如何使Java延迟几秒钟？ [英] How to make java delay for a few seconds?

问题描述

嘿，我都有这段代码。我想将程序延迟几秒钟，然后显示正在扫描...

Hey all I have this code. I want to delay my program for a few seconds and display "scanning..."

这就是我的所有内容。如果（i == 1）{

try {}，它可以编译但不会延迟任何东西

Here's what I have. This compiles but doesn't delay anything

 if (i==1){

        try {
            Thread.sleep(1);
        } catch (InterruptedException ie)
        {
            System.out.println("Scanning...");
        }

    }

预先感谢
我显然是int i = 1

thanks in advance I have int i = 1 before obviously

推荐答案

如果要暂停，请使用 java.util。 parallel.TimeUnit ：

TimeUnit.SECONDS.sleep(1);

睡觉一秒钟或十分钟

TimeUnit.MINUTES.sleep(10);

或线程睡眠

try        
{
    Thread.sleep(1000);
} 
catch(InterruptedException ex) 
{
    Thread.currentThread().interrupt();
}

另请参见官方文档

TimeUnit.SECONDS .sleep（）将调用 Thread.sleep 。唯一的区别是可读性，在不明显的持续时间内使用TimeUnit可能更容易理解。

TimeUnit.SECONDS.sleep() will call Thread.sleep. The only difference is readability and using TimeUnit is probably easier to understand for non obvious durations.

但是如果您想解决问题

        int timeToWait = 10; //second
        System.out.print("Scanning")
        try {
            for (int i=0; i<timeToWait ; i++) {
                Thread.sleep(1000);
                System.out.print(".")
            }
        } catch (InterruptedException ie)
        {
            Thread.currentThread().interrupt();
        }

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