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KeyStore containsAlias() method in Java with Examples

Last Updated : 3 Feb, 2023

The containsAlias() method of java.security.KeyStore class is used to check the presence of the requested alias.

Syntax: 

public final boolean containsAlias(String alias)
 throws KeyStoreException

Parameter: This method seeks the name of the alias as a parameter of String type of which the entry is to be checked.
Return Value: This method returns a Boolean value stating the result.
Exception: This method throws KeyStoreException if you don't initialize this keystore.

Note: All the programs in this article won’t run on online IDE as no ‘privatekey’ Keystore exists. You can check this code on Java compiler on your system. To check this code, create a Keystore ‘privatekey’ on your system and set your own keystore password to access that keystore.

Below are the examples to illustrate the containsAlias() method:

Example 1:  


Output: 
This aliases is present

 

Example 2: For KeyStoreException 


Output: 
Exception thrown :
 java.security.KeyStoreException:
 Uninitialized keystore

 

Reference: https://docs.oracle.com/javase/9/docs/api/java/security/KeyStore.html#containsAlias-java.lang.String-
 

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