Java –数秒遅延させる方法
Javaでは、TimeUnit.SECONDS.sleep()またはThread.sleep()を使用して数秒遅らせることができます。
1. TimeUnit
JavaDelayExample.java
package com.example;
import java.util.Date;
import java.util.concurrent.TimeUnit;
public class JavaDelayExample {
public static void main(String[] args) {
try {
System.out.println("Start..." + new Date());
// delay 5 seconds
TimeUnit.SECONDS.sleep(5);
System.out.println("End..." + new Date());
// delay 0.5 second
//TimeUnit.MICROSECONDS.sleep(500);
// delay 1 minute
//TimeUnit.MINUTES.sleep(1);
} catch (InterruptedException e) {
System.err.format("IOException: %s%n", e);
}
}
}
出力
Start...Mon Apr 08 21:42:55 SRET 2019 End...Mon Apr 08 21:43:00 SRET 2019
2. Thread.sleep
JavaDelayExample2.java
package com.example;
import java.util.Date;
public class JavaDelayExample2 {
public static void main(String[] args) {
try {
System.out.println("Start..." + new Date());
// delay 5 seconds
Thread.sleep(5000);
System.out.println("End..." + new Date());
} catch (InterruptedException e) {
System.err.format("IOException: %s%n", e);
}
}
}