准备SCJD的一些心得

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package suncertify.test;
 
import junit.framework.*;
import java.io.*;
import java.util.*;
 
import suncertify.db.*;
 
public class DataAdapterClient { public static void main(String[] args) throws Exception { DataAdapter da1 = new DataAdapter(); DataAdapter da2 = new DataAdapter(); DataAdapter da3 = new DataAdapter(); String s1 = "00000001"; String s2 = "00000002"; String s3 = "00000003"; String s4 = "00000004"; String s5 = "00000005"; String s6 = "00000006"; String[] s7 = {"My Name S7","My Location S7","15","Y","$100.00","2004/12/12","MyOwner7"}; String[] s8 = {"My Name S8","My Location S8","15","Y","$100.00","2004/12/12","MyOwner8"}; String[] s9 = {"My Name S9","My Location S9","15","Y","$100.00","2004/12/12","MyOwner9"}; String[] s10 = {"My Name SX","My Location SX","15","Y","$100.00","2004/12/12","MyOwnerX"}; DataAdapterClient dac = new DataAdapterClient();   RunnerBooking rb1= dac.new RunnerBooking(da1, 0, s1); RunnerBooking rb2= dac.new RunnerBooking(da2, 0, s2); RunnerBooking rb3= dac.new RunnerBooking(da3, 0, s3); RunnerBooking rb4= dac.new RunnerBooking(da1, 0, s4); RunnerBooking rb5= dac.new RunnerBooking(da2, 0, s5); RunnerBooking rb6= dac.new RunnerBooking(da1, 0, s6);
  RunnerBooking rb7= dac.new RunnerBooking(da1, 6, s1); RunnerBooking rb8= dac.new RunnerBooking(da2, 6, s2); RunnerBooking rb9= dac.new RunnerBooking(da3, 6, s3); RunnerBooking rb10= dac.new RunnerBooking(da1, 6, s4); RunnerBooking rb11= dac.new RunnerBooking(da2, 6, s5); RunnerBooking rb12= dac.new RunnerBooking(da1, 6, s6);
  RunnerDelete rd1 = dac.new RunnerDelete(da2, 7); RunnerDelete rd2 = dac.new RunnerDelete(da3, 21); RunnerCreate rc1 = dac.new RunnerCreate(da1, s7); RunnerCreate rc2 = dac.new RunnerCreate(da2, s8); RunnerCreate rc3 = dac.new RunnerCreate(da1, s9); RunnerCreate rc4 = dac.new RunnerCreate(da3, s10);
  rb7.start(); rb8.start(); rb9.start(); rb10.start(); rb11.start(); rb12.start(); rd1.start(); rd2.start(); rc1.start(); rc2.start(); rc3.start(); rc4.start(); rb1.start(); rb2.start(); rb3.start(); rb4.start(); rb5.start(); rb6.start(); }   class RunnerBooking extends Thread { private DataAdapter da; private String customerId; private int recNo; public RunnerBooking() {} public RunnerBooking(DataAdapter da, int recNo, String customerId) { super(); this.da = da; this.recNo = recNo; this.customerId = customerId; } public void run(){ //System.out.println("Thread: " + this); try { da.book(recNo,customerId); } catch (RoomAlreadyBookedException e) { System.out.println("The room is already booked for recNo="+recNo); } catch (Exception e) { e.printStackTrace(); } } }   class RunnerDelete extends Thread { private DataAdapter da; private int recNo; public RunnerDelete() {} public RunnerDelete(DataAdapter da, int recNo) { super(); this.da = da; this.recNo = recNo; } public void run(){ //System.out.println("Thread: " + this); try { da.delete(recNo); } catch (Exception e) { e.printStackTrace(); } } }   class RunnerCreate extends Thread { private DataAdapter da; private String[] s; public RunnerCreate() {} public RunnerCreate(DataAdapter da, String[] s) { super(); this.da = da; this.s = s; } public void run(){ //System.out.println("Thread: " + this); try { int recNo = da.create(s); System.out.println("New Record created, recNo="+ recNo); } catch (Exception e) { e.printStackTrace(); } } }   }