Java SQL Timestamp getNanos()用法及代碼示例

getNanos()函數是Java SQL的Timestamp類的一部分，該函數用於獲取Timestamp對象的秒值的小數部分。該函數返回對象的nanos值。

函數簽名：

public int getNanos()

用法:

ts1.getNanos();

參數：該函數不接受任何參數。

返回值：該函數返回一個整數值，該整數值是對象的nanos值

異常：該函數不會引發任何異常

以下示例說明了getNanos()函數的使用

範例1：創建一個時間戳，並使用getNanos()獲取時間戳對象的小數部分。

// Java program to demonstrate the 
// use of getNanos() function 
  
import java.sql.*; 
  
public class solution { 
    public static void main(String args[]) 
    { 
  
        try { 
  
            // Create two timestamp objects 
            Timestamp ts = new Timestamp(10000); 
  
            // Display the timestamp object 
            System.out.println("Timestamp time:"
                               + ts.toString()); 
  
            // Set the value of the fractional part 
            // of timestamp object 
            // using setNanos function 
            ts.setNanos(1000000); 
  
            // Display the timestamp object's 
            // seconds' fractional part 
            System.out.println("New Timestamp time:"
                               + ts.toString()); 
            System.out.println(" Fractional Part:"
                               + ts.getNanos()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            // Display the error if any error has occured 
            System.err.println(e.getMessage()); 
        } 
    } 
}

輸出：

Timestamp time:1970-01-01 00:00:10.0
New Timestamp time:1970-01-01 00:00:10.001
 Fractional Part:1000000

範例2：創建一個時間戳，並使用getNanos()獲取時間戳對象的小數部分，而不設置秒的任何小數值

// Java program to demonstrate the 
// use of getNanos() function 
  
import java.sql.*; 
  
public class solution { 
    public static void main(String args[]) 
    { 
  
        try { 
  
            // Create two timestamp objects 
            Timestamp ts = new Timestamp(10000); 
  
            // Display the timestamp object 
            System.out.println("Timestamp time:"
                               + ts.toString()); 
  
            // Display the timestamp object's 
            // seconds' fractional part 
            System.out.println("Fractional Part:"
                               + ts.getNanos()); 
        } 
  
        catch (IllegalArgumentException e) { 
  
            // Display the error if any error has occured 
            System.err.println(e.getMessage()); 
        } 
    } 
}

輸出：

Timestamp time:1970-01-01 00:00:10.0
Fractional Part:0

參考： https:// docs.oracle.com/javase/7/docs/api/java/sql/Timestamp.html

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注：本文由純淨天空篩選整理自andrew1234大神的英文原創作品 Java SQL Timestamp getNanos() function with examples。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。