Java Date from()用法及代碼示例

// Java code to demonstrate 
// from() method of Date class 
  
import java.time.Instant; 
import java.util.Date; 
  
public class JavaDateDemo { 
    public static void main(String args[]) 
    { 
        // Creating Date Object 
        Date dateOne = new Date(); 
  
        // Creating Instant object 
        Instant inst = Instant.now(); 
  
        // Displaying the instant 
        System.out.println( 
            "Present: "
            + dateOne.from(inst)); 
    } 
}

import java.util.Date; 
import java.util.Calendar; 
import java.time.Instant; 
  
public class GfG { 
    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, 00); 
  
        // Set Date 
        c1.set(Calendar.DATE, 30); 
  
        // Set Year 
        c1.set(Calendar.YEAR, 2019); 
  
        // Creating a date object 
        // with specified time. 
        Date dateOne = c1.getTime(); 
  
        Instant inst = dateOne.toInstant(); 
  
        System.out.println( 
            "Date: " + dateOne.from(inst)); 
    } 
}