Question

Please give me all necessary screenshot and comments. (I use Eclipse) Thanks

Assume a system has 32-bit virtual memory address with a 4-KB page size. Write a program that is passed a virtual address (in decimal) and outputs the page number and offset for the given address.

The output should look like:

The address 19986 contains:

      Page number = 4

      Offset = 3602

Your driver should pass the program three numbers: 19986, 347892, and 5978.

Note the program will require using the appropriate data type to store 32 bits. Using an unsigned data type would be a good idea.

Place your program, observations file, and output file in the Dropbox for problem 4 in D2L. The observations should be in a separate attached word or data file. The output should be in a separate attached data file (do not give me a screen shot for your output).

Answer 1

import java.util.Scanner;

public class VirtualAddress {

public static void main(String[] args) {

// TODO Auto-generated method stub

Scanner sc = new Scanner(System.in);

System.out.println("Enter a number: ");

int number = sc.nextInt();

int temp = number;

int mask = 1 << 31;

StringBuilder sbuffer = new StringBuilder();

for (int i = 1; i <= 32; i++) {

sbuffer.append((number & mask) == 0 ? '0' : '1');

number = number << 1;

}

String vAddress = sbuffer.toString();

String pageNumber = vAddress.substring(0,vAddress.length()-12);

String offset = vAddress.substring(20);

System.out.println("The address "+ temp + " contains:");

System.out.println("Page number = " + Integer.parseInt(pageNumber,2));

System.out.println("Offset = " + Integer.parseInt(offset,2));

}

}

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SEE OUTPUT

Thanks, PLEASE COMMENT if there is any concern.