java hash code example

Example 1: print hashtable in java

table.forEach( 
            (k, v) -> System.out.println("Key : " + k + ", Value : " + v));

Example 2: hashmaps java

import java.util.HashMap;
//Within a class
//You can do new HashMap<Key Type, Value Type>();, but you don't need to
HashMap<Int, String> examplehashmap=new HashMap<>();
{
//put in values
 examplehashmap.put(5, "example");
};
//get value
examplehashmap.get(5);
//returns "example"

Example 3: java hashcode

@Overridepublic int hashCode() {    int hash = 7;    hash = 31 * hash + (int) id;    hash = 31 * hash + (name == null ? 0 : name.hashCode());    hash = 31 * hash + (email == null ? 0 : email.hashCode());    return hash;}

Example 4: java hashset

HashSet<String> hset = new HashSet<String>();
// Adding elements to the HashSet
hset.add("Apple");
hset.add("Mango");