Write a java program to create a method to replace the character a with x in a string and create another method which replaces the character a with y in a string to override the first method. Use...

Write a java program to create a method to replace the character a with x in a string and create another method which replaces the character a with y in a string to override the first method. Use overriding and inheritance concepts. (write a code without using inbuilt methods like sort, avg etc). Draw a flow chart for the code