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📜  Java中的 FieldPosition hashCode() 方法与示例

📅  最后修改于: 2022-05-13 01:55:15.155000             🧑  作者: Mango

Java中的 FieldPosition hashCode() 方法与示例

Java.text.FieldPosition类的hashCode()方法用于获取FieldPosition 对象的hashcode。

句法:

public int hashCode()

参数:此方法不接受任何参数作为参数。

返回值:此方法返回此 FieldPosition 对象的哈希码。

以下是说明hashCode()方法的示例:

示例 1:

// Java program to demonstrate
// hashCode() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos
                = new FieldPosition(
                    MessageFormat.Field.ARGUMENT);
  
            // getting hash code of this
            // field position object
            // using hashCode() mehtod
            int i = pos.hashCode();
  
            // display result
            System.out.println("hashCode. :- " + i);
        }
  
        catch (ClassCastException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}
输出:
hashCode. :- -16777216

示例 2:

// Java program to demonstrate
// hashCode() method
  
import java.text.*;
import java.util.*;
import java.io.*;
  
public class GFG {
    public static void main(String[] argv)
    {
        try {
  
            // Creating and initializing
            // new FieldPosition Object
            FieldPosition pos
                = new FieldPosition(
                    DateFormat.Field.AM_PM);
  
            // getting hash code of this
            // field position object
            // using hashCode() mehtod
            int i = pos.hashCode();
  
            // display result
            System.out.println("hashCode. :- " + i);
        }
  
        catch (ClassCastException e) {
  
            System.out.println("Exception thrown : " + e);
        }
    }
}
输出:
hashCode. :- -16777216

参考: https://docs.oracle.com/javase/9/docs/api/ Java/text/FieldPosition.html#hashCode–