How to generate 4 digit otp in java

You may go through Generate a One Time Password or Unique Identification URL article before this for better understanding.  

Many a times we forget our passwords and we opt for Forget password option and within no time we get a new password at our registered email-ID or phone no.

to login our account. And every time we get a different password. Sometimes we access our bank accounts while shopping from an online store or many more ways, in order to verify our transactions from the bank account, they send us OTP(One Time Password) on our registered phone no.

Generating password and otp in java project

or our email-ID, within no time. The following code explains how to generate such Passwords and OTP within no time and what code we can use if in case we need to do so.

Method 1:

Java program explaining the generation of Password 

Note : The password we are generating will change every time.

As we have used random() method to generate the password. 

Output : 

Generating password using random() : Your new password is : KHeCZBTM;-

Java program

how to generate and validate otp in java

how to generate otp and send to mobile in java