Java

Program 1 : Read from User Input and write to user output.
Program code :

Program 2 : Ask users name and his age and then write it as an output.
Program code :

Program 3 : Read from a file and write to a file.
Code for write to a file :

Code for read from a file :

Program 4 : Replace string with another string.
Program code :

Program 5 : Write a program for finding "First non-repeated character in given string".
Program code : 

Program 6 : Write a program for finding "Permutation of a string". 
Program code : 

Program 7 : Write a program to print the following pattern".  
      1
    121
  12321
1234321
  12321
    121
      1

Program code : 

Program 8 : Write a program to sum a number in given string.
Program code :

Program 9 : Write a program to insert data into database and retrieve from database.
Program code :