Need java code for below two question:

Need

 program that will predict the size of a population of organisms. The program should ask the user for the starting number of organisms, their average daily population increase (as a percentage, expressed as a fraction in decimal form: for example 0.052 would mean a 5.2% increaseeach day), and the number of days they will multiply. A loop should display the size of the population for each day.

Prompts, Output Labels and Messages.The three input data should be prompted for with the following prompts: “Enter the starting number organisms: “, “Enter the daily increase: “, and “Enter the number of days the organisms will multiply: ” respectively. After the input has been read in successfully, a table is produced, for example:

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2            300.0

4            675.0

Under the heading is a line of 29 dashes followed by one line for each day, showing the day number and the population at the beginning of that day.

Input Validation.Do not accept a number less than 2 for the starting size of the population. If the user fails to satisfy this print a line with this message “Invalid. Must be at least 2. Re-enter: ” and try to read the value. Similarly, do not accept a negative number for average daily population increase, using the message “Invalid. Enter a non-negative number: ” and retrying. Finally, do not accept a number less than 1 for the number of days they will multiply and use the message “Invalid. Enter 1 or more: “.

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Need program class named SquareDisplay that asks the user for a positive integer no greater than 15. The program should then display a square on the screen using the character ‘X’. The number entered by the user will be the length of each side of the square. For example, if the user enters 5, the program should display the following:

XXXXX

XXXXX

XXXXX

XXXXX

XXXXX

INPUT and PROMPTS. The program prompts for an integer as follows: “Enter an integer in the range of 1-15: “.

OUTPUT. The output should be a square of X characters as described above.

CLASS NAMES. Your program class should be called SquareDisplay