Java中的持续时间零字段与示例

Java.time 包中的Duration 类的ZERO字段用于将此持续时间值设置为零。它类似于Java中其他数据类型的 null 值。

句法：

Duration duration = Duration.ZERO;

下面的示例说明了 Duration.ZERO 字段：

示例 1：

// Java code to illustrate ZERO field
  
import java.time.Duration;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Duration using parse() field
        Duration duration
            = Duration.parse("P2DT3H4M");
  
        // Display the duration
        System.out.println(duration);
  
        // Now set the duration to ZERO
        duration = Duration.ZERO;
  
        // Display the duration
        System.out.println(duration);
    }
}

输出：

PT51H4M
PT0S

示例 2：

// Java code to illustrate ZERO field
  
import java.time.Duration;
  
public class GFG {
    public static void main(String[] args)
    {
  
        // Duration
        Duration duration
            = Duration.ofDays(-5);
  
        // Display the duration
        System.out.println(duration);
  
        // Now set the duration to ZERO
        duration = Duration.ZERO;
  
        // Display the duration
        System.out.println(duration);
    }
}

输出：

PT-120H
PT0S

参考： https: Java/docs/api/java/time/Duration.html#ZERO