java 根据类名示例化类_Java即时类| with（）方法与示例

灰太狼 2023-03-05 15:51 6阅读 0赞

java 根据类名示例化类

## 即时类with()方法 **(**Instant Class with() method**)** ##

**Syntax:**

**句法：**

public Instant with(TemporalAdjuster t_adjuster);
        public Instant with(TemporalField t_field, long new_val);

*  **with() method** is available in java.time package.
    
    **with()方法**在java.time包中可用。
 *  **with(TemporalAdjuster t\_adjuster) method** is used to represent this Instant with the given adjuster.
    
    **with(TemporalAdjuster t\_adjuster)方法**用于用给定的调整器表示此Instant。
 *  **with(TemporalField t\_field, long new\_val) method** is used to set the given value for the given field.
    
    **with(TemporalField t\_field，long new\_val)方法**用于为给定字段设置给定值。
 *  These methods may throw an exception at the time of representing Instant with the given adjustment.
    
    在使用给定的调整量表示Instant时，这些方法可能会引发异常。
    
     *  **DateTimeException**: This exception may throw when this Instant couldn't adjust with the given adjuster.**DateTimeException** ：如果此Instant无法使用给定的调整器进行调整，则可能引发此异常。
     *  **ArithmeticException**: This exception may throw when the calculated result exceeds the limit to represent this object.**ArithmeticException** ：当计算结果超出表示此对象的限制时，可能引发此异常。
 *  These are non-static methods and it is accessible with class objects and if we try to access these methods with the class name then we will get an error.
    
    这些是非静态方法，可通过类对象访问，如果尝试使用类名访问这些方法，则会收到错误消息。

**Parameter(s):**

**参数：**

*  In the first case, "with(TemporalAdjuster t\_adjuster)",
    
    在第一种情况下，“ with(TemporalAdjuster t\_adjuster)”
    
     *  TemporalAdjuster t\_adjuster – represents the field in which to set the value the given value.
     *  TemporalAdjuster t\_adjuster –表示在其中将值设置为给定值的字段。
 *  In the second case, "with(TemporalField t\_field, long new\_val)",
    
    在第二种情况下，“ with(TemporalField t\_field，long new\_val)”，
    
     *  TemporalField t\_field – represents the field in which to set the value the given value.
     *  TemporalField t\_field –表示将值设置为给定值的字段。
     *  long new\_val – represents new value to set for the given field.
     *  long new\_val –表示要为给定字段设置的新值。

**Return value:**

**返回值：**

In both the cases, the return type of the method is Instant, it returns the Instant that holds the value of this Instant with the given object.

在这两种情况下，方法的返回类型均为Instant ，它返回包含具有给定对象的该Instant值的Instant。

**Example:**

**例：**

// Java program to demonstrate the example 
    // of with() method of Instant
    
    import java.time.*;
    import java.time.temporal.*;
    
    public class WithOfInstant {
        
        public static void main(String args[]) {
        
            long field_val = 10;
    
            // Instantiates two Instant 
            Instant ins1 = Instant.parse("2006-04-03T05:10:15.00Z");
            Instant ins2 = Instant.now();
    
            // Display ins1,ins2
            System.out.println("Instant ins1 and ins2: ");
            System.out.println("ins1: " + ins1);
            System.out.println("ins2: " + ins2);
            System.out.println("field_val to set: " + field_val);
    
            System.out.println();
    
            // Here, this method adjusts this Instant 
            // with the given adjuster
            Instant with_val = ins1.with(ins2);
    
            // Display with_val
            System.out.println("ins1.with(ins2): " + with_val);
    
            // Here, this method sets the new value 
            // for the given field in this Instant
            with_val = ins1.with(ChronoField.MICRO_OF_SECOND, field_val);
    
            // Display with_val
            System.out.println("ins1.with(ChronoField.MICRO_OF_SECOND,field_val): " + with_val);
        }
    }

**Output**

**输出量**

Instant ins1 and ins2: 
    ins1: 2006-04-03T05:10:15Z
    ins2: 2020-05-28T07:42:39.007362Z
    field_val to set: 10
    
    ins1.with(ins2): 2020-05-28T07:42:39.007362Z
    ins1.with(ChronoField.MICRO_OF_SECOND,field_val): 2006-04-03T05:10:15.000010Z

> 翻译自: [https://www.includehelp.com/java/instant-with-method-with-example.aspx][https_www.includehelp.com_java_instant-with-method-with-example.aspx]

java 根据类名示例化类

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