Java Date equals()用法及代碼示例

Java Date類的equals()方法基於毫秒差檢查兩個Date是否相等。

用法:

public boolean equals(Object obj)

參數：該函數接受單個參數obj，該參數指定要與之進行比較的對象。

返回值：該函數提供以下2個返回值：

如果對象相等，則為true。
如果對象不相等，則返回false。

異常：該函數不會引發任何異常。

下麵的程序演示了上述函數：

// Java code to demonstrate 
// equals() function of Date class 
  
import java.util.Date; 
import java.util.Calendar; 
public class GfG { 
    // main method 
    public static void main(String[] args) 
    { 
  
        // creating a Calendar object 
        Calendar c = Calendar.getInstance(); 
  
        // set Month 
        // MONTH starts with 0 i.e. ( 0 - Jan) 
        c.set(Calendar.MONTH, 11); 
  
        // set Date 
        c.set(Calendar.DATE, 05); 
  
        // set Year 
        c.set(Calendar.YEAR, 1996); 
  
        // creating a date object with specified time. 
        Date dateOne = c.getTime(); 
  
        System.out.println("Date 1: " + dateOne); 
  
        // creating a date of object 
        // storing the current date 
        Date currentDate = new Date(); 
  
        System.out.println("Date 2: " + currentDate); 
  
        System.out.println("Are both dates equal: "
                           + currentDate.equals(dateOne)); 
    } 
}

輸出：

Date 1: Thu Dec 05 08:19:56 UTC 1996
Date 2: Wed Jan 02 08:19:56 UTC 2019
Are both dates equal: false

// Java code to demonstrate 
// equals() function of Date class 
  
import java.util.Date; 
import java.util.Calendar; 
public class GfG { 
    // main method 
    public static void main(String[] args) 
    { 
  
        // creating a Calendar object 
        Calendar c1 = Calendar.getInstance(); 
  
        // set Month 
        // MONTH starts with 0 i.e. ( 0 - Jan) 
        c1.set(Calendar.MONTH, 11); 
  
        // set Date 
        c1.set(Calendar.DATE, 05); 
  
        // set Year 
        c1.set(Calendar.YEAR, 1996); 
  
        // creating a date object with specified time. 
        Date dateOne = c1.getTime(); 
  
        System.out.println("Date 1: " + dateOne); 
  
        // creating a Calendar object 
        Calendar c2 = Calendar.getInstance(); 
  
        // set Month 
        // MONTH starts with 0 i.e. ( 0 - Jan) 
        c2.set(Calendar.MONTH, 11); 
  
        // set Date 
        c2.set(Calendar.DATE, 05); 
  
        // set Year 
        c2.set(Calendar.YEAR, 1995); 
  
        // creating a date object with specified time. 
        Date dateTwo = c2.getTime(); 
  
        System.out.println("Date 1: " + dateTwo); 
  
        System.out.println("Are both dates equal: "
                           + dateTwo.equals(dateOne)); 
    } 
}

輸出：

Date 1: Thu Dec 05 08:20:05 UTC 1996
Date 1: Tue Dec 05 08:20:05 UTC 1995
Are both dates equal: false

相關用法

注：本文由純淨天空篩選整理自Twinkl Bajaj大神的英文原創作品 Date equals() method in Java 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。