The hashCode() method of java.lang.reflect.Constructor class is used to return a hashcode for this Constructor object. The hashcode is always the same if the constructed object doesn’t change. Hashcode is a unique code generated by the JVM at the time of class object creation. We can use hashcode to perform some operation on hashing related algorithms like a hashtable, hashmap, etc. We can search for an object with that unique code.
Syntax:
public int hashCode()
Parameters: This method accepts nothing.
Return: This method returns a hash code integer value for this object.
Below programs illustrate hashCode() method:
Program 1:
// Java program to illustrate hashCode() method import java.lang.reflect.Constructor;import java.util.ArrayList; public class GFG { public static void main(String[] args) { // create a class object Class classObj = ArrayList.class; // get Constructor object // array from class object Constructor[] cons = classObj.getConstructors(); // get hash code of this constructor class int code = cons[0].hashCode(); // print result System.out.println( "Hash Code count = " + code); }} |
Output:
Hash Code count = -1114099497
Program 2:
// Java program to illustrate hashCode() method import java.lang.reflect.Constructor; public class GFG { public static void main(String[] args) { // create a class object Class classObj = String.class; // get Constructor object // array from class object Constructor[] cons = classObj.getConstructors(); // get hash code of this constructor class int code = cons[0].hashCode(); // print result System.out.println( "Hash Code count for string class" + " constructor = " + code); }} |
Output:
Hash Code count for string class constructor = 1195259493
References: https://docs.oracle.com/javase/10/docs/api/java/lang/reflect/Constructor.html#hashCode()
