Java中的 RuleBasedCollator hashCode() 方法与示例

Java.text.RuleBasedCollator类的hashCode()方法用于获取此 Collator 对象的 hashCode。
句法：

public abstract int hashCode()

参数：此方法不接受任何参数。
返回值：此方法以整数格式返回哈希码值。
以下是说明hashCode()方法的示例：
示例 1：

Java

// 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 simple rule
            String simple = "< a < b < c < d";
 
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
 
            // getting hashCode of this object
            // using hashCode() method
            int hash = col.hashCode();
 
            // display result
            System.out.println("hashCode is :- "
                               + hash);
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : "
                               + e);
        }
        catch (ParseException e) {
 
            System.out.println("Exception thrown : "
                               + e);
        }
    }
}

输出：

hashCode is :- 1882448026

示例 2：

Java

// 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 simple rule
            String simple = "< a < c & a < b";
 
            // Creating and initializing
            // new RuleBasedCollator Object
            RuleBasedCollator col
                = new RuleBasedCollator(simple);
 
            // getting hashCode of this object
            // using hashCode() method
            int hash = col.hashCode();
 
            // display result
            System.out.println("hashCode is :- "
                               + hash);
        }
 
        catch (ClassCastException e) {
 
            System.out.println("Exception thrown : "
                               + e);
        }
        catch (ParseException e) {
 
            System.out.println("Exception thrown : "
                               + e);
        }
    }
}

输出：

hashCode is :- 2022902017

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