用示例选择 Java 中的 hashCode()方法

原文:https://www . geesforgeks . org/choice format-hashcode-method-in-Java-with-examples/

Java . text . choice format类的 hashCode() 方法用于获取 choice 格式对象的 hash 代码。该 hashcode 值以整数形式返回。

语法:

public int hashCode()

参数:此方法不接受任何参数。

返回值:该方法将选择格式对象的哈希码返回为整数。

下面是举例说明 hashCode() 方法的例子:

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)
    {
        // creating and initializing ChoiceFormat
        ChoiceFormat cf
            = new ChoiceFormat(
                "4#wed| 5#thu | 6#fri | 7#sat");

        // getting hashcode of  ChoiceFormat object
        // using hashCode() method
        int hash = cf.hashCode();

        // display the result
        System.out.print("hashCode :- " + hash);
    }
}

输出:

hashCode :- 113634 

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)
    {
        // creating and initializing limit
        double[] limit = { 1, 2, 3, 4 };

        // creating and initializing format
        String[] format
            = { "add", "sub", "multiply", "divide" };

        // creating and initializing ChoiceFormat
        ChoiceFormat cf
            = new ChoiceFormat(limit, format);

        // getting hashcode of  ChoiceFormat object
        // using hashCode() method
        int hash = cf.hashCode();

        // display the result
        System.out.print("hashCode :- " + hash);
    }
}

输出:

hashCode :- -1331463043

参考:https://docs . Oracle . com/javase/9/docs/API/Java/text/choice format . html # hashCode–