Java AbstractList hashCode()方法及示例

java.util.AbstractList 类的 hashCode() 方法用于返回该列表的哈希代码值。

语法

public int hashCode()

返回值： 该方法返回该列表的 hashCode 值。

下面是说明hashCode()方法的例子。

例1 :

// Java program to demonstrate
// hashCode() method
// for Integer value
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
  
        try {
  
            // Creating object of AbstractList<Integer>
            AbstractList<Integer>
                arrlist1 = new ArrayList<Integer>();
  
            // Populating arrlist1
            arrlist1.add(10);
            arrlist1.add(20);
            arrlist1.add(30);
            arrlist1.add(40);
            arrlist1.add(50);
  
            // print arrlist1
            System.out.println("ArrayListlist : " + arrlist1);
  
            // getting the value at the index 3
            // using get() method
            int code = arrlist1.hashCode();
  
            // print the value
            System.out.println("HashCode : " + code);
        }
  
        catch (IndexOutOfBoundsException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出。

ArrayListlist : [10, 20, 30, 40, 50]
HashCode : 38490301

例2 :

// Java program to demonstrate
// hashCode() method
// for String value
  
import java.util.*;
  
public class GFG1 {
    public static void main(String[] argv)
        throws Exception
    {
  
        try {
  
            // Creating object of AbstractList<String>
            AbstractList<String>
                arrlist1 = new ArrayList<String>();
  
            // Populating arrlist1
            arrlist1.add("A");
            arrlist1.add("B");
            arrlist1.add("C");
            arrlist1.add("D");
            arrlist1.add("E");
  
            // print arrlist1
            System.out.println("ArrayListlist : "
                               + arrlist1);
  
            // getting the value at the index 3
            // using get() method
            int code = arrlist1.hashCode();
  
            // print the value
            System.out.println("HashCode : " + code);
        }
  
        catch (IndexOutOfBoundsException e) {
            System.out.println("Exception thrown : " + e);
        }
    }
}

输出。

ArrayListlist : [A, B, C, D, E]
HashCode : 90690786