Question
Please place comments where indicated in the Java code below. Paste complete code when done and make sure it runs. Code: /** * Address.java *
Please place comments where indicated in the Java code below. Paste complete code when done and make sure it runs.
Code:
/**
* Address.java
*
* Usage:
* java Address
*
* For the given page size and virtual address,
* this program reports the page number and offset.
*/
public class Address
{
public static final int ADDRESS_SIZE = 32;
public static void main(String[] args) {
if (args.length != 2) {
System.err.println("Usage: java Address
System.exit(0);
}
/* Comment Here */
int pageSize = Integer.parseInt(args[0].trim());
int address = Integer.parseInt(args[1].trim());
int pageBits = 0;
int pageMask = 0;
int offsetMask = 0;
/* Comment Here */
switch (pageSize) {
case 1024:
pageBits = 10;
offsetMask = 0x000003ff;
pageMask = 0xfffffc00;
break;
case 2048:
pageBits = 11;
offsetMask = 0x000007ff;
pageMask = 0xfffff800;
break;
case 4096:
pageBits = 12;
offsetMask = 0x00000fff;
pageMask = 0xfffff000;
break;
case 8192:
pageBits = 13;
offsetMask = 0x00001fff;
pageMask = 0xffffe000;
break;
case 16384:
pageBits = 14;
offsetMask = 0x00003fff;
pageMask = 0xffffcfff;
break;
}
int pageNumber = (address & pageMask) >> pageBits;
int offset = (address & offsetMask);
/* Comment Here */
System.out.println("For address " + address + " page number = " + pageNumber + " offset = " + offset);
}
}
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