瓜子二面面经(Java后台)
两个线程同时启动去争抢一把锁，抢到锁的打印1-5，之后再释放锁，另一个线程拿到锁之后打印6-10，主线程再打印success
public class Solution1 {
private static final Object mylock = new Object();
private static int flag = 0;
static class MyThread extends Thread{
private String name;
public MyThread(String name){
this.name = name;
}
@Override
public void run(){
synchronized (mylock){
try {
if(flag == 0){
for (int i = 1; i <= 5 ; i++) {
System.out.println(name+ ":" +i);
}
flag = 1;
mylock.wait();
}else {
for (int i = 6; i <= 10 ; i++) {
System.out.println(name+ ":" +i);
}
mylock.notify();
}
}catch (Exception e){
e.printStackTrace();
}
}
}
}
public static void main(String[] args) {
Thread thread1 = new MyThread("thread-1");
Thread thread2 = new MyThread("thread-2");
try {
thread1.start();
thread2.start();
thread1.join();
thread2.join();
System.out.println("success");
}catch (Exception e){
e.printStackTrace();
}
}
} 
但我觉得也要想到一点就是卷后端的人里真正有“料”的人又有多少，我说的这个料都不是说一定要到大佬那种级别，而是就一个正常的水平。即使是现在也有很多人是跟风转码的，2-3个月速成后端技术栈的人数不胜数，但今时不同往日没可能靠速成进大厂了。这种情况就跟考研一样，你能上考场就已经打败一半的人了