Thread.sleep 后 Java GUI 未启动

Question

我试图在满足某个条件时弹出一个窗口，但是当满足条件时。窗口没有打开。我正在使用 Thread.sleep代码：public void grow() {    Thread thread = new Thread(() -> {        try {            Thread.sleep(this.harvestTime);            if(water >= waterNeeded && fertelizer >= fertelizerNeeded) {                this.harvest = true;                AlertBox.display("CROP ALERT","A SEED HAS FINISHED GROWING");                Thread.sleep(60000);                if(harvest == true) {                    withered = true;                    harvest = false;                    AlertBox.display("ALERT", "FAILED TO HARVEST A CROP. IT BECAME WITHERED!");                }            }            else {                this.withered = true;            }        } catch (Exception e) {        }    });    thread.start();}