?? fifopagereplacement.java~20~
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package cn.edu.cauc.crab.ossimulate;import java.util.*;import javax.swing.*;/** * <p>Title: OS simulate</p> * <p>Description: This is my home work.</p> * <p>Copyright: Copyleft (c) 2004</p> * <p>Company: CAUC</p> * @author Crab * @version 0.1 *//** * To simulate first in first out page replacement. * * @author Crab * @version 0.1 * @see cn.edu.cauc.crab.ossimulate.PageReplacement */public class FIFOPageReplacement extends PageReplacement { JTextArea out; /** * @param memoryBig init the memory page number. */ public FIFOPageReplacement(int memoryBig) { super(memoryBig); } public FIFOPageReplacement(int memoryBig, JTextArea out) { super(memoryBig); this.out = out; } void printMemory() { System.out.print("內(nèi)存："); Iterator p = memory.iterator(); while (p.hasNext()) { Page page = (Page)p.next(); System.out.print("" + page.number + " "); } System.out.print("\n"); } public void start() { while (!pageList.isEmpty()) { Page page = (Page)pageList.remove(0); if (inMemory(page)) { System.out.print("命中：" + page.number + "\n"); } else { // 未命中 if (memory.size() < memoryBig) { memory.add(page); //out put the memory printMemory(); } else { memory.remove(0);//out the first memory.add(page); //out put the memory printMemory(); } } } } public static void main(String[] args) { PageReplacement pR = new FIFOPageReplacement(3); pR.addPage(7); pR.addPage(0); pR.addPage(1); pR.addPage(2); pR.addPage(0); pR.addPage(3); pR.addPage(0); pR.addPage(4); pR.addPage(2); pR.addPage(3); pR.addPage(0); pR.addPage(3); pR.addPage(2); pR.addPage(1); pR.addPage(2); pR.addPage(0); pR.addPage(1); pR.addPage(7); pR.addPage(0); pR.addPage(1); pR.start(); }}?? 快捷鍵說明
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