Check key exists in Hashmap Java

In below example we are going to Check key exists in Hashmap java

Syntax

<span class="token function">containsKey</span><span class="token punctuation">(</span><span class="token punctuation">)</span>

Example

import java.util.HashMap;
import java.util.Map;

public class KeyExistsHashMapExample {

  public static void main(String[] args) {
    Map<String, String> hashMap = new HashMap<String, String>();
    hashMap.put("1", "Car");
    hashMap.put("2", "Bus");
    hashMap.put("3", "Train");
    boolean isKeyAvaillable = hashMap.containsKey("1");
    if(isKeyAvaillable) {
      System.out.println("The value is "+hashMap.get("1"));
    }
    else {
      System.out.println("Key is not availlable");
    }
  }
}

Output

The value is Car

Reference

https://beginnersbug.com/hashmap-in-java/
https://docs.oracle.com/javase/8/docs/api/java/util/Map.html#containsKey-java.lang.Object-

Download

https://github.com/rkumar9090/BeginnersBug/blob/master/BegineersBug/src/com/geeks/example/KeyExistsHashMapExample.java