解析 Java 中的 hashCode()方法,示例

原文:https://www . geesforgeks . org/parse position-hashcode-method-in-Java-with-example/

类的 hashCode() 方法用于检索当前解析位置对象的 hash 代码。

语法:

public int hashCode()

参数:该方法不接受任何参数作为参数。

返回值:该方法返回当前解析位置对象的哈希代码

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)
    {
        try {

            // Creating and initializing
            // new ParsePosition Object
            ParsePosition pos
                = new ParsePosition(500);

            // getting hashCode for
            // current ParsePosition Object
            // using getIndex() method
            int i = pos.hashCode();

            // display result
            System.out.println(
                "hashCode: "
                + Integer.toString(i));
        }

        catch (ClassCastException e) {

            System.out.println(e);
        }
    }
}

输出:

hashCode: -65036

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 ParsePosition Object
            ParsePosition pos
                = new ParsePosition(-1);

            // getting hashCode for
            // current ParsePosition Object
            // using getIndex() method
            int i = pos.hashCode();

            // display result
            System.out.println(
                "hashCode: "
                + Integer.toString(i));
        }

        catch (ClassCastException e) {

            System.out.println(e);
        }
    }
}

输出:

hashCode: -1

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