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Program: How to check whether the value exists or not in a LinkedHashMap?


Description:

Below example helps us to find whether a LinkedHashMap object contains the given value or not. The method containsValue() returns boolean value true if the value exists.


Code:
package com.java2novice.linkedhashmap;

import java.util.LinkedHashMap;

public class MyMapValueCheck {

	public static void main(String a[]){
		
		LinkedHashMap<String, String> lhm = new LinkedHashMap<String, String>();
		lhm.put("one", "This is first element");
		lhm.put("two", "This is second element");
		lhm.put("four", "Element inserted at 3rd position");
		System.out.println("Map contains value 'This is first element'? "
				+lhm.containsValue("This is first element"));
	}
}

Output:
Map contains value 'This is first element'? true
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List Of All LinkedHashMap Sample Programs:

  1. LinkedHashMap basic operations
  2. How to iterate through LinkedHashMap?
  3. How to check whether the value exists or not in a LinkedHashMap?
  4. How to delete all entries from LinkedHashMap object?
  5. How to eliminate duplicate user defined objects as a key from LinkedHashMap?
  6. How to find user defined objects as a key from LinkedHashMap?
  7. How to delete user defined objects as a key from LinkedHashMap?
Knowledge Centre
Class, Constructor and Primitive data types
Class is a template for multiple objects with similar features and it is a blue print for objects. It defines a type of object according to the data the object can hold and the operations the object can perform. Constructor is a special kind of method that determines how an object is initialized when created. Primitive data types are 8 types and they are: byte, short, int, long, float, double, boolean, char.
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About Author

I'm Nataraja Gootooru, programmer by profession and passionate about technologies. All examples given here are as simple as possible to help beginners. The source code is compiled and tested in my dev environment.

If you come across any mistakes or bugs, please email me to [email protected].

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Reference: Java™ Platform Standard Ed. 7 - API Specification | Java™ Platform Standard Ed. 8 - API Specification | Java is registered trademark of Oracle.
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