Java SQL Timestamp before()用法及代码示例

before()函数是Java SQL的Timestamp类的一部分。该函数返回一个布尔值，该布尔值表示Timestamp对象是否出现在给定的Timestamp对象之前。

函数签名：

public boolean before(Timestamp t)

用法:

ts1.before(ts2);

参数：该函数接受Timestamp对象作为要检查的参数。

返回值：该函数返回布尔数据类型，该数据类型表示Timestamp对象是否出现在给定的Timestamp对象之前。

异常：该函数不会引发任何异常

以下示例说明了before()函数的使用

范例1：创建两个非相等的时间戳，并检查第二个时间戳是否在第一个时间戳之前。

// Java program to demonstrate the 
// use of before() function 
  
import java.sql.*; 
  
public class solution { 
    public static void main(String args[]) 
    { 
  
        // Create two timestamp objects 
        Timestamp ts1 = new Timestamp(10003); 
        Timestamp ts2 = new Timestamp(10001); 
  
        boolean b = ts2.before(ts1); 
  
        // Check if the second timestamp occurs 
        // before first timestamp 
        if (b) { 
  
            // If true print that the Second Timestamp 
            // occurs before the first timestamp 
            System.out.println("Second Timestamp occurs"
                               + " before first timestamp"); 
        } 
  
        else { 
  
            // If false print that the Second Timestamp 
            // does not occur before the first timestamp 
            System.out.println("Second Timestamp does not occur"
                               + " before first timestamp"); 
        } 
    } 
}

输出：

Second Timestamp occurs before first timestamp

范例2：创建两个相等的时间戳，并检查第二个时间戳是否出现在第一个时间戳之前

// Java program to demonstrate the 
// use of before() function 
  
import java.sql.*; 
  
public class solution { 
    public static void main(String args[]) 
    { 
  
        // Create two timestamp objects 
        Timestamp ts1 = new Timestamp(10000); 
        Timestamp ts2 = new Timestamp(10000); 
  
        boolean b = ts2.before(ts1); 
  
        // Check if the second timestamp occurs 
        // before first timestamp 
        if (b) { 
  
            // If true print that the Second Timestamp 
            // occurs before the first timestamp 
            System.out.println("Second Timestamp occurs"
                               + " before first timestamp"); 
        } 
  
        else { 
  
            // If false print that the Second Timestamp 
            // does not occur before the first timestamp 
            System.out.println("Second Timestamp does not"
                               + " occur before first timestamp"); 
        } 
    } 
}

输出：

Second Timestamp does not occur before first timestamp

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

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注：本文由纯净天空筛选整理自andrew1234大神的英文原创作品 Java SQL Timestamp before() function with examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。