线程执行完成
while(thread.isAlive()) {
System.out.println("等待中...");
}
// 更新 amount 并打印其值
System.out.println("主线程: " + amount);
amount++;
System.out.println("主线程: " + amount);
}
public void run() {
amount++;
}
}