Create the Runnable interface reference and write the Lambda expression for the run() method. Create a Thread class object passing the above-created reference of the Runnable interface since the start() method is defined in the Thread class its object needs to be created. Invoke the start() method to run the thread.
Lambda expressions can be stored in variables if the variable's type is an interface which has only one method. The lambda expression should have the same number of parameters and the same return type as that method. Java has many of these kinds of interfaces built in, such as the Consumer interface (found in the java.
Let IntelliJ do the lifting here; you can invoke Alt + Enter (or Option + Return on Mac) to allow IntelliJ to replace it with a lambda expression.
Alt + Enter is good way to change each one individual
but there is away to change all lambda expression across app
Run Inspection by Name
Ctrl + Shift+ Alt + I
source site
How we can use it in our Android Studio and lambda expression:
just write replace lambda as Inspection name called anonymous type can be replaced with lambda
List of occurrence will appear change each one manually
Tutorial Video
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